SEEDOO RX-DI with a 951 Rotax just replaced both pistons ,rings, & rave valves and just took out front cylinder for the 2nd time during break in procedure
could this be a computer or injector problem ?
thanks

Is It Still Oil Injected Or Did You Delete It, And Is It Scoring The Pistons Or Burning Holes In Them, Check Your Oil Tank For Water, Prolly Have A Oiling Problem.

still INJECTED !! pistons are scoring,and cleaned and washed out oil tank and put fresh quicksilver pwc synthetic during rebuild and its only the front cylinder that keeps doing it .oil pump tested fine as well

Sounds like that cylinder is lean.

air leak in the motor somepalce making it lean, OR you have a water leak and are washing the cylinder down with water.

OR what pistons are you using???? if your using wiseco or similar and NOT OEM you have to change bore size to deal with the different expansion rate.

Mabe a crank seal on the mag side? Was the oil pump bled? Oil pump cable adjusted right?

Shoot me a PM with your email addy.. I have a shop in Elkhart and will help you out if we can...

YUP... GET WITH TEAMSYNERGY FOR SURE! He know's them sea doo's!!!

If you could, along with sending me an email, snap some pics of the dome and skirts of the hurt piston. Also the cylinder wall as well. How does the other piston look? is it scoring as well? What about the crank connecting rod, how does the rotational swing feel while holding the rod and spinning the crank over? Again, feel free to PM you email.. I have sent you my contact info this AM...

other piston looks like brand new still,and the crank and rotating assembly rotate perfect .just got your P.M. and will give you a call.
thanks