Overheat alarm on Evinrude

[THEFERMANATOR]

The bypass is meant to open when the engine reaches roughly 3000 RPM's so that the T-stats are bypassed when the engine is running under load. @ strokers tend to need alot of heat at low RPM's to burn the fuel mixture, but under load they want to be run around 100-130 degrees to prevent a piston from sticking. The water pressure that the water pump produces is what opens the bypass on your engine, so a weak impeller will not make enough water pressure to open the bypass. Also the T-stats don't flow enough water at speed to allow the engine to run cool, so the bypasses are a requirement to allow the cooling system to function at all RPM's.