SPLATTERS OR FLOODS WHEN TURNING - Yamaha 12V Air Pump

I had a similar thing happen on a jet ski I was restoring. There was a mouse nest in the water box. Ran fine straight ahead but when you turned a corner it would block the passageway for the exhaust gases to escape the water box. The pressure builds up in the exhaust system and makes the motor shut down like it is flooded or out of gas whenever you turned a corner. Once you straighten the machine up the pressure escapes and it runs fine again. The bad news is you may have to pull the motor to get the water box out and clean it (Kawasaki). It just depends on the lay out in the hull. It may be a labor intensive fix but it can usually be done for just the cost of a couple of gaskets.