08-07-2023, 05:14 PM (This post was last modified: 08-07-2023, 05:14 PM by cp4000.)
Haven't had that issue on my inboards yet but my 200 Optimax outboard on my last boat couldn't quite get up to temp, there was a small stone stuck in it keeping it slightly open.
That's where I would start...
Oops, thermostat that is...
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