Ask Your Own Boat Question. Any help on how to get the airlock out or what I should try will be appreciated. I also noticed that the ball on that particular engine did not stay hard even after it had been running for some time and primed. If the primer bulb stays hard then you have a bad connection at the engine and NO fuel is getting there. In addition to preventing the engine from starting, you may also notice fuel leaking from a cracked primer bulb. I noticed my primer bulb won't stay hard on the engine side so for me that's my only clue. Good luck. The 8.1, or Vortec 8100, is a gas engine. Metacafe,  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. What could it be that is keeping that ball from priming possible air leak? Automotive Mechanic. 0 votes Thank you for your question. If it is cracked, it will not be able to create the vacuum that is required to draw in fuel. Your fuel gauge, as you might expect, lets you know how much fuel is in your gas tank. 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. With the starter recoil removed. Fuel line bulb would not stay hard, replaced with new. 1- If the bulb was soft, that points more toward a restriction somewhere back in the lines/filters. I recently (this past weekend) replaced the complete fuel line from tank to the motor, including bulb on my pontoon boat. Inspect the fuel filter for blockage or discoloration. Never had any issues with the motor starting, idling or running WOT. Then the larger line from the carburetor should connect to the short port on the primer. Step 2 by Manage My Life. The lift pump is "trying" but can't bring the fuel. one thing to check would be your primer ball. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor. Two separate pickups in the fuel tank? It could be a simple issue like a fuel filter plugged so tight that no fuel can pass through. Check the fuel line for breaks and deterioration. I found an inline return filter to be cracked. 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. Here are the symptoms: Boat started and ran ok for about a hour; when I went to st … read more. Inspect the fuel line for leaks and kinks to make sure fuel can flow. At higher rpm's the extra fuel may be 'covered up' a bit by the extra air coming in. I replaced the bulb and it will not get hard. Give your feedback by voting on answers. There may not even be signs of leaking, since a fuel line leak on the tank side would have to be above the fuel level for leakage to show. Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. Still not filling with gas! 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. 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. 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. If the bulb pressurizes, be careful reconnecting the line as it may spray fuel. 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. I might just order some new lines as well and just replace them. If your URL is correct, you'll see an image preview here. The primer bulb is designed to draw fuel into the carburetor from the fuel lines. I replaced with Evinrude 3/8" line and Evinrude 3/8" primer bulb. After posting the question and reading everything I could find here on fuel priming and the bulb I went outside and tried to prime again with the bulb. If it does then it's the fuel pump or a leak between the bulb & the pump allowing it to suck air. The fuel bulb is soft. It is a cheap fix to replace a 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. 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. i have changed all the filters and it did not help at all. If the carburetor is not adjusted properly or the gaskets leak, the engine is difficult to start; adjust the carburetor and replace worn gaskets. Please enable JavaScript in your browser settings. If the adjustment is ok, a new revised selector mechanism must be fitted. What's up? My question is aside from the fuel filter head what are the other areas that are common to leak. 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. Easily create a Forum Website with Website Toolbox. No matter how hard you pull starter cord won't budge or barely moves. Won't Stay Running. Blower, lawn mower, weed eater, trimmer faulty, fuel lines not hooked up properly/pinched. Also check and adjust if necessary the gearshift cables. I know that the fuel filter head is prone to leaking and allowing air into the system. 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. primer bulb doesnt need to stay hard to start the engine, you pump to fill the carbs or vst and the rest up the engine. Loosen fuel cap and try to start, if it starts and runs the fuel cap vent is plugged. This troubleshooting guide will help you determine why your 9.9HP Mercury boat motor won’t start. Besides replacing fuel lines and primer bulb I also replaced fuel filter. Engine is seized. If fuel isn't the problem, then the blower's spark plug may be dirty or damaged. The lines have a number of years on them. 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). YouTube,  First thing to replace is the bulb, right? Problem: Very hard to engage fifth gear or cannot be engaged at all. Smart bulbs acting up? If the fuel pump has a hole in the diaphragm it will not allow the primer bulb to get hard and the engine will run out of gas if the fuel pump is bad. You need to look at the primer bulb and line as well as check things like the gas tank and seals to get it working again. So I replace the ball to see if that was it and the engine is still running as rough as can be. Fresh ethanol free premium gas. Plugs may look pretty black and fluffy. Solution: A commom problem with the MTX-75 manual transmission is a loose roll pin in the selector mechanism. Fuel lines become brittle over time and can crack or break. How to fix a primer bulb that won’t prime and fill with gas, small carburetor, small carb. Watch the Fuel Filter. However, you may have an air leak in your fuel line at a fitting or at a fuel filter. Another logical cause could be the fuel pump. IS YOUR Briggs and Stratton engine Priming correctly? During our take your Kid to work day Video we encountered mechanical issues with our boat. If you squeeze and the bulb stays … PS - If it's that VST float valve, you're running Rich. This post covers both HID and halogen lighting systems. I pulled it out to check the issue. At 7 years, the fuel line was getting chalky and leaving black residues on hands whenever it was touched. New of these 3 didn't change anything. Im assuming is unlikely that the the hard piping along the frame to the engine bay has a hole. I replaced the bulb and it will not get hard. A defective fuel gauge can be a symptom of several problems such as a blown fuse, a broken circuit in the dash panel, or a fractured float -- the part attached to the sending unit in the intake fuel pump. Thank you!,,,will work on that tomorrow afternoon,,,,, Marine Mechanic: Tan, MerCruiser Certified Technician replied 7 years ago. With the arrow pointing to the side where you pulled the hose off. Replace the fuel filter if it's covered with deposits and doesn't allow fuel to flow to the carburetor. I noticed getting the bulb filled with [fuel] was a real [aggravation]. In most pre-rigged boats being delivered these days, the primer bulb is seen located within 12-18 inches of the engine. If the snow blower won’t start up, wait an hour or two to allow the fuel stabilizer more time to dissolve residue, and then try again. Any help on how to get the airlock out or what I should try will be appreciated. Remove the starter assembly and inspect it to determine if it is working properly. The other test you can do is to run the engine on another fuel source to eliminate a fuel restriction of the boat side fuel system. When they go bad, they won’t stay hard. 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. New one won't stay hard either, still surging. Starter recoil is just jammed or actually broken. They are pretty easy to get to and a relatively cheap maintenance item. Dailymotion,  I'll be checking fuel pressure next.

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