Fuel in engine oil and bogging down at high RPM's

[AJK737]

2004 Volvo Penta 5.0 GL-D

Some time ago I posted a thread about gas in my engine oil and overheating at high RPM's. Well, after changing impellers, thermostat, tightening hose clamps, checking risers, etc, the overheating at high RPM problem turned out to be a leak in the water intake in the lower unit. Unfortunately, I had to take it to the shop to figure that one out$$$$$$$

On another note, the shop could not find a problem with my carburator or the fuel pump regading the fuel in the oil problem. They gave it a tune up and changed the distributor cap and said give it a try. We lake tested it today and found it ran great up to about 4000 RPM's, then it began to bog down a bit (you could feel it and hear it). Reduce the RPM's and it runs great again. Did this for about thirty minutes, and once again we have fuel in the oil. We could smell it and the oil level rose about 1/4 to 1/2 quart.

Any ideas? About the only thing I can think to cause this would be a bad carburator? Other thoughts? Could bad fuel cause this?

 

[miamitech]

Re: Fuel in engine oil and bogging down at high RPM's

if you are using an automotive style fuelpump, the diafram fails and lets gas into the crankcase

 

[Glastron_V210]

Re: Fuel in engine oil and bogging down at high RPM's

2nd that ^. It's the only place the two come together.

C

 

[Maclin]

Re: Fuel in engine oil and bogging down at high RPM's

In the last thread about this it was mentioned that this engine would have an electric fuel pump if it is still as-shipped from Volvo.

AJK, do you know if you have an electric fuel pump or mechanical?

 

[AJK737]

Re: Fuel in engine oil and bogging down at high RPM's

Factory electric fuel pump.

 

[Don S]

Re: Fuel in engine oil and bogging down at high RPM's

EDIT: Disregard,
Why do you have 2 threads going on the same subject? This thead closed.