Idle RPM?

valencehsift

Seaman
Thread starter
Joined
May 3, 2007
Messages
70
Just out of curiosity, what is the ideal RPM at idle in neutral. Mine is at about 900, is that a bit high? 1989 Force 150
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,970
Re: Idle RPM?

Thats about right, maybe you can go down a bit.
More important is how it idles when in gear.
600-700 in gear is good.
 

Frank Acampora

Supreme Mariner
Joined
Jan 19, 2007
Messages
12,004
Re: Idle RPM?

Remember: If you change the prop to a different pitch, the load in gear will also change and the idle speed will most probably need to be adjusted. I have a 125 with a 19 pitch prop. In order to get 700 RPM in forward, the neutral RPM is up around 1,000. With a 17 pitch prop, neutral RPM is about 900.
 
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