Re: 1960 Evinrude 5.5 hp thermostat

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October 17, 2015 at 7:55 pm #25663
Don
Participant

    US Member

    Well, the early thermostat supercedes to the newer SS unit, so there isn’t much you can do if the temperature ratings are indeed different. Like I said, these engines don’t run hot at all, I don’t feel the newer thermostat will cause much higher water temps on this engine, and hot salt deposits should not be an issue.
    Have you tried running the engine with this new thermostat?