[roanie777]

i have a 1989 waverunner 500 im having problems with it it runs fine just sitting but when you try to give it gas it boggs down and goes about 5 mph and smokes what could it be please help me if you can

 

[GCwaverunner]

Does the engine almost stall upon throttle or does it rev up and not go anywhere.

 

[roanie777]

it dont stall it just goes slow

 

[fedorov5549]

INlet needle valve not opening. Clean and rebuild the carb and fuel pump. Check compression and spark first, change/check plugs.

 

[GCwaverunner]

So are the revs staying low or is it revving heaps and going slow (cavatating)