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Fuel starved


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I have a 1991malibu euro f3 5.7 bluewater. When I put fuel line in 5 gallon gas canister it runs fine. When I hook up fuel line to fuel filter it will not run. I have taken pickup tube out and run fuel line direct from gas tank, with fuel screen on the end. I have blown out the lines. I have changed the fuel line (size of oil filter) filter. I have replaced the fuel lines. Take fuel line off fuel filter and put in 5 gallon gas can works! Put back on fuel filter fitting that runs back to fuel tank ( directly into tank ) engine dies. Any idea what the problem is?

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How does the vacuum line from the carb to the fuel pump look? I would start there then the pump itself. It sounds like you have done everything else. Also a little out there but check the fuel tank vent.

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Thanks. I will. Already checked fuel vent. Took fuel line to vent off as well as line that fills tank. Can you have to much ventilation?

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Thanks. I will. Already checked fuel vent. Took fuel line to vent off as well as line that fills tank. Can you have to much ventilation?

I don't think these tanks are pressurized so no you can't have too much. Is the fuel in the tank good? There is also a screen on the intake of thefuel filter IIRC. Also check for a screen in the tank, I am not sure if there is one there or not. There is also one on the intake of the pump but if it is pulling from a 5gal can is should pull from the tank.

Keep us posted as to what you find.

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Punched check value out at tank. Have not taken fuel pump off because it's been on 8 months with less than 2 hrs on it. I plan on taking off and inspecting.

Checked screen on tank. I even ran fuel line directly into tank just to see. There are particles in tank but don't see how that could clog line.

Thanks for input. It may be time to take to real mechanic.

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  • 2 weeks later...

It was the fuel pump. Now carb overflows because of "pepper" like trash. I have visions of boating...someday.

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