1998 sportster 1800 help!!!

[Adam White]

I just bought a 1998 sportster 1800 I too it to the lake and it started well and idles great but when you push the motors over 3500 RPM the stall out and die but if you run one at a time it will pulse almost die then rev I have good spark? Help me first jet/seadoo iv owned

 

[El Toro 33809]

Welcome to the forum. Sorry you are having problems with your new boat. The normal things to check would be the compression and fuel lines. The original lines would be grey in color and must be replaced. The compression should be 130 or higher, ideal would be 150.

Look into these items and repost your questions and findings in the 2-stroke Boat action for the forum. You should be able to get assistance there.