what is normal PSI on 1999 fuel injected yamaha ?
 

Looking for factory spec. or close, also confused about measuring with plugs in or out of all cylinders??Thanks in advance!

Re: what is normal PSI on 1999 fuel injected yama
 

I think Art at BRP tech said production motors were 90- 130 for my 96 150. What you want is even comp.< 5% low to high all plugs out + motor cold. Others here can be of more help.

Re: what is normal PSI on 1999 fuel injected yama
 

Compression or fuel pressure?

Re: what is normal PSI on 1999 fuel injected yama
 

good point, and question, Was looking for Cylinder Compression, I believe fuel pressure is 35 psi. Sorry for the confusion

Re: what is normal PSI on 1999 fuel injected yama
 

I had a 1988 2.6L 200 that had 115psi - 120psi in all 6 cylinders. I know it's not the same motor, but it's the same 2.6L block . . . As far as testing the compression . . . you want to remove all the plugs. This allows the starter to turn the flywheel faster (not compressing the other 5 cylinders), so you get a more accurate reading.