1989 Yamaha proV 150 losing power around 5000 RPM

Cdnickles12

Recruit
Joined
Aug 4, 2016
Messages
1
I have a great running 89 Yamaha pro v 150. Never had a problem out of it until all of a sudden I was running and reached 5000 RPM and the boat "lugged" and dropped back down to 4000 RPM. The boat usually runs between 58-60 MPH, but now will only go 50 secondary to the loss of power at top end. I checked compression and each cylinder reads 105. Changed spark plugs, fuel filter and made sure gas was good. Took the boat back out and it has the same issue. Any suggestions?
 

99yam40

Fleet Admiral
Joined
Sep 7, 2008
Messages
8,851
fuel pumps maybe
cannot keep enough fuel for top RPMs
My guess anyway
 
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