Top end stutter

Jacob044

Cadet
Joined
Dec 27, 2009
Messages
13
I think I know what my problem is BUT I would like to hear from those of you who know engines. My 1993 Johnson 48 SPL runs good EXCEPT for top end. It has a rythmic stutter. I might assume this is rev tach?? It seems to be electronic in nature and not fuel related. Maybe I have the wrong prop on? Too high of revs at full throttle? When I throttle down a little, it stops. Can you assist?? Thanks, Jake
 

Haffiman

Commander
Joined
Dec 17, 2009
Messages
2,454
Re: Top end stutter

Check you rpm.
Most likely the rev limiter getting activated.
Go UP 4" in prop pitch.
 
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