Boat Motor Idles But Wont Accelerate

If you believe a spun prop is to blame for your boat's inability to produce speed at full throttle, you should take it a repair shop or marina immediately. ETA: This only holds true on a single engine boat i. I'v got an Mercury 50 hp outboard engine from 1979. After the motor would get warm it would not return to idle. It hits a certain rpm and just starts surging like in the video. i just got my warrior about 3 months ago and it was doing something similar it would idle good but then as soon as you gave it any gas it bogged down really bad and you could barely give it enough gas to get it into gear without stalling. Symptoms: I have to run 5 knots (approx 1200 rpm) through a no wake zone which takes about 20 mins to get to the ocean. The accelerator pump is just a rubber piston inside the carburetor that squirts fuel into into throats of the carb while accelerating. Contact Us - 2CoolFishing - Archive - Top - Boat for Sale - Powered by vBulletin. The only safe way to clean a sludged engine is to accelerate the oil changes and let the detergent in the oil do the cleaning at a controlled rate. The kids wanted to go out but with the stalling issue I did not want to take it so I took out the 21 instead. WHY FLUSH All outboard motors and sterndrives (I/Os) are assemblies consisting of a variety of metals; aluminum, steel, iron, brass, copper, bronze, and stainless steel. It starts fine and runs idle good. Has the carb recently been cleaned? A dirty idle circuit can idle fine and rev like crazy, but bog and die as soon as the throttle is opened while under load. Test the IAC to see if it opens and closes properly. Problem: Engine will not idle. Test spark to ensure a bright 7/16 spark onall cyls. There is one thing I say to anything that isnt working properly,, It was till it wasnt,, 2004 engines and you have had them 4 years, have you done any maintenece,, they idle on 4 cylinders in neutral, numbers 2 and 3 do not fire,, so if you have a bad plug in any of the other cylinders then you are only idling on 3 cylinders,, it seems it time for some basic diagnostics,, and if you dont know. Outboard motors have changed all that. The merc manual says to use 1 1/4 turns. Increased engine wear I suspect. " This may only need a minor adjustment for timing or mixture. We where told the motor ran fine, but obviously it does not and im not sure the owner ever had it running. Starts great and ildes great and will even run great at low RPM, but when you try to accelerate the engine falls flat on it's face. The bike hasnt been running to my knowledge for 4-5 months. Fast idle and idle control is determined by the air regulator, the Auxiliary Air Control (AAC) valve and the F. Start the engine, and run it at 1/2 speed for 15 minutes, being sure to keep the bucket full. Run engine at full speed and adjust main jet for highest smooth speed without engine missing due to mixture being too lean or rich. The other day while out boating it just died. An idle speed that is too fast can leave the engine with too much angular momentum upon shutdown, raising the chances that the engine can turn over and burn more fuel and lock itself into a cycle of continuous running. If you have a two-stroke outboard motor, you must add oil to the fuel to lubricate the engine. Ive got a 1999 suzuki dt 140 outboard motor. It usually occurs after cruising and then pulling back on the throttle, it will idle for a minute then shut off. ECM problem, low idle/stalls, random over temp spikes, engine will not start without pushing accelerator. Problem: Engine Will Not Accelerate. Once the motor idles on its own, it is warm enough to operate. Trailer not included but can be negotiated or delivery can be arranged. The engine stalls in neutral, at idle, only. or more plugged, the engine won't transition. Problem: Engine Idles Rough and Stalls. I took the boat out 2. However, a lousy carburetor may cause a multitude of problems with your engine, such as rough idle, stalling, flooding, poor fuel economy, and hard starting. The AC just uses more and because you're not giving it any gas the engine is working to keep at the same idle. A squirt of starter fluid at the boot while running will tell you. One time it died on the water and I had to disassemble part of the fuel line in the motor. I have a V8 5. The engine has probably 9 hours on it. Any Ideas?. If a new alignment wasn't done, then it could be a binding condition between the shaft and stern bearing. We just bought this motor. Will start and idle just fine, but will not accelerate. An "idle speed motor" is just another name for an "idle air control valve" or "IAC". Tried to fix over temp, new radiator, fan clutch, hoses, thermostat, belt, no change. The RPMs increase with throttle increase but the boat does not go any faster. Any thoughts or common problems that would cause this? Thanks for your help!. But here's a test anyway. The boat can be divided into three categories - jet unit, engine, and hull. two-stroke with two Mercarb carberateurs. This is a fallacy as a diesel engine cannot come up to a proper operating temperature when it is not loaded and certainly not at idle. 3) Check Engine Light. 4-stroke outboards are a come-lately phenomenon. Last week it did it when it was cold. boat wil accelerate to 2000 rpm then won't go any faster. Under power above 1000rpm, it seems to run fine, but anything below that, it simply will not idle and sounds like its not running on all cylinders, almost like a misfire. When a combination of any, or all, of these different metals is submerged in saltwater, bad things happen: ELECTROLYTIC CORROSION, when dissimilar metals are submerged in saltwater, an electrolytic process occurs. We where told the motor ran fine, but obviously it does not and im not sure the owner ever had it running. Not fun or safe in a river with fast current. The hour meter is not working right now. It engages the lower unit fine and makes the boat get in gear but will not take any rpm's. The result is poor acceleration, rough idle and stalling. Pulled fuel pump housing. All, I've got a 2003 Supra Launch SS (EDIT: Indmar Assault 320 HP TBI) and in neutral / at idle speed, there is sometimes white smoke / fuel droplets / a smell of gasoline coming from the exhaust. Many people who run in lakes and rivers prefer 4 stroke boat motors because they make great trolling motors and meet the 2006 EPA mandated requirements. This is a fallacy as a diesel engine cannot come up to a proper operating temperature when it is not loaded and certainly not at idle. A heavier flywheel allows for lower RPM idling and vice versa. 16 ] if the boat is ashore, lead a hose from a bucket to the raw water pump, and fill he bucket with water using a garden hose. The fuel bowels are being filled when the motor is idling which lets the motor first rev up but there is not enough fuel getting to them to keep them filled. This will give you an idea of fuel costs going forward and, just as importantly, your fishing range. An idle speed that is too fast can leave the engine with too much angular momentum upon shutdown, raising the chances that the engine can turn over and burn more fuel and lock itself into a cycle of continuous running. So I had my motor serviced a few weeks ago its a 1990 Johnson vro 200hp oil injected 2 stroke. Kohler 16hp idles will not accelerate stallsout have cleaned Walbro carb will solenoid, now will start and idle but when you open the throttle to mowing engine rpm it stalls like it starving for fuel. I have tried the following things:. I'm not sure what to check and appreciate any advice!. two-stroke with two Mercarb carberateurs. or more plugged, the engine won't transition. There's not much else that would cause the engine to die when shifting to neutral when running and not cause a problem when out of gear. The only other thing that comes to mind is the ECM or electronic control module. It will push it backwards. Quick history: The boat repair place has had it for a month messing with it and still cant figure itout( yes Don't say it) THEN GO PICK IT UP. Basically, shell start up fine and idle around 1500-2000 rpm (full choke) but upon going to 1/2 choke or giving her any throttle, she dies. A clean working carburetor ensures a healthy fuel economy and emissions for years. Second hour – accelerate hard enough to put the boat on plane (do not use full throttle) then back off of the throttle but keep the boat on plane. DON'T FORGET ALL THESE ADJUSTMENTS MUST BE MADE WHILE THE BOAT IS RUNNING THROUGH THE WATER. Post by srr5008 » 21 Mar 2012, 14:47. carb has been cleaned and idles perfectly, revs to full rpm in neutral, but not in gear, fwd or rev. Thinking it was bad gas. This boat is located at Lakeside Marine where most service has been complete. Outboard motors have changed all that. 1995, Brunswick Corporation 90-816462 2-695 0 90-816462 2-695 Notice We could not possibly know of and advise the service trade of all conceivable procedures by which a ser-Throughout this publication, “Dangers,” “Warnings” vice might be performed and of the possible hazards and “Cautions” are used to alert the mechanic. Boat starts but wont stay running. I have tried everything. I was told that I should not have to do it, but about half the ETEC owners I have heard do the same thing. For an outboard-powered boat, the best mpg is usually achieved at around 3,500 to 4,000 rpm. I thought maybe it was an over load of Staybil and whatever the shop winterized the gas with so I put in 30 gallons of fresh 87 octane, non-ethanol gas. The RPMs increase with throttle increase but the boat does not go any faster. Allow engine to idle and the adjust Idle Jet Screw for smoothest idle. I checked the timing at idle and it is normal. When your outboard starts right up, keeps running with throttle applied in neutral, but shuts down the moment you come back to idle speed in neutral, the issue is likely to be a sticky or broken AIS (automatic idle speed) valve. Symptoms of a Bad Idle Air Control Valve. However more recently the motor will stall not just at idle, but as I start to accelerate after having idled for a good while. but once I drop it in the water and it starts sucking water up the impeller it won't idle. motor has new spark plugs,impeller, water pump. Then back out to the highest RPM or highest vacuum. Engine stalls 4. If the engine is running in the correct direction you will feel a strong column of air pushed out behind the prop. There is an assumption that the. If so, make sure to run the boat long enough to get the. An "idle speed motor" is just another name for an "idle air control valve" or "IAC". if you have a twin and only one is showing these symptoms, then obviously it's not the check valve. Has the carb recently been cleaned? A dirty idle circuit can idle fine and rev like crazy, but bog and die as soon as the throttle is opened while under load. A "pop-back" (inlet manifold, carburetor/throttle body, or air cleaner) of an internal combustion engine can occur when the valves are not shutting correctly. When a combination of any, or all, of these different metals is submerged in saltwater, bad things happen: ELECTROLYTIC CORROSION, when dissimilar metals are submerged in saltwater, an electrolytic process occurs. Test compression to ensure all cyls are healthy. This is the first time taking the PWC's out this year. Trailer not included but can be negotiated or delivery can be arranged. If I nudge it up slowly, eventually I can get [the boat] on aplan and run like heck. But if the flywheel is too heavy, the car won't accelerate fast enough. If the boat idles fine and revs fine in neutral in the water and idles fine on the trailer, however has. A few things you should look for include irregular idle speed, a check engine light and a stalling engine. Do not install an outboard motor with more horsepower than the maximum rating on the capacity plate of the boat. Boat starts but wont stay running. It hits a certain rpm and just starts surging like in the video. Thing idles great and will idle for hours. Please help with your ideas. 2000ish Polaris Sportsman 500, 4-stroke. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. ANSWER To set idle mixture screws: 1. Test spark to ensure a bright 7/16 spark onall cyls. Tony: My CPL is 1975, As for the idle adjustment, I now have both engines idling at 800 RPM and the surging is fine at idle. Possible Causes and Corrections. 2L with 5spdI idled it 2-3 different times for 30-40 minutes until I realized that the top of the engine is likely not getting enough oil, and won't do that again. This engine has 16 hours on it and I have a parts engine with 268. A set of wires 12 years old worked, but a year later, won't? I don't think it's the wires, because the engine would misfire at an idle, which isn't your problem. Idle Speed screw may have to be adjusted if idle speed is too high/low. The sympton for this situation is the motor will idle ok but wont run at full throtle. boat wil accelerate to 2000 rpm then won't go any faster. The boat runs great when you first start off, after 15 or 20 minutes the motor loses power. P1294 Injector High Side Open - Bank 2/Target idle not reached P1295 Multi-faults - Bank 1 - With Low Side Shorts P1296 Multi-faults - Bank 2 - With Low Side Shorts P1297 Injector High Sides Shorted Together P1298 IDM Failure P1299 Cylinder Head Temperature Sensor Detected Engine Overheating Condition P1300 Boost Calibration Fault. Do you think it's a steering cable issue? We had that replaced a year or so ago. Step 2 - The idle air control motor (valve) is responsible for controlling the engine idle speed, if this part fails or becomes weak the engine idle speed could become erratic, additionally, this condition may or may not trigger the MIL (check engine, service engine soon light. We set the idle (by twisting the butterfly nun on the top of the carbs) to about 2800 in the water and it putt putted around for a bit, but any attempt to accelerate and it bogs and immediately dies. The engine will start swiftly, accelerate, and idle smoothly. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. Mine idles rough, but it will start and idle. two-stroke with two Mercarb carberateurs. This past weekend while fishing the LSR Challenge, my main engine started running rough while trolling. It starts again no problem and gets to idle but won't let me accelerate past about 42000rpm I was working fine before I had to remove the rpm sensor and I tested the fuel pump and solenoids etc. It will accelerate and go into forward and reverse fine now just an extremely high idle. I had the boat out yesterday and everything ran great most of the day. I recently replaced the starter, ran it hard for an hour or so without an. Sample records for fuel system lightning. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. It's frustrating to launch your boat and realize the motor won't start. Engine idles fine, and boat moves fine at slow speed. It starts fine and rev's fine with no load (in neutral). If you decide to troubleshoot the problem yourself, you'll need to understand some basic concepts on what makes the engine run. They managed to replicate the issue when Suzuki techs from Japan were here and were able to see it happening on their monitors. An idle speed that is too fast can leave the engine with too much angular momentum upon shutdown, raising the chances that the engine can turn over and burn more fuel and lock itself into a cycle of continuous running. 1; 2; 3; 4; 5 » 14 CFR 23. It is a 4 cyl. The kids wanted to go out but with the stalling issue I did not want to take it so I took out the 21 instead. This is the first time taking the PWC's out this year. The new slow speed setting was. Test spark to ensure a bright 7/16 spark onall cyls. 954 - Fuel system lightning protection. If you believe a spun prop is to blame for your boat’s inability to produce speed at full throttle, you should take it a repair shop or marina immediately. Most manuals come with a. Increased engine wear I suspect. The other day while out boating it just died. The RPMs increase with throttle increase but the boat does not go any faster. A manifold leak is easily detected by a hissing sound coming from the source of the leak. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. But if no fuel is coming thru the idle circuit, the only other place is thru the venturi's. The check engine light is similar to the one in your car as it can mean a number of things. The new slow speed setting was. It is not the same every time. Idle speed is limited by the weight of the flywheel. Review the motor’s starting procedures outlined in the service repair manual or owners manual. Boat starts but wont stay running. Prevention: It's possible to buy a bad load of fuel, but it's more likely that the fuel went bad while in your boat. Like every 500 miles By the way, if you have low oil pressure, don't bother putzing around with the valve train because the damage you find will be the result of low oil pressure and will return. I've seen this concern many times. 97 GTX idles great but will not accelerate-boggs. However, if you accelerate beyond 1/4 throttle, it bogs and coughs and won't accelerate. For example, two-stroke motors are lighter, faster (in most cases) and less expensive. It hits a certain rpm and just starts surging like in the video. How to Drive a Boat With an Outboard Motor. I am new to this website, not new to the jet ski industry. 5 to 350 horsepower for more than 75 years, though the company's first motors did not have as much horsepower as some of its current motors. Have to wait an hour or so before it will fire up and I can limp back to the dock. Problem: Engine Turns Over but Will Not Start; Problem: Engine Surges or Runs Uneven. Buy an outboard tank that has a quick-attach fitting on. This INSTANT DOWNLOAD 4 horsepower Mercury, Mariner, Yamaha, Suzuki, Johnson and Evinrude outboard engine repair manual was designed for do-it-yourself mechanics and factory trained technicians. Both motors start, run, idle and accelerate with no issue. ETA: This only holds true on a single engine boat i. If there is any cross firing going on, you'll certainly see the blue spark when it happens. The hour meter is not working right now. It was very dangerous as I had to go at such a high rpm through the marina to get back to the dock and then shut off the motor and drift/paddle to the dock. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. boat manufacturer. The best way to check the fuel pump is to remove the line from the pump that goes to the carbs and connect it to a small tank so you can gravity feed it to run the motor and check the. The sympton for this situation is the motor will idle ok but wont run at full throtle. A few things you should look for include irregular idle speed, a check engine light and a stalling engine. Yes, came down and grabbed some gear. 1995, Brunswick Corporation 90-816462 2-695 0 90-816462 2-695 Notice We could not possibly know of and advise the service trade of all conceivable procedures by which a ser-Throughout this publication, “Dangers,” “Warnings” vice might be performed and of the possible hazards and “Cautions” are used to alert the mechanic. The specific RPM is irrelevant but it won't be much higher than the base idle RPM. The AC just uses more and because you're not giving it any gas the engine is working to keep at the same idle. One day I got in the car and before I put the key in the ignition there was a clicking noise inside the car and the check engine light went out. Solution #1: Check and adjust the idle screw. ANY engine with bad compression will not idle - even in neutral. Possible Causes and Corrections. Test spark to ensure a bright 7/16 spark onall cyls. How to Drive a Boat With an Outboard Motor. I have a 2000 70hp 2 Stroke Yamaha motor on the back of my boat and after launching the boat on Saturday, I noticed that by moving the throttle, it wouldn't rev the motor up. And it won't go into gear since it doesn't stay running at idle. 6 degrees and the check engine light is off. It was winterized prior to the sale. It is at least good enough to give me time to give the motor some throttle to keep it running. Engine: 2006 250HP. Overpowering a boat could cause severe instability. If you have a two-stroke outboard motor, you must add oil to the fuel to lubricate the engine. Both are having the same issue. Engine idles fine, and boat moves fine at slow speed. Fast idle and idle control is determined by the air regulator, the Auxiliary Air Control (AAC) valve and the F. Last week it did it when it was cold. Boat starts but wont stay running. Plug the fuel line with a bolt, etc. Seemed to be running smooth and had power from a standing start but would just quit at 2800 and not go any faster. If you have a two-stroke outboard motor, you must add oil to the fuel to lubricate the engine. Both are having the same issue. Buy the right sized carb! If you are trying to use a 600 cfm carb on a lopey-cammed 454, then you must open the primaries too far into the transfer slots just to get enough air into the engine to get it to idle. Stalling, power loss or excessive vibration generally indicates one or more of the following, depending on the specific problem :. The engine stalls in neutral, at idle, only. I have run it for - Answered by a verified Marine Mechanic. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. The check engine light is similar to the one in your car as it can mean a number of things. you might want to try unplugging the parking brake sensor it helped me. At cold start-up it has a rough/choppy idle and seems to smell a little rich. Leaving a tank near empty for long periods of time can cause condensation and water in the gas. Here's what I've checked: Changed spark plugs. Motor idles, but won't accelerate Post by Gramps50 » 22 Mar 2012, 02:23 I was having some isues with my 20 hp Mercury and it turned out that it was sucking air and causing problems, my case it wouldn't idle, would be hard to start & finally it dies while backing up and would not restart. Printed in U. Step 2 - The idle air control motor (valve) is responsible for controlling the engine idle speed, if this part fails or becomes weak the engine idle speed could become erratic, additionally, this condition may or may not trigger the MIL (check engine, service engine soon light. What a mistake that was, It was nasty out there. if you have a twin and only one is showing these symptoms, then obviously it's not the check valve. The engineer advised to mix my own oil with the petrol at 50:1 incase the self oil mixer didn't work as it's an old engine. It could be unusual noise coming from the mechanicals, or possibly just poor top speed. The computer has gone into a "limp home mode" where it idles the engine up super high. Problem: Engine Will Not Accelerate. Won't plane out, and wont go over 3,000 rpm. If your engine tends to hesitate when you accelerate, you might have a bad accelerator pump. Reverse works fine, and the engine revs all the way up when it's in neutral. Also when I shift in forward gear it will do so at first. any thoughts. 5) Adjust the idle stop screw so the engine idle speed obtains 550rpm in drive (auto trans) or 650rpm in neutral (manual trans). Decarbonize outboards. Position yourself so you are straddling the seat nearest the motor. Mercury FourStroke outboard motors are incredibly powerful and efficient and they feature a wide range of applications. Four-stroke motors are cleaner, smoother, and more economical. boat wil accelerate to 2000 rpm then won't go any faster. Best bet here is to consult your owner's manual for the correct procedure. In order to keep the engine idling, the main idle screw gets turned in more and more. Tried to fix over temp, new radiator, fan clutch, hoses, thermostat, belt, no change. I tried doing this in neutral and while in gear and nothing worked. While observing the dashpot work today, it seems like its not extending back out all the way, which is keeping the butterflys open just enough to increase the idle. I was driving home at 65 mph and it felt like the truck died. It engages the lower unit fine and makes the boat get in gear but will not take any rpm's. But here's a test anyway. Start the engine, and run it at 1/2 speed for 15 minutes, being sure to keep the bucket full. This engine has 16 hours on it and I have a parts engine with 268. Yes, came down and grabbed some gear. If a new alignment wasn't done, then it could be a binding condition between the shaft and stern bearing. This has never happened before and just started last week. When you are moving it goes away because your engine is working at a higher RPM, and you only get the vibration at that lower RPM because of the "frequency," one could say, of the engine at that RPM. Occasionally, it will accelerate correctly, but this only seems to happen right after launching the boat. fuel filters have been replaced. 7 Mercury engine with good idle but bogs down while attempting to accelerate. Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. Automatic idle speed valve mercury outboard. It runs great at a low idle and can accelerate to high RPM under no load. The engine may not idle well at a low setting or accelerate as quickly until it is has some running time on it. it is located on the clutch lever it is the top wire that is closest to you while you. Test the IAC to see if it opens and closes properly. Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. I was driving home at 65 mph and it felt like the truck died. I recently purchased a 1983 Outrage that has a 1984 Johnson 150HP. i just got my warrior about 3 months ago and it was doing something similar it would idle good but then as soon as you gave it any gas it bogged down really bad and you could barely give it enough gas to get it into gear without stalling. The gas was not treated prior to the winter, I put two bottles of sea foam in once opened up. I've had a marrine engineer look at it quickly before this and he found no obvious problems. In all three areas, it would have a negative effect on the way the engine runs, especially when the engine is idling. The engine has probably 9 hours on it. Problem: Engine Will Not Accelerate. The computer has gone into a "limp home mode" where it idles the engine up super high. Has the carb recently been cleaned? A dirty idle circuit can idle fine and rev like crazy, but bog and die as soon as the throttle is opened while under load. I have a 2000 70hp 2 Stroke Yamaha motor on the back of my boat and after launching the boat on Saturday, I noticed that by moving the throttle, it wouldn't rev the motor up. Was out on the river the a couple weeks ago cruising around and everything was working fine for about 45 minutes to an hour. could also be a piston push rod and bad bearings and c-clip check to make sure your using the correct spark plug this will cause knocking,change the oil and look for metal. When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. If it revs you have a vacuum leak. Run engine at full speed and adjust main jet for highest smooth speed without engine missing due to mixture being too lean or rich. Engine stalls 4. The rubber bits tend to deteriorate with time and may leak or may clog up the passages in the banjo bolt. 0 only idles, won't accelerate - 2006 F350 6. My motor starts fine and idles fine, but wont get up to speedjust chuggs along at full throttle. Thinking it was bad gas. Then back out to the highest RPM or highest vacuum. Mine idles rough, but it will start and idle. I had my boat de-winterized, oil, filters and impleller changed last month, took it out twice this year and it ran fine. Will start and idle just fine, but will not accelerate. Most modern engine management systems incorporate a knock sensor or two (LTIs use one on each side of the block) for closed loop timing control. We where told the motor ran fine, but obviously it does not and im not sure the owner ever had it running. 2 weeks left of duck season and no boat!! 01-20-2012, 04:49 PM #2. As shown in the picture, these items are located at the back left (right if your standing in front of the car) of the engine, behind the inlet manifold. The engine stalls in neutral, at idle, only. my little husky screw driver set feat in this video https://amzn. Boat stalls when trying to accelerate Boat and Idles great, but won't go into gear without stalling. Engine idles fine, but doesn't accelerate much Welcome to TheMalibuCrew! As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. Then when I ad throttle with the "hand"gas lever (not in gear) the engine will stall. WHY FLUSH All outboard motors and sterndrives (I/Os) are assemblies consisting of a variety of metals; aluminum, steel, iron, brass, copper, bronze, and stainless steel. If you have a two-stroke outboard motor, you must add oil to the fuel to lubricate the engine. Was out on the river the a couple weeks ago cruising around and everything was working fine for about 45 minutes to an hour. Question: My check engine light came on and was steady (not flashing) for about a week without any apparent engine issues. Trailer not included but can be negotiated or delivery can be arranged. My check engine light is flashing fast all the time. My fuel pump is real noisy. -Bliss Perry, 1904. Our car wont accelerate past 30 without seeming like it wants to die. 0L Power Stroke Diesel - 2006 6. Compression in both motors is perfect. Other than that it could be possible to be a wiring issue but i doubt it, so if it isn't dirty it looks like you may be ready to drop about $1500 on a new throttle body. Test compression to ensure all cyls are healthy. Mercury FourStroke outboard motors are incredibly powerful and efficient and they feature a wide range of applications. Any suggestions out there?. This boat is located at Lakeside Marine where most service has been complete. FIXED 2002 350 Ram Van 5. If I nudge it up slowly, eventually I can get [the boat] on aplan and run like heck. It engages the lower unit fine and makes the boat get in gear but will not take any rpm's. The lowest I could get was 900. Solution #2: Poor idle quality can be caused by a vacuum leak. Top : Hi, I am looking for a prop to test and set-up my race boat engine on the bench. Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. 5HP outboard motor, runs perfect. I've been having problems out of my 1995 Mercury outboard [accelerating under load]. This engine has 16 hours on it and I have a parts engine with 268. Step 2 - The idle air control motor (valve) is responsible for controlling the engine idle speed, if this part fails or becomes weak the engine idle speed could become erratic, additionally, this condition may or may not trigger the MIL (check engine, service engine soon light. 1; 2; 3; 4; 5 » 14 CFR 23. 6 hp evinrude outboard motor that won't idle; 6 hp evinrude outboard motor won't start; 1994 mercury 6 hp outboard motor,2 stroke, pumping issue; 1980 6 hp johnson seahorse rough idle "1973 johnson 6 hp slow idle problem" +6 hp johnson swivel bracket removel. The boat’s motor will still operate and function as it should, but the lack of a connection between the propshaft and propeller blades drastically reduces the boat’s top speed. Reverse works fine, and the engine revs all the way up when it's in neutral. 9HP mercury won't accelerate. Then, I went to idle speed, barely moving, to allow a bigger boat to go by (didn't want to be in his wake). 5L 460 efi 188,000 miles This truck has a recently installed rebuilt motor (2weeks ago), new distributor, new belts, hoses, starter, new plugs and wires. 7 Mercury engine with good idle but bogs down while attempting to accelerate. Install a vacuum gauge to a full manifold vacuum port 4. This past weekend while fishing the LSR Challenge, my main engine started running rough while trolling. The motor is relatively new. There is an assumption that the. It starts fine and runs idle good. DO NOT idle the engine, as this will accelerate engine wear ! Check for leaks while running. One time it did the same thing when we first launched the boat. 0 Idle rpm too low 4. I was told that I should not have to do it, but about half the ETEC owners I have heard do the same thing. Other than that it could be possible to be a wiring issue but i doubt it, so if it isn't dirty it looks like you may be ready to drop about $1500 on a new throttle body. The boat accellerates very good without any hesitation. My fuel pump is real noisy. Keeping the idle open far enough to stay running while pulling fuel needed thru the venturi's is a tough task--open too far and it idle's way too fast. A manifold leak is easily detected by a hissing sound coming from the source of the leak. fuel filters have been replaced. 6 hp evinrude outboard motor that won't idle; 6 hp evinrude outboard motor won't start; 1994 mercury 6 hp outboard motor,2 stroke, pumping issue; 1980 6 hp johnson seahorse rough idle "1973 johnson 6 hp slow idle problem" +6 hp johnson swivel bracket removel. Solution #1: Check and adjust the idle screw. The engine has probably 9 hours on it. Invented in the early years of the 20th century, outboards brought the same freedom to small boats that gasoline engines brought to cars. It hits a certain rpm and just starts surging like in the video. Mercury Marine, based in Wisconsin, has been making Mercury outboard motors in two- and four-stroke versions ranging from 2. MARINE ENGINES GM 4 Cylinder. Post by srr5008 » 21 Mar 2012, 14:47. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. I have a 2000 70hp 2 Stroke Yamaha motor on the back of my boat and after launching the boat on Saturday, I noticed that by moving the throttle, it wouldn't rev the motor up. I was told that I should not have to do it, but about half the ETEC owners I have heard do the same thing. rebulit checked the fuel line and put new gas in it. We just replaced a new alternator, starter, spark plugs, speedometer sensor and battery still not wanting to operate correctly. Best bet here is to consult your owner's manual for the correct procedure. The engine stalls in neutral, at idle, only. Problem: Engine Idles Rough and Stalls. An engine that runs too hot or too lean may produce an environment conducive to allowing unspent fuel to burn. But it's not misfiring or anything, it just lacks power and won't accelerate. There are three elements required for. 99 xstar idles but wont accelerate looking for some input ,have a 99 xstar with the 350 ,the boat has no power to accelerate ,i pulled the fuel pump and the pump seems to be working ,,not sure about the fuel pressure ,i went ahead and replaced, the fuel filter but no change , any input about fuel volume or am i going in the wrong direction. al,496HO MPI no modifications. A clean working carburetor ensures a healthy fuel economy and emissions for years. when i put the ski in the water it will run on idle like max 1800 rpm and it will not accelerate. 150hp 1982 v-6 Mercury. What causes the motor to "surge" like a blown motor when it's first started and then after it's is rev'd??? It surges between 900 and 1200. If you have a two-stroke outboard motor, you must add oil to the fuel to lubricate the engine. two-stroke with two Mercarb carberateurs. Crafted for less weight and high displacement, they generate abundant torque. It starts fine and runs idle good. And it won't go into gear since it doesn't stay running at idle. Quick history: The boat repair place has had it for a month messing with it and still cant figure itout( yes Don't say it) THEN GO PICK IT UP. but once I drop it in the water and it starts sucking water up the impeller it won't idle. Sequence above may have to be repeated to get best running. I'm not sure what to check and appreciate any advice!. The new slow speed setting was. It idles fine, and even revs perfectly in neutral, but when I put it in gear in the water it stalls at around 2000 rpms and won't get on plane. Won't plane out, and wont go over 3,000 rpm. When your outboard starts right up, keeps running with throttle applied in neutral, but shuts down the moment you come back to idle speed in neutral, the issue is likely to be a sticky or broken AIS (automatic idle speed) valve. There is an assumption that the. There's not much else that would cause the engine to die when shifting to neutral when running and not cause a problem when out of gear. Problem: Engine will not idle. After an hour of running the boat will stall / die. Problem: Engine will not idle. I've seen this concern many times. I have tried everything. Rough-running outboard motors are Often suffering from carbon buildup. 97 GTX idles great but will not accelerate-boggs. If so, make sure to run the boat long enough to get the. The boat's motor will still operate and function as it should, but the lack of a connection between the propshaft and propeller blades drastically reduces the boat's top speed. work, New jets for the card. This will give you an idea of fuel costs going forward and, just as importantly, your fishing range. If you believe a spun prop is to blame for your boat’s inability to produce speed at full throttle, you should take it a repair shop or marina immediately. ETA: This only holds true on a single engine boat i. The motor isn't very strong so if it is corroded it won't be able to open the butterfly. Ive got a 1999 suzuki dt 140 outboard motor. you might want to try unplugging the parking brake sensor it helped me. Any thoughts or common problems that would cause this? Thanks for your help!. Checks out at 20 psi. Post by srr5008 » 21 Mar 2012, 14:47. I replaced fuel lines to carbs, all vacuum lines, fuel bulb new, vent is clear, Good compression, and idles right, fuel pump works and shifting linkages work. 1995, Brunswick Corporation 90-816462 2-695 0 90-816462 2-695 Notice We could not possibly know of and advise the service trade of all conceivable procedures by which a ser-Throughout this publication, “Dangers,” “Warnings” vice might be performed and of the possible hazards and “Cautions” are used to alert the mechanic. There are three elements required for. As of yesterday, my motor had a high idle (up to 1500 from 750), which happened very suddenly. The previous owner only put 6 hours on the motor. At about 1200 RPM the engine starts to misfire. Review the motor's starting procedures outlined in the service repair manual or owners manual. boat wil accelerate to 2000 rpm then won't go any faster. However, a lousy carburetor may cause a multitude of problems with your engine, such as rough idle, stalling, flooding, poor fuel economy, and hard starting. A manifold leak is easily detected by a hissing sound coming from the source of the leak. Test compression to ensure all cyls are healthy. That is the practice of running the engines at idle for a half-hour before leaving a berth that is thought to be 'warming up the engine'. The RPMs increase with throttle increase but the boat does not go any faster. The boat accellerates very good without any hesitation. 0 only idles, won't accelerate - 2006 F350 6. Consult your owner's manual to check items that may be unique to your motor. Has 2 folding cushioned seats. Under power above 1000rpm, it seems to run fine, but anything below that, it simply will not idle and sounds like its not running on all cylinders, almost like a misfire. 2000 Yamaha 270 Jet BoatPort side motor is new as of August 2018. It hits a certain rpm and just starts surging like in the video. It is not the same every time. The engineer advised to mix my own oil with the petrol at 50:1 incase the self oil mixer didn't work as it's an old engine. I have a V8 5. One time it did the same thing when we first launched the boat. Re: Engine Won’t Accelerate If the engine was fine before and nothing changed on the engine then the problem is either the cable or the transmission gear ratio. 9HP mercury won't accelerate. Advancing the ignition timing TOO MUCH at any speed will result in less power, and may result in damage to the engine. Next 8 hours run the motor at all speeds but –. The engine may not idle well at a low setting or accelerate as quickly until it is has some running time on it. Then back out to the highest RPM or highest vacuum. Disconnected, dirty or fouled spark plugs are common causes for engines that won’t start. A squirt of starter fluid at the boot while running will tell you. Possible Causes and Corrections. Then, I went to idle speed, barely moving, to allow a bigger boat to go by (didn't want to be in his wake). We set the idle (by twisting the butterfly nun on the top of the carbs) to about 2800 in the water and it putt putted around for a bit, but any attempt to accelerate and it bogs and immediately dies. Normal engine maintenance schedule followed. Last week it did it when it was cold. any thoughts. You should also check to make sure the spark plug gap is set correctly. I am a chevy kind of guy but I opted for the ford engine because the 351w is an excellent choice for a boat and I knew 99% of the ski boats used ford and the chevy would be harder to get parts. It will push it backwards. 0 only idles, won't accelerate - 2006 F350 6. In all three areas, it would have a negative effect on the way the engine runs, especially when the engine is idling. Then engine is a DT40 Suzuki 1985 oil injection 2 stroke outboard engine. The best way to check the fuel pump is to remove the line from the pump that goes to the carbs and connect it to a small tank so you can gravity feed it to run the motor and check the. A few things you should look for include irregular idle speed, a check engine light and a stalling engine. The fuel lines seem to be flowing fuel, both to the primer (glow plug) and then to the main supply. 5) Adjust the idle stop screw so the engine idle speed obtains 550rpm in drive (auto trans) or 650rpm in neutral (manual trans). Took it to the shop and they said it runs fine in the shop, checked fuel pressure which was good. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. Also when I shift in forward gear it will do so at first. The boat accellerates very good without any hesitation. Compression in both motors is perfect. If so, make sure to run the boat long enough to get the. I had the boat out yesterday and everything ran great most of the day. when i put the ski in the water it will run on idle like max 1800 rpm and it will not accelerate. Not fun or safe in a river with fast current. It hits a certain rpm and just starts surging like in the video. Outboard motors require that you start them up and hold the gas until they can idle on their own. The specific RPM is irrelevant but it won't be much higher than the base idle RPM. The engine stalls in neutral, at idle, only. If that happens, the engine computer will not let the motor accelerate. Then back out to the highest RPM or highest vacuum. Motor idles, won't accelerate! 2004 60 hp 4 stroke Mercury. If the engine is running in the correct direction you will feel a strong column of air pushed out behind the prop. Idle is fine but when I [rapidly increase the throttle the motor] has no power and dies down. Question: My check engine light came on and was steady (not flashing) for about a week without any apparent engine issues. Compression in both motors is perfect. The boat idles around 800 rpms when its running good. And it will not go above 2200 rpm, and seems to want to shake the engines right off the engine mounts when I push the throttles up that far. The check engine light is similar to the one in your car as it can mean a number of things. If it revs you have a vacuum leak. Problem: Engine Turns Over but Will Not Start; Problem: Engine Surges or Runs Uneven. It hits a certain rpm and just starts surging like in the video. Symptoms of a Bad Idle Air Control Valve. IAC valve? The AAC valve increases the engine idle speed until the engine warms up and then the IAC is supposed to take over, provided it's clean, working properly and the manual idle speed adjustment is set low enough to allow the IAC to control the engine idle speed (should be about 675 rpms with the engine fully warmed up, the transmission in D and fully stopped with your foot on the brake). Then back out to the highest RPM or highest vacuum. A clean working carburetor ensures a healthy fuel economy and emissions for years. two-stroke with two Mercarb carberateurs. A simple outboard motor boat is an excellent place to learn basic boat-handling skills, including the. Problem: Engine Turns Over but Will Not Start; Problem: Engine Surges or Runs Uneven. The softer. Test compression to ensure all cyls are healthy. 16 ] if the boat is ashore, lead a hose from a bucket to the raw water pump, and fill he bucket with water using a garden hose. When I push on the gas pedel it's like a linage poped off, no acceleratation. Toyota Camry 2. my little husky screw driver set feat in this video https://amzn. I had my boat de-winterized, oil, filters and impleller changed last month, took it out twice this year and it ran fine. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. of boost on a 95° day. I'v got an Mercury 50 hp outboard engine from 1979. Re: Engine Won’t Accelerate If the engine was fine before and nothing changed on the engine then the problem is either the cable or the transmission gear ratio. ANSWER To set idle mixture screws: 1. 5HP outboard motor, runs perfect. Problem: Engine Will Not Accelerate. Step 2 - The idle air control motor (valve) is responsible for controlling the engine idle speed, if this part fails or becomes weak the engine idle speed could become erratic, additionally, this condition may or may not trigger the MIL (check engine, service engine soon light. I've been having problems out of my 1995 Mercury outboard [accelerating under load]. 5 hp outboard 2 stroke. The problem: 9. It idles fine, and even revs perfectly in neutral, but when I put it in gear in the water it stalls at around 2000 rpms and won't get on plane. Turning this knob counter-clockwise pulls the threaded rod out which makes the motor run slower. Best bet here is to consult your owner's manual for the correct procedure. The problem is that on most trips, sooner or later we will start the engine to go back to the top of the drift, it starts perfectly normally and idles fine, but when we push the throttle forward the engine will only accelerate slowly to about 3000 rpm and despite the throttle being pushed all the way forward, engine won't accelerate. A great way to check for any cross firing is to park in a dark place at night and open the hood with the engine running. 1995, Brunswick Corporation 90-816462 2-695 0 90-816462 2-695 Notice We could not possibly know of and advise the service trade of all conceivable procedures by which a ser-Throughout this publication, “Dangers,” “Warnings” vice might be performed and of the possible hazards and “Cautions” are used to alert the mechanic. 6 hp evinrude outboard motor that won't idle; 6 hp evinrude outboard motor won't start; 1994 mercury 6 hp outboard motor,2 stroke, pumping issue; 1980 6 hp johnson seahorse rough idle "1973 johnson 6 hp slow idle problem" +6 hp johnson swivel bracket removel. Improper mounting of the outboard motor could result in dangerous conditions and injury. I checked the timing at idle and it is normal. A manifold leak is easily detected by a hissing sound coming from the source of the leak. i have a 05 seadoo rxp with 60 hours, i have had this ski for a year. 5HP outboard motor, runs perfect. boat wil accelerate to 2000 rpm then won't go any faster. Two weekends ago when. boat manufacturer. Rough idle yamaha 115. So I took my service manual and started following the troubleshoot steps. 0 Idle rpm too low 4. The other day it started this Starts fine, idles fine - but when you put it in. I've had a marrine engineer look at it quickly before this and he found no obvious problems. boat manufacturer. The check engine light is similar to the one in your car as it can mean a number of things. to/2iaecxa get your own mowermedic1 merch! t-shirts , mugs , stickers , totes and much more. I recently replaced the starter, ran it hard for an hour or so without an. it will start back up, but only idle. Decarbonize outboards. The hour meter is not working right now. motor has new spark plugs,impeller, water pump. This may not be likely but check that the choke plate isn't flopping around. As shown in the picture, these items are located at the back left (right if your standing in front of the car) of the engine, behind the inlet manifold. The bike hasnt been running to my knowledge for 4-5 months. But if no fuel is coming thru the idle circuit, the only other place is thru the venturi's. The best way to check the fuel pump is to remove the line from the pump that goes to the carbs and connect it to a small tank so you can gravity feed it to run the motor and check the. Any advice is greatly appreciated. A great way to check for any cross firing is to park in a dark place at night and open the hood with the engine running. A few things you should look for include irregular idle speed, a check engine light and a stalling engine. the idle jet at 2 turns turns out. Turn the screws all the way in until lightly seated 5. Run engine at full speed and adjust main jet for highest smooth speed without engine missing due to mixture being too lean or rich. Each 4hp engine repair manual covers every aspect of repair. On the small side of things a simple vacuum hose might get pushed off which is an easy fix.