Hello, Iv searched many of the similar threads and cannot find anyone that got any luck on this! I bought the Jet Ski used and figured it would be a fun little project and got a pretty good deal on it. When I first got it the owner said it needed a new starter but looking down in the hull there was a ton of oil, but still had oil in the reservoir so this threw me off. I cleaned as much of the oil as I could and threw a battery in and got it starting. When I ran it on the trailer it started fine and ran good and could get high rpms, I took it off in the water twice and could only get to 3500 rpms. I tried unplugging the rectifier and that had no effect and I had the seat off and no water was coming in through the seal. Im sure Im gonna have to rebuild the fuel lines and all, but any other tricks to test for what it could be? The engine also made some popping every so often and it sounded like it was coming from the front!