Compression for '89 130hp Yamaha

viccap

Recruit
Joined
Mar 21, 2001
Messages
2
Just had my engine compression checked....#1-146, #2-156, #3-136, #4-143. Motor runs great. Easy start, yet does "shimmy" a bit at in idle and up to 1100 rpm. Motor is used with about 450 hours, but has been maintained religiously. Always winterized and spring started by service center.<br />Question : Mechanic says not to worry, no problem with the #s. BUT , I AM concerned because everything I have read says not to exceed 15 pound difference between cylinders. So~ am I just a worry wart?<br />And thanks for your help... I read these board regularly and have learned so much ! Thanks again !!
 

Trent

Captain
Joined
Nov 17, 2001
Messages
3,333
Re: Compression for '89 130hp Yamaha

I would not worry about those numbers. Run some decarb thru it if your worried and recheck the compression in a few hours. No worries mate.
 
Top