Stuck rags

This ski owner had trouble on a way back to boat ramp. Customer said, The ski won't go forward suddenly and felt vibration from ski.

If any rubbish, rope, rags and seaweed stuck or twist around of drive unit, this may cause of cavitation problem and worst case impeller won't kick water by bubble. In short lose thrust force from jet pump unit also ski have a chance to get over heat because engine cooling sys water pick up from jet pump unit.