Over Heating Yammie 1992 150 2stroker.

[spareparts]

Yamaha recomeds using the flusihng attachement and the ear muffs , both connected to a dedicated water supply when running their V6's on a hose. Teh Yamaha water pumps have several places(water drains) that will suck air when you run it on a hose. Try using the flushing attachement and the muffs, see if it overheats then. Worse comes to worse, take it to the boat ramp and stick it in the water