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  1. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #61
    ^^^^ As Bryan indicated, it's a straight-through flow of water when on plane. Consequently, on plane temps may be significantly colder than "thermostatic" temps (especially when lake water is cold).

    As long as the engine reaches operating temp AT IDLE, and returns to operating temp at idle (after coming off plane), that is how the system is designed.


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  2. Member
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    #62
    Thanks guys. That is a relief.
    Your right I am due for a new impeller.
    Last edited by dblume; 01-15-2021 at 11:24 PM.
    Don Blume

    2018 Ranger Z520C
    2018 Mercury 250 Pro XS 2B525775 2-Stroke

    Past Rigs
    2008 Triton Tr186 with Mercury 175 Pro XS
    2000 Ranger R73 with Mercury 125
    1976 Basscat with 150 Mercury

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