My yamaha F250 stalled three times and won't start again for three times in recent weeks. I have replaced a new fuel filter and a new water separator. The prime ball won't harden to bring fuel to the fuel filter. I saw bubbles in the fuel filter when I tried to pump the fuel using the prime ball. Did anyone had this issue? I called Grady white dealer. They said I need new set of fuel lines. Please let me know what's wrong with my engine. Thanks.
2007 Gulfstream 232 Yamaha F250 stalled while trolling and cruising
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Sardinia306Canyon
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What year F250?
The fuel filter in front of the engine, under the cowling?
What kind of water separator did you installed? Clear bowl or full metal cartridge?
The F250's installed on my Venture 34 did the same, just died at planing speed, but restarted immediately.
I replaced them before i found out what the problem was.
When you have replaced fuel filter and installed a new water separator prior to having problems than there is most likely the problem, a mistake when installing it.
Double check if you made a mistake when installing either, you may cracked a original, old fuel line when connecting them to the new water separator, or there is a air leak elsewhere.
Just in doubt, if fuel hoses are of unknown age, just replace them in any case.
Chris
The fuel filter in front of the engine, under the cowling?
What kind of water separator did you installed? Clear bowl or full metal cartridge?
The F250's installed on my Venture 34 did the same, just died at planing speed, but restarted immediately.
I replaced them before i found out what the problem was.
When you have replaced fuel filter and installed a new water separator prior to having problems than there is most likely the problem, a mistake when installing it.
Double check if you made a mistake when installing either, you may cracked a original, old fuel line when connecting them to the new water separator, or there is a air leak elsewhere.
Just in doubt, if fuel hoses are of unknown age, just replace them in any case.
Chris
Hookup1
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You should fill filters with fuel before putting the up. Make sure o-ring which should have been replaced is in place on engine filter. Replace fuel bulb-only good for a few years. May be fuel lines.
if you see bubbles in the clear fuel filter when you squeeze the primer bulb, it means you are sucking air. The first two places to look are the onboard fuel filter to make sure it is seated correctly. The second is the water separator/fuel filter again to check that the filter is seated correctly. Sometimes gasket material sticks to the underside of the flange and prevents the new gasket form seating correctly
Thank you all for the replies. I have tried to fill the fuel filter cap and water separator. It would run for a bit and then it stalled again. I tried to start again and it would not start. I have no fuel leak in the fuel lines from what I can see. I did not smell gas leak either.
Mustang65fbk
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As mentioned... bubbles in the fuel would make me think air is getting in through the fuel lines. My uncle's boat had a similar issue years ago where the fuel lines had pinhole leaks in them and would stall the engines as well. Replacing the fuel lines was the golden ticket and ended up resolving his situation. I'd start with doing that first as it's a relatively cheap and easy option, if you continue having issues then continue on from there.
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In the scenario I talked about you wouldn't have a gas leak, you have an air leak from the outside air into the fuel system.
When the motor is running, it creates a vacuum that sucks the gas from the tank to the motor. If there is an air leak, it sucks air instead. I can't tell for certain if that is your problem but air bubbles in the clear filter can be a sign of an air leak.
When the motor is running, it creates a vacuum that sucks the gas from the tank to the motor. If there is an air leak, it sucks air instead. I can't tell for certain if that is your problem but air bubbles in the clear filter can be a sign of an air leak.
We can't tell you exactly what's wrong any better than your dealer can - we're not there to investigate things. YOU need to do some hands on investigation yourself if you don't want to take it to a mechanic.
About all we can tell you is that the problem is ""most likely the fuel bulb, the gas line from bulb to tank, the AS valve, the vent hose, or the hull vent. Focus on that and figure out which one is the culprit.
About all we can tell you is that the problem is ""most likely the fuel bulb, the gas line from bulb to tank, the AS valve, the vent hose, or the hull vent. Focus on that and figure out which one is the culprit.
If you have an antisiphon fitting on the tank check that. Had a problem with mine, same symptoms. If I cracked the fuel filter loose it would run for a while then stall again. Mine was an I/O and I believe they require antisiphon fittings not sure if they are fitted to outboards. Reaplaced the fitting and all was good after. Mine was located at the tank fitting with a barb on the end of the fitting, fuel line to the motor connected there. YMMV
If your engine is a 2007 there are two other fuel filters to consider. An LP filter and a filter in the vapor separator tank (VST) just before the HP pump. That VST filter is a common source of the problem you describe, but not easy to replace. I recommend you (or your mechanic) drain the VST tank into a glass jar via the drain hose to look for water or other contamination.
Can I ask why you discounted the dealer's suggestion about the fuel lines? I once had a fuel line that de-laminated and the inner lining collapsed, causing fuel starvation. I wonder if the dealer has been experiencing this problem?