96 HorizonRX 4.3L GL Volvo Penta Fuel Problem

[kagr80000]

Ok got a strange problem I need some help with.
My 1996 Horizon RX with a 4.3GL Volvo Penta is acting up and I suspect a fuel problem in the making.

Boat starts up fine when we put it in the water and we can run for hours with no problems at all.The problem happens after we have been running for awhile and shut down and float around for an hour or so.
Engine starts right up with no problem until I give it full throttle and boat gets up on plane then just dies.(runs out of gas) Takes forever to get restarted but when it does you can run full bore with no problems until the next time you stop and float around.

Im thinking the fuel pump relay may not be working all the time.So now I am ruling out a bad electric fuel pump since the boat runs fine when it is running.

Any thoughts of other problems causing this

Thanks K

 

[kagr80000]

Re: 96 HorizonRX 4.3L GL Volvo Penta Fuel Problem

Well turned out to be a bad 1 way sifon valve at the fuel tank.

 

[njlarry]

Re: 96 HorizonRX 4.3L GL Volvo Penta Fuel Problem

Thanks for posting the follow up.
Did turn out that was the only problem?
Interesting that the valve would misfunction intermitantly like that but it makes sense with the effects.