Reply To: elto

[Mumbles]

Motors without a water pump rely on the pressure/vacumm system to get water circulating thru the motor.  This usually requires a short full throttle run while mounted on a boat to fill the cooling system and get all the air out. It would probably be next to impossible to achieve this while running the motor in a barrel.  The motors which I’ve seen with this system usually have a pipe plug somewhere on the powerhead where a garden hose can be hooked up for testing.

Where’s Tubs?  He’ll be able to answer your question about the impeller.