alright so i bought the ski planning on getting it running. put way to much money into already. rebuilt the top end and got everything back into it with a premix and block off now. go to start it nothing. so i put little fuel into carb. started right up 10 seconds later boom. the top end blew. not sure why or how but its all cracked. i bought another top end and its coming this week but i dont want to mess this one up again. maybe i installed top end wrong or i have no clue. just need some help im new to jetskis and road a js300 for first time and absolutly loved it so i bought one. got ripped off and put way too much in it
300/440/550 JS300 SX 1988 NEED HELP
- Thread starter motosurf781
- Start date
Make sure when you put the new top end on it that it's lubed really well with 2 stroke oil, for break in i recommend a 24:1 premix with premium oil such as Bel-Ray, Motul, Klotz. And me personally would only use 93 octane.