98 Speedster RAVE Question?!??!

[diabloflash]

98 Speedster (787 Engines) Can a damaged RAVE (broken Sea Doo Exhaust Rave Valve Piston) cause compression issues? Did a compression test and One of my engine has 150PSI and 120ish (120 is the cyilinder closest to front of boat). Wondering if its the RAVE?
Engine likes to run sometimes great and sometime like now not at all....

Also what is a good compression number??

 

[mikidymac]

A broken valve won’t affect compression unless it hit the piston.
150psi is perfect anything under 120 or more than about 5psi between cylinders and it’s time for a rebuild.