what line is water in to motor? is it the top line in to the exhaust?

The fitting on the top of the exhaust pipe is the flush fitting. If your worried about freezing then i would add antifreeze to the motor thru this fitting while running it then shut it off. Also you need to run fuel stabilizer to the gas as you run it. Ken

Thanks. I just had to locate the hose that supplied water to the motor. I did, top of the jet pump, real hum dinger to get to,, but all good now.. just helping out a bro.

The flush fitting would pump water into the motor and out the bypasses. Ken