Fuel problem, please help.

Try this troubleshooting procedure. Disconnect the fuel supply hose at the engine. Connect it to a clear plastic hose then connect the other end of the clear hose to the engine. Start the engine and look for signs of air bubbles indicating that you are sucking air somewhere vice solid gas. I used this procedure before to find the same problem. My problem was the clamp holding the vaccum hose to the pulse limiter on the crankcase had come loose. I did not have enough vaccum at high speed to suck enough gas to the fuel pump(in my case not enougn vaccum to the VRO) when trying to get on plane. If you see air bubbles then troubleshoot from there. Also try an external tuel test tank also with a clear hose to eliminate your built in fuel tank and hoses an a source of the problem.

wwatterson
1987 Wellcraft V20 Fisherman with original Sea Drive

[spareparts]

used to be, you hardly every went into the VST, now it seems like an anual occurance. I've all kinds of rumors about whats causing teh trash and why it gets past teh filters, best thing to do is runa good water separating filter, and change it often. I've seen some shops install a suzuki high pressure filter between the vst and the injector rail, it seems to help

[THEFERMANATOR]

Originally Posted by wwatterson

Try this troubleshooting procedure. Disconnect the fuel supply hose at the engine. Connect it to a clear plastic hose then connect the other end of the clear hose to the engine. Start the engine and look for signs of air bubbles indicating that you are sucking air somewhere vice solid gas. I used this procedure before to find the same problem. My problem was the clamp holding the vaccum hose to the pulse limiter on the crankcase had come loose. I did not have enough vaccum at high speed to suck enough gas to the fuel pump(in my case not enougn vaccum to the VRO) when trying to get on plane. If you see air bubbles then troubleshoot from there. Also try an external tuel test tank also with a clear hose to eliminate your built in fuel tank and hoses an a source of the problem.

wwatterson
1987 Wellcraft V20 Fisherman with original Sea Drive

Using clear hose to look for air bubbles isn't the best test anymore. With E-10 fuel it can generate air bubbles in the fuel on a hot day now.