davidpriolo
New Member
1997 gtx 787 my ski runs fine for about 10 minutes then starts surging from 6000 rpm down to 4000rpm back and forth. I have changed all the grey fuel lines ,all the filters , cleaned the rave valves, replace the fuel knob, and fuel sending unit($200+) readjusted the carbs ... I just did a compression test, the front cylinder get up to 155psi and the rear gets to 135psi is that a big difference and can that cause a surging problem??? Also one of the air vents under the rub rail fell into the hull cavity and is not set back in the gromet correctly is that a big issue? Any ideas would be helpful Thanks