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40hp merc outboard have thermostat

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  • 40hp merc outboard have thermostat

    I have a merc outboard 40 hp ser#555407 Does this have a thermostat? water does not come out of tail tale stream at idle.any help would be appreciated

  • #2
    Re: 40hp merc outboard have thermostat

    Tex,Had this problem with my Mariner and got awsome help on this board. Turned out that I had trash in the pee hole right at the outlet. Try cleaning that first with a straightened paper clip or a pipe cleaner and see if that don't fix it.When did you last change the pump impeller?Case

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    • #3
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      Re: 40hp merc outboard have thermostat

      Thanks for the quick responce ill try cleaning the hole. its been about two years i guess its time to change

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