Mariner not getting rmp's in gear

[shelbik]

When in neutral my rpm's are fine, once boat is in gear I am not getting enough rpm's and will only run about 30 mph.<br />Motor is either an 85 or 86 200HP outboard Mariner<br /><br />any ideas would be a great help!<br /><br />Tk

 

[Moody Blue]

Re: Mariner not getting rmp's in gear

Not enough info shelbi. Can you provide more details ? Boat, prop, symptoms etc. 30mph would be good if it was pushing a 26ft 12000Ib boat.

 

[shelbik]

Re: Mariner not getting rmp's in gear

18ft Skeeter bass boat, 3 blade prop Getting 2000 rpm's when in gear and in water. When in neutral I am getting all the rpm's I need.

 

[wilde1j]

Re: Mariner not getting rmp's in gear

Revving engine in neutral tells you nothing, other than the engine will run. Under a load is what counts. How do you get 30 mph at 2000 RPM? Most boats need over 3K RPM to plane. What RPM did you used to get?<br /><br />Carb or EFI?<br /><br />Have you checked the fuel system from the tank to the fuel pump for leaks and/or obstructions? Have you checked the fuel pump?

 

[Moody Blue]

Re: Mariner not getting rmp's in gear

Shelbi revving your motor above 1500-2000 rpm without a load (neutral) runs a good risk of it tossing parts through the block. I also am wondering how you achieve 30mph at only 2000rpm. What prop are you running ?