loss of RPM on volvo penta 5.7 GXI

[virtual256]

I have a problem with the engine volvo penta 5.7 GXI 2003. For some time RPM does not increase on the move above 2600 and the boat does not go fast. Oil pressure and engine temperature shows the norm. Turnover in the parking lot above 4500. To diagnose problems was bought CodeMate Tester - MEFI Code Reader, but it showed no error codes. In what may be the problem?

 

[Don S]

Re: loss of RPM on volvo penta 5.7 GXI

Which 5.7GXi do you have

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[virtual256]

Re: loss of RPM on volvo penta 5.7 GXI

I have the engine Volvo Penta 5.7 GXI-C. In one of those read about replacing the oil switch. That's only if it helps?

 

[Volvo Mike]

Re: loss of RPM on volvo penta 5.7 GXI

I have the engine Volvo Penta 5.7 GXI-C. In one of those read about replacing the oil switch. That's only if it helps?

2003 would be the C motor. I would be interested to see what kind of pressure your hi pressure pump is putting out. Those original pumps for those gas engines past 98-99 have been known to have issues, falling flat on its face like that at the higher rpms leads me to think it could be that fuel pump. Typically when they go they do make quite a racket, squealing and such but I have seen some go bad that hadn't made a peep. hope this helps.


Mike