'03 Supercharged GTX Loses Power

[dingo8baby]

I was on the ski yesterday and at max RPM the engine power cut out but the engine remained on. I limped back to the dock and changed the plugs and was good for another 15 minutes or so at mid range RPM cruise but once I had it at full RPM range for less than a minute it dropped out again. As I was idling back to the dock you could hear and feel low toned thump (You could hear the thump after the first time it happened before I changed the plugs also but it went away after the change).

Any suggestions or help would be greatly appreciated.

Thanks!
D8B

 

[seadoo GTS 1993]

How many hours on ski?

Possible SC problem?

 

[dingo8baby]

It's got 145 hours. This is the first time the plugs have been replaced.

 

[seadoo GTS 1993]

ur suposed to have supercharger rebuilt eevry 100 hours, bettin that thats the prob.

 

[dingo8baby]

Ouch. Sounds like a pricey proposition. Is there a chance it could be a plug coil? Thanks for your reply.