Reply To: Assemble thermostat housing Evinrude 18hp 1960

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November 3, 2022 at 6:53 pm #268643
Mumbles
Participant

    The rubber seal doesn’t sit on the thermostat, it gets wrapped around it. Looking inside it, you’ll see a small groove in it, which fits on the thermostats flange.  And yes, this seal gets crushed slightly while tightening the cover screws to help make it seal. The gasket is rather thick to and limits how much crush can be applied to the seal.