'03 GTX DI with low hours, losing top end power

[kurtza]

Hi Everyone, I've had my GTX DI for about 4 years, but have never tried tinkering with it on my own before, until I found this site. The DI has a little over 60 hrs on it, half salt, half freshwater.

Last year I noticed a significant dropoff in top end speed, capping out around 45 mph, whereas 4 years ago when I bought it it easily hit 55-59 mph.

Compression is around 150, impeller is new, o-rings are apparently in good shape (at least that's what the repair shop tells me).

Does anyone have any advice?

 

[robin savell lloyd]

If I had the money I would take it to only a extremly high qualified mechanic that knows the ins and outs about the di models. I may be wrong but if this machine is not running correct you may be adding further damage to it. Like I have said I may be wrong. also look online every where and find out all that you can on the di model like what gas you should be running as that may be an issue but I can be wrong. good luck Robin :cheers: