1990 60 HP changed power pack drop in RPM?

Shawnsgarage

Cadet
Joined
Apr 16, 2012
Messages
15
Is it possible a new power pack would cause a drop in WOT Rpm? Runs great...just only getting about 5000 rpm now ...and I'm sure I was getting 5500 before? Anyone ever have this issue? Or know how to tune it back up ?
Thanks
 

gm280

Supreme Mariner
Joined
Jun 26, 2011
Messages
14,585
If you were getting 5500 RPMs previously, why did you change the power pack out? Something doesn't make sense there to me. JMHO :noidea:

Need more info. :decision:
 

Shawnsgarage

Cadet
Joined
Apr 16, 2012
Messages
15
(The power pack had failed and was changed due to a loss in spark on one cylinder)

Prior to the power pack failure, I use to get up to 5500 RPM and around 30 + MPH . Now I am only getting around 5000 RPM and 26MPH approx... ?
(It is running on all 3 cylinders now)
Just wondering if something with the new PP has caused this .... or if I need to tune something timing wise ? It runs great on idle and at WOT , just doesn't have the RPM like before.
Thanks
Shawn
 
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