Cooling System - Engine Temperature check
Software Method
Use Evinrude Diagnostics software to read temperature displays.
IMPORTANT: The engine temperatures listed below are based on an intake water temperature of 70±10F.
Install correct propeller and place outboard in a test tank or in the water. Start outboard and run at 3000 RPM in FORWARD gear for at least five minutes. Remember, running outboards at high speeds in test tanks may disrupt water flow to gearcase water intakes. Make sure the outboard has adequate water flow.
When servicing the propeller, always shift the outboard to NEUTRAL, turn the key switch OFF, and twist and remove all spark plug leads so the engine cannot be started accidentally.
Reduce speed to IDLE for five minutes. Check IDLE operating temperature.
Increase speed to 5000 RPM and check temperature. If engine temperatures are not within range, troubleshoot cooling system.
Monitor Screen
Typical temperature sensor readings at IDLE speed should be 167+/-5F.
Typical temperature sensor readings at WOT speed should be 122+/-10F.
Operating temperature must not exceed 212F.
Pyrometer Method
Use a Temperature Gun, P/N 772018, or a digital pyrometer to measure the outboard's operating temperatures.
Measure temperature of the thermostat housing at the top of cylinder head.
Typical pyrometer readings at IDLE speed should be 135+/-10F.
Typical pyrometer readings at WOT speed should be 110+/-10F.
