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June 9, 2021 at 7:58 pm
#239839
Update on the 83 Evinrude 15HP, I installed the thermostat, spring and retainer with a new gasket, ran the motor with the lower unit water muffs on it and the motor had a strong water stream form the tell tale Port, used a digital thermometer to test head and block temp, got constant readings of 137 to 145 degrees after 20 minutes of running at various throttle settings, so happy with those results. Now on to replacing the the throttle shaft / gear and the ball gear which are both missing a few cogs.