90 hp force

[DV]

Can anyone tell me how many gph a 1994 90 hp force should be getting

 

[dwco5051]

Re: 90 hp force

The old rule of thumb is to divide the horsepower by 10 and that is what you would get running at wide open throttle. That would relate to 9 gph for that engine. That is a rough estimate and can be improved by finding the sweet spot on your particular boat. Usually about a hundred rpm more or less over what it takes to keep it on plane.

 

[mitchbuck]

Re: 90 hp force

I have a 1990 90hp on a 17 proline CC and get about 2.2-2.7 mpg while cruising at ~18knts depending on number of crew and load. Drops to around 2 over 20knts and max out just under 30kts. Its a pretty beefy and heavy 17fter though more like an 18fte

 

[jerryjerry05]

Re: 90 hp force

Not sure about GPH.
I have twins and it gets about 2.2 miles a gallon.
That's overall performance.
Some running at 3800-4400 about 25-6mph and slow running looking for fish.