<< Timing and gas mixture can have a huge effect on running temps. >>
The only "unless" I could add to Rick's spot-on reply might
be "if motor has NEVER been out, re-built and at that
time, "boiled out" ", DH.
Other wise, Rick nailed it & I would start with timing.
But that's me [and my "Hortense" - BJ-7 of 30ish years].
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