Frank Langer
1984 Ericson 30+, Nanaimo, BC
Hi Doug,Coming back to this issue even though consensus says overloading engine is source of overheating. When motoring at WOT I can push 200 degrees before I chicken out and back it down. Takes a long time (10 minutes) to cool down to normal temps (~170). I can motor for hours at 2200 rpm with temps at 170. Cooling water flow looks like this:
Does that look like adequate cooling flow at speed? If not I might look into a new freshwater pump. Or maybe I need a new coolant pump? Or both…
I think motoring at 2200 rpms and temp of 170 degrees sounds right. If I recall correctly you have the 5411 engine, while mine is the 5416, slightly larger. Your engine exhaust looks a bit less water flow than mine, but that could be difference in engines and I recently replaced the raw water pump. Yours does not look too low to me. Just my opinion...
Frank