1997 Yamaha 90hp rpm issue

rpmichels

Recruit
Joined
Apr 20, 2006
Messages
1
Hello ALL!<br />I am new to the board and no outboard expert but any help would be greatly appreciated. I have a 1997 90hp jet drive yamaha that is slowly losing rpm's over time. I purchased the motor a year ago and it was running strong at 5300 rpm. Over time the max rpm under load has dropped to 5000 rpm and seems to have lost a little bit of speed. I am wondering if anyone out there could give me advice on were to start troubleshooting or maybe even experienced this themselves.<br />thanks,<br />rpmichels
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: 1997 Yamaha 90hp rpm issue

has the hull gained any weight in the past year?<br />has it gained any barnicles or other growth ?
 
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