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Thread: 454 thermostat

  1. #1

    Question 454 thermostat

    Hey Guys, I'm wondering if there is a preference on thermostats that should be used in my 1986 454, in water temps between 45 and 65 degrees? Any suggestions? Thanks...

  2. #2
    Gone Fishin' Charter Member Waterfoul's Avatar
    My Boats:
    1988 Tracker Pro 17, 40 hp Mariner.....1972 Glastron GT 140, Merc 50 power!!!
    Join Date
    Nov 2000
    Grand Rapids/Holland/Grand Haven
    The stock 143* t-state will be fine for you. It's what I run and have no issues (same water temps as you run in....Lake Michigan)

    [b]M Go Blue.......Gator boots, gator luggage, gator purses... all at cut rate deals!!!!

  3. #3

    Thanks Mike.

    Does your motor have a by-pass on it as mine does?

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