Home › Forum › Ask A Member › 49 Champion – expansion plug? › Re: 49 Champion – expansion plug?
July 20, 2015 at 3:29 am
#20438
It may overheat if you run it with visible water coming out. The only place water should come out is the tube outlet just above the prop, which is underwater. Like Frank said, it is a closed siphon system. Water goes up one line from the pump, through the powerhead, and down out the other line with the aid of syphon action. The expansion plug may be on the way up, preventing water from reaching the cylinders water jackets if it leaks.