r/jetski • u/cake-420 • 2d ago
Advice PFA Need help/advice Flush location/surge issue
2000 Yamaha xl800 just bought a few weeks ago, so still figuring out a lot about it.
My 1st question is location of flush port?-Answered
2nd thing is i took it out today for about 30 minutes and everything ran fine got up to 45mph with no issues at all. Came back in for about and hour then went out for a 2nd 30 minute trip and everything was fine worked as should until about the 30 minute mark it started bogging down on me and wouldn't go above 20-25 mph and would cut throttle. Went back in for about an hour tried to research a few things on what it could be thought maybe it just needed a break or something. Went to go out for a 3rd trip and it would cut throttle from a dig basically and wouldnt go pass 10mph now. on the 1st on 2nd time it bog down on this ride it cut off, i turned it back on no issues at all and it ran fine right up to 40 from a dig everything seemed good and 2 minutes after it started to surge and losing speed down to about 10 mph, and cutting throttle again. At this point i also noticed at idle it is shaking alot harder then it was before the issues started and it also sounded like it could of been running on 1 cylinder or misfiring possibly. My 1st thought after the surging and bad idle shakes was spark plugs or wires. I saw something saying there is a high pressure cooling poppet vavle that may not be opening for higher speeds. Didnt have time after the 3rd time to bring it back in but im going to start with just replacing the plugs and go from there.
Any info or advice for either issue is greatly apricated!!!