Yamaha 5C compression

[JohnRudeMan]

Just did a compression test on my low hours 1992 Yamaha 5C (5hp single cylinder 2 stroke). I got 140 PSI (cold motor, WOT). I think 140 PSI is great, but I don't know what they had when they were new. Anyone who knows if the compression of my motor is good?

Thanks in advance!

 

[99yam40]

never even knew they made a 5 HP , but it sounds good to me.

also never saw where Yamaha had any specs on compression, so you will have to hope someone with a motor like yours reads you post and can test theirs to see

but finding out what it was new is probably not going to happen