does a I/O have a thermostat

[UBHSTRY]

Originally Posted by spareparts

the check balls Ferm is talking about are inside the hoses that go to the risers, its in that T fitting in the top of the housing, if they aren't in there, or if the spring is gone, it will overheat

Wow really?? I did not know this. I thought they stopped water from flowing, not used to make it flow.....