Does anyone know why my Kawasaki jetski motor filled up with injector oil after sitting in storage.?

Question

Does anyone know why my Kawasaki jetski motor filled up with injector oil after sitting in storage.?

Answer 1

You didn't say what year and model so I can't be specific but some of the Jet Skis have a check valve at the point where the oil enters the motor. The rest would have a check valve in the oil pump.

First, be sure your oil tank vent is clear. If that is ok you should replace the pump, or check valve to be on the safe side. I've never seen that happen by the way.