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How hot is too hot?

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  • How hot is too hot?

    Hello,
    I own a 1988 searay 230 weekender with a Mercruiser 260 and Alpha One Drive. How hot is too hot as far as temperature readings on the gauge? The therm is a 145 degree running on a closed heat exchanger system. At a steady 3000 rpm cruise the engine temp goes up to around 190; but remains in the green scale. Is this normal or excessive?
    Thanks!

  • #2
    That does seem a little high, but also those gauges are not known to be the most accurate. If possible, I would use an infrared temp gauge shooting at the bottom of the thermostat housing and see what it reads.

    Tech Support

    Sorry for the late response, your post slipped past me.

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