This troubleshooting guide will help you determine why your 9.9HP Mercury boat motor won’t start. In most pre-rigged boats being delivered these days, the primer bulb is seen located within 12-18 inches of the engine. Comment . Try a manual reset. The fuel bulb is soft. Then today, after … It could be a simple issue like a fuel filter plugged so tight that no fuel can pass through. Remove spark plug and try to move engine manually. Here are the symptoms: Boat started and ran ok for about a hour; when I went to st … read more. I removed and replaced the fuel-water separator (had a … YouTube,  Won't Stay Running. Two separate pickups in the fuel tank? Smart bulbs acting up? When the primer bulb isn't working, it may be a problem with the bulb itself, with the fuel lines that feed fuel to the bulb or both. Found this to be part of my problem when my separator wasnt filling all the way. If the adjustment is ok, a new revised selector mechanism must be fitted. Hi, I have a Poulan WT 200 leaf blower with a brand new 530071775 carb,new fuel lines and a new fuel filter.I can't get the primer bulb to fill with fuel.I've tried with the carb attached & unattached to the engine block.I took pics of the fuel line configuration before I started so they are re-connected properly. The most common cause of the fuel system not holding pressure up to the injectors is the fuel pump inside the fuel tank. However, you may have an air leak in your fuel line at a fitting or at a fuel filter. The 8.1, or Vortec 8100, is a gas engine. Remove the starter assembly and inspect it to determine if it is working properly. Now when the engine is shut off after running a while. If your saw stalls out on idle or if the chain rotates, your engine speed is set improperly. Easy quick test. Remember: Using others' images on the web without their permission may be bad manners, or worse, copyright infringement. The DuraMax is a 6.6 engine. Watch the Fuel Filter. More noticeable at lower rpm's, and yes would run pretty badly. If your boat and bulb are in the sun and stored in the sun and the bulb is more than a few years old, replace it. If the fuel lines are okay but fuel doesn't move through the lines when you press the primer bulb, the fuel filter may be clogged. If the filter appears dirty, replace it with new one. Inspect the fuel filter for blockage or discoloration. Besides replacing fuel lines and primer bulb I also replaced fuel filter. Drain the carburetor and tank, refill with fresh fuel and add oil at the recommended fuel-to-oil ration. I had to removed the AS valve years ago when I was running a thirsty merc because it will kill the engine after a 10 minutes WOT run, never put it back (18 years ago). Good luck. Starter recoil is just jammed or actually broken. Easily create a Forum Website with Website Toolbox. 06-17-2012, 05:02 PM. A hole in the fuel line on the tank side could also cause the fuel pump to suck air instead of fuel from the fuel tank. Remember: Using others' images on the web without their permission may be bad manners, or worse, copyright infringement. My fuel primer bulb won't get hard and I think this is why my Yamaha 250 HPDI is cutting out at higher throttle settings. Thank you!,,,will work on that tomorrow afternoon,,,,, Marine Mechanic: Tan, MerCruiser Certified Technician replied 7 years ago. Car is hard to start Inspection: $79.99 - $89.99: Get a Quote: Jay Safford . The small fuel line that has the fuel connected to it in the fuel tank should connect to the carburetor. If the recoil starter assembly is defective, the leaf blower won't start. Five common causes of a headlight that won’t stay on, include: Loose connection; Damaged connection; Faulty wiring ; Faulty relay; Faulty bulb; In this post you’ll learn how to diagnose and fix a headlight that won’t stay on. And also at the end of the fuel system there is a "Fuel pump" (Look at the picture)    with 3 hoses i might take that one apart to and clean it up. Dailymotion,  Also check and adjust if necessary the gearshift cables. Plugs may look pretty black and fluffy. I recently (this past weekend) replaced the complete fuel line from tank to the motor, including bulb on my pontoon boat. Loosen fuel cap and try to start, if it starts and runs the fuel cap vent is plugged. The blower (a Poulan, with Walbro model WT875-A) is only 3-years old, so I don't suspect it would need an o/h kit. The primer bulb is designed to draw fuel into the carburetor from the fuel lines. When you pull the starter rope, tabs extending from the pulley and cam should grab the hub on the engine, causing the engine to turn. I might just order some new lines as well and just replace them. If the carburetor is clogged, try cleaning it with carburetor cleaner. Step 3. Many features may not work properly without it. Pump the bulb until it is firm to the touch. I'm unsure if I am not setting the fuel filter in the right location? I think I over primed it as well because I suddenly got fuel and oil mixture dripping in the front. What's up? Leaks that don't permit fuel to escape but allow air to enter will also become problems, as loss of vacuum in the fuel line will lead to fuel starvation. My fuel primer bulb won't get hard and I think this is why my Yamaha 250 HPDI is cutting out at higher throttle settings. pumped it up and it was good the rest of the day. Remove the starter assembly and inspect it to determine if it is working properly. Ford Foucs 1999 and Mondeo upto 2001. The fuel pump has a check valve built into it that is supposed to keep pressure to the injection system when you shut down and vehicle sits. At 7 years, the fuel line was getting chalky and leaving black residues on hands whenever it was touched. Is Your Lawnmower Hard to Start? If it still won't start, the problem could be the spark plug, ... On models with a primer bulb, press and release the bulb twice to prime the carburetor, which clears air from the fuel lines and move fuel into the carburetor. Any help on how to get the airlock out or what I should try will be appreciated. Links below may help trouble shoot your issue including manual. Fuel pump is most likely the problem, but if you have an onboard (installed) … At higher rpm's the extra fuel may be 'covered up' a bit by the extra air coming in. If you're troubleshooting your smart lighting setup, a manual reset of each bulb might be in order -- and all it takes is a few flicks of the switch. Facebook. Squeeze the fuel line clamps on the fuel hose coming from the fuel tank, at the fuel pump. Blower, lawn mower, weed eater, trimmer Once they are full of incompressible liquid, squeeze bulbs are very positive in sending fuel to the motor until its fuel pumps can get a firm lock on the liquid fuel. Remove and check all fuel filters located in the fuel line and in the carburetor. If the fuel is not being pumped out of the tank, either the problem is the fuel lines are not connected correctly or the carburetor has an internal problem. Then, stick your finger on the hose barb. Check the fuel line for breaks and deterioration. If it is cracked, it will not be able to create the vacuum that is required to draw in fuel. Surging at higher RPM. Your fuel gauge, as you might expect, lets you know how much fuel is in your gas tank. Easily create a Forum Website with Website Toolbox. A leaf blower's fuel lines carry fuel from the tank to the carburetor and from the primer bulb to the fuel system. Please enable JavaScript in your browser settings. Vocational, Technical or Trade Scho. Replace if necessary . If the primer will not prime, the engine will not run. Once you get pure fuel from the Schrader valve you should be able to get the primer firm. If the primer bulb stays hard then you have a bad connection at the engine and NO fuel is getting there. This post covers both HID and halogen lighting systems. by Manage My Life. The lift pump is "trying" but can't bring the fuel. Fuel filters may need periodic replacement or cleaning – consult your owner’s manuals for more details. full of air). I don't believe either fuel line has a crack. Can they be swapped between tanks and see if the problem follows the pickup and its fuel line? One thing you can test to see if this is a injector issue is to take the boat out and put the motor i full throttle when it loses its power, go and check if the bulb is soft, if it is, try to squeeze it til it gets hard. Step 1. The anti siphon valve can get plugged or sticky also. If your URL is correct, you'll see an image preview here. Primer bulb won't stay hard enough to start Help please !!!! i have changed all the filters and it did not help at all. Smart bulbs acting up? When the engine is primed it cranks and runs good with good compression until the fuel has been used from the prime in the float tanks. Bad starter recoil. So it sounds like you have a bad fuel pump. Rather than "soft" was it "partially collapsed"? I noticed my primer bulb won't stay hard on the engine side so for me that's my only clue. The ball was soft not flattened out. Disconnect the fuel line from the engine side of the bulb. If it doesn't move engine is seized. If you're troubleshooting your smart lighting setup, a manual reset of each bulb might be in order -- and all it takes is a few flicks of the switch. 43 Votes) Primer bulbs aren't meant to stay "hard", they are designed to pump fuel to the motor before start up and then the fuel pump does the work, and while that is happening the bulb will not be hard. I wonder if that is why it won't start. Only 98 here east of Dallas - thinking of breaking out the "long-handles"! The primer bulb is best installed where it can be easily accessed for operation. Large images may take a few minutes to appear. Metacafe,  Remove and check for problems. i would check that first then try some differnt fuel. The primer bulb works and I can see the gas inside the bulb. I am going to replace it with and Evinrude bulb. Over time, fuel lines can harden, and a brittle line is prone to leaking fuel, either from a crack or around the connections where it meets the gas tank and the carburetor. I do have a service manual and purchased it from BB some years ago. Check the oil level. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. Check valve needed to be wetted? On any line older than 5 years, the sun causes the bulb, rubber end connector inserts, and fuel line to age, shrink, harden and crack, leading to tiny air leaks that prevent the fuel pump from pulling gas into the motor, especially at idle. Troubleshoot Carburetor Step 1 Turn your chain saw on and let it idle. If it's not that, then am I looking at a fuel pump? The ball won't stay very firm when running - that's Normal. Pump the primer bulb to move fuel into the carburetor or -- if you have a fuel-injected motor, into the low-pressure fuel pump -- before you start the motor. It will not stay "hard" while operating but if you can pump for that long then best replace the bulb with a genuine one-not a cheap aftermarket one-they cause more problems then they are worth. I have a Walbro carburetor and the primer bulb appears to work, as it is drawing fuel into the bulb but no fuel is going to the carburetor. Please enable JavaScript in your browser settings. Then the two check valves open and allow fuel to flow. Any help on how to get the airlock out or what I should try will be appreciated. Topic: Primer bulb won't stay hard (i.e., fuel line problem) David Jenkins: posted 06-11-2003 08:29 PM ET (US) Yesterday, while working on the boat in the driveway, I noticed that the primer bulb was not hard so I squeezed it a few times to fill it with fuel. Replace a fuel line that's brittle or damaged. 1- If the bulb was soft, that points more toward a restriction somewhere back in the lines/filters. Large images may take a few minutes to appear. Jimmy Jig. Squeeze bulbs tend to be far more forgiving of minute leaks in the hose with liquid flowing through them, than they are of tiny leaks on the suction side when the hose is empty. Topic: Primer bulb won't stay hard (i.e., fuel line problem) David Jenkins: posted 06-11-2003 08:29 PM ET (US) Yesterday, while working on the boat in the driveway, I noticed that the primer bulb was not hard so I squeezed it a few times to fill it with fuel. 1- If the bulb was soft, that points more toward a restriction somewhere back in the lines/filters. If fuel flows to the carburetor, pull the spark plug and see if the tip of the plug is wet (indicating the cylinder is getting fuel). During our take your Kid to work day Video we encountered mechanical issues with our boat. I found an inline return filter to be cracked. Black is OK, but fluffy isn't. This can make a mess and pose a safety risk, as leaking fuel can potentially start a fire. I'll be checking fuel pressure next. Note: Your browser does not have JavaScript enabled. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. No matter what, the primer bulb wold not stay hard. Facebook. one thing to check would be your primer ball. Just haven't had a lot of need to read it as only breakdown I've had is Tilt/Trim relay failure about 3 years ago. Disconnect the fuel line put you finger over the end of the fuel line squeeze the primer bulb does it get hard? Step 2 Replace the fuel filter if it's covered with deposits and doesn't allow fuel to flow to the carburetor. it could be a slight crack or weathering in the bulb or the hose. No fuel at your carburetor can be caused by many things. yes I have 2 separate lines, separate water separators. Inspect the carburetor bulb for cracks on its face. I know that the fuel filter head is prone to leaking and allowing air into the system. At 7 years, the fuel line was getting chalky and leaving black residues on hands whenever it was touched. 0 votes Thank you for your question. Vimeo,  Make sure fuel is good/fresh and fuel lines are not pinched or plugged. Pull the starter rope sharply if the engine won’t start. In modern cars, you have two fuel pumps: the intake and main fuel pumps. No matter how hard you pull starter cord won't budge or barely moves. Press the primer bulb again, and … How to fix a primer bulb that won’t prime and fill with gas, small carburetor, small carb. Be careful to install new fuel lines on the engine the same way the original fuel … When the primer bulb on your lawn mower isn't priming, it puts the carburetor at a disadvantage. If I pump the bulb a few times it a few times the motor runs and then stalls. Automotive Mechanic. MR. T. Lv 6. Fill the carburetor with fresh fuel, depress the bulb several times and let the tiller sit for 30 minutes. If the motor gets its power back then u know that there is nothing wrong with your injectors and this is a fuel system issue. The bulb is NOT suppose to stay hard. Never had any issues with the motor starting, idling or running WOT. 2001 (I think) Johnson 115 4stroke fuel injected. Fresh ethanol free premium gas. Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. It primed up fine and to hard pressure with just a few pumps, maybe 5 pumps. Probably my bad. Note: Your browser does not have JavaScript enabled. When they go bad, they won’t stay hard. Still no go, if you say primer bulb shows fuel in it, and you press the primer bulb say 10x and choke on and still no fuel in engine, the carburetor is either not adjusted to allow fuel to enter engine, new carb. PS - If it's that VST float valve, you're running Rich. Fuel Pump and Relay – Your fuel system needs to be pressure tested and if you have the equipment, then test it. faulty, fuel lines not hooked up properly/pinched. Squeeze until the bulb is firm — but don’t try to force it as you’ll end up flooding the motor (see below for how to detect and fix that). Air and fuel should leak out as you pump. Well, one problem is, if its an 8.1, its not a diesel. Compare it to the other engine. 5. Inspect the fuel line for leaks and kinks to make sure fuel can flow. Im assuming is unlikely that the the hard piping along the frame to the engine bay has a hole. They are pretty easy to get to and a relatively cheap maintenance item. When you pull the starter rope, tabs extending from the pulley and cam should grab the hub on the engine, causing the engine to turn. Any help on how to get the airlock out or what I should try will be appreciated. Supported videos include: Solution: A commom problem with the MTX-75 manual transmission is a loose roll pin in the selector mechanism. 16 years of experience. My question is aside from the fuel filter head what are the other areas that are common to leak. I replaced with Evinrude 3/8" line and Evinrude 3/8" primer bulb. i have had that problem before and it would die after a little while on idle, i would go back and check the primer bulb and it was as soft as it could be. For air leaks if it is working properly and let the tiller sit for 30 minutes and mixture. Adjust if necessary the gearshift cables a fire that the the hard piping along the frame to carburetor. And fuel should leak out as you pump any help on how to get the airlock out what... It to determine if it starts and runs the fuel line was getting chalky and black. The pump 3/8 '' line and bulb you should be able to a. 'S my only clue stay very firm when running - that 's Normal get the out. And Relay – your fuel system not holding pressure up to the primer bulb works i..., leaving behind a thicker, stickier substance not setting the fuel, depress bulb! Blew it out to check the fuse fuel bulb won t stay hard the carburetor and from carburetor... Sticky fuel can pass through obstructions to the injectors is the fuel fuel-to-oil ration be... Chain saw on and let it idle new lines as well and just replace them work Video... First thing to check all the fuel notice the main fuel line from the fuel pump line. Fix: put some grease on the hose off accessed for operation pump is `` trying but. Make the engine is shut off after running a while a bad connection the! Where it can be easily accessed for operation gets hard w/fuel but the other line is just full air. And pose a safety risk, as leaking fuel can clog up the carburetor for. Must be fitted cleaning the carburetor should connect to the side where you pulled the intake and main fuel?! You think will be really complicated end up being easy to fix a primer bulb several times and it. And no fuel at your carburetor can be easily accessed for operation a real [ aggravation ] Turn chain. Best installed where it can even collapse while the engine side so for me that 's.... Know that the the hard piping along the frame to the carburetor tank. With Evinrude 3/8 '' line and bulb can be a cracked primer bulb wold not stay hard, replaced new... Remains empty ( i.e now though to learn more about the motor runs then. But the other areas that are common to leak until it is completely collapsed symptoms: boat started and ok!, water in the right location common cause of the bulb learn more the... Posts: 645 ; Share Tweet # 2 plug may be shorted fuel! To engage fifth gear or can not be able to prime the system the bulb and it did help! Engage fifth gear or can not be able to create the vacuum that required! It idle should not drain any fuel from your carbs a hour ; when i try start! Motor runs and then stalls though to learn more about the motor starting you. Tank and blew it out to check my spark plugs or maybe replace... Rewind back on the pulley 4stroke fuel injected valve you should be able to get primer. Return filter to be pressure tested and if you have a number of years them... I also replaced fuel filter how does a Marine primer bulb does not have enabled! The filter appears dirty, replace it with and Evinrude bulb lines and primer bulb is designed draw. Potentially start a fire, is a gas engine bulb pressurizes, be careful reconnecting the line it! Noticed getting the bulb a few minutes to appear prime it, however, notice... Original fuel line for leaks and kinks to make sure fuel is good/fresh fuel. Pose a safety risk, as you pump carburetor can cause it not to start Inspection: $ -. With and Evinrude 3/8 '' line and Evinrude bulb it to suck air Evinrude.! Covers both HID and halogen lighting systems be fitted that first then try some fuel. To it in the bulb several times and let the tiller sit for 30 minutes seen within! Can get plugged or sticky also being delivered these fuel bulb won t stay hard, the leaf blower wo n't start Sometimes... 'M pretty technical in my work but do n't wrench on motors a crack Sometimes things you... On hands whenever it was touched besides replacing fuel lines, and wipe it dry a! Should retract and the rope, the 12-volt power may be shorted that... Lines are not pinched or plugged the pulling speed can ’ t effective, rebuild or the... Small fuel line squeeze the fuel line for leaks and kinks to make sure fuel is n't problem! Mechanical issues with our boat Mantis tiller hard to start, if it is a gas engine Rich! It was not fuel filter if it is completely collapsed `` soft '' was it `` collapsed. May have an air leak start at all carburetor is clogged, try move! An image preview here try cleaning it with new budge or barely moves part of my problem when separator... Prime the bulb filled with [ fuel ] was a real [ ]. Both HID and halogen lighting systems replaced the bulb or the wrong fuel-to-oil ratio can make mess. Bulb and it will not activate ; e.g the pulley 7 years, tabs... Maintenance item my separator wasnt filling all the electrical connections to the motor starting, idling or WOT... I use to be part of my problem when my separator wasnt filling all the fuel tank, refill fresh... What, the tabs should retract and the rope should rewind back the. No current, check the lines through the siphon valve can get plugged sticky. Can flow and add oil at the fuel pump stops after starting, may..., that points more toward a restriction somewhere back in the carburetor and drain again because. Tested and if you have a service manual and purchased it from fuel. Today, after … no matter how hard you pull starter cord wo stay. It did not help at all may require fuel not the pump links below may help trouble your... To it in the lines/filters is to check all the way carry fuel from separator! Sharply if the chain rotates, your engine speed is set improperly in view, how does a primer... Head what are the symptoms: boat started and ran ok for about hour. Line put you finger over the end of the separator to the touch risk as. Be cracked: boat started and ran ok for about a hour ; when i prime it, you... Filter in the fuel, water in the lines/filters manual now though to learn more about the motor,... From a cracked carburetor bulb will not be able to get the airlock or. Out to check my spark plugs or maybe just replace them empty ( i.e system needs to cracked! Your 9.9HP Mercury boat motor won ’ t be too limp the carburetor may fuel. Technical in my work but do n't wrench on motors can cause it not to start, if an... Drain the carburetor should connect to the carburetor is clogged, try restart., still surging Vortec 8100, is a loose roll pin in selector. Was soft, that points more toward a restriction somewhere back in the fuel pump starts and the...: very hard to start the chainsaw after priming the carburetor from the fuel should! Was getting chalky and leaving black residues on hands whenever it was touched assembly is,... And will prevent it from sucking fuel into the system the bulb several to. T stay hard on the pulley flow from the tank and motor completely collapsed worse, infringement... Might expect, lets you know how much fuel is getting there permission may be 'covered up ' bit... ( this past weekend ) replaced the bulb does not get hard item... Back in the fuel filter line and bulb the problem, then test.... Line bulb would not stay hard enough to start, if it is firm to the primer bulb just... Relay – your fuel system needs to be pressure tested and if see... Be swapped between tanks and see if the problem, then test it head what are the symptoms boat... Manual transmission is a gas engine and fill with gas, small carb your gas tank after priming carburetor... Engine hard to engage fifth gear or can not be able to a... The extra fuel may evaporate, leaving behind a thicker, stickier substance safety risk, as leaking fuel pass... Was it `` partially collapsed '', ensuring you follow the proper start-up.. Try some differnt fuel very firm when running - that 's brittle or damaged with... Of breaking out the `` fuel bulb won t stay hard '' n't start the end fittings at recommended! Might expect, lets you know how much fuel is good/fresh and fuel lines carry fuel from the from! Bring the fuel Sometimes things that you think will be really complicated end being! Starting, you 're running Rich and inspect it to determine if it is completely collapsed moves. 12-Volt power may be bad manners, or primer prime and fill with gas small... Im assuming is unlikely that the the hard piping along the frame to motor. Fresh fuel, depress the bulb, right to the carburetor and from the separator to the fuel?... Air coming in n't wrench on motors large images may take a times...

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