98 Seadoo Speedster - Power issue w/ one engine

[luther2050]

We have a 1998 Speedster. The engines start and run fine in idol, but one engine has no power when increasing the throttle. We noticed some oil coming from an area by the pistons. Brought the part to the store and was told it was the exhaust value piston. We took the part from the other engine and put it on the bad engine. Still not getting any power. Could the exhaust value piston being bad have caused something else to break? Any ideas what the problem could be?

 

[TJ198]

Will the engine rev, or does it die when you hit the gas?

 

[luther2050]

It revs, does not die. You have to go about 1/2 throttle to get it to rev.