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Thread: Raptor 400 cooling

  1. #1
    Join Date
    Nov 2015
    Location
    Lake Conroe
    Posts
    16
    Boat
    2015 Tige Z1

    Raptor 400 cooling

    Does anyone have a good explanation or description of how the "Closed" cooling systems work on the Raptor 400? I've searched high and mighty, but I may need some mechanical professional education. My question really lies in how the closed cooling system works in conjunction with the normal raw water system within the boat.

  2. #2
    Join Date
    Apr 2006
    Location
    Lake Wylie area, NC
    Age
    48
    Posts
    25,779
    Boat
    Back in the good ol' days a 2006 22ve
    generally, closed, or more accurately semi-closed, the engine itself is filled and cooled by automotive antifreeze just like a car. To cool the hot antifreeze that has circulated through the engine, it passed through a heat exchanger. The heat exchanger is the radiator of the boat engine. The exchanger is then cooled by raw water from the lake circulating through it. The exhaust manifolds are then cooled by the raw water system and water returns to the lake as it does on an open cooling engine.
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  3. #3
    Join Date
    Nov 2015
    Location
    Lake Conroe
    Posts
    16
    Boat
    2015 Tige Z1
    Quote Originally Posted by chpthril View Post
    generally, closed, or more accurately semi-closed, the engine itself is filled and cooled by automotive antifreeze just like a car. To cool the hot antifreeze that has circulated through the engine, it passed through a heat exchanger. The heat exchanger is the radiator of the boat engine. The exchanger is then cooled by raw water from the lake circulating through it. The exhaust manifolds are then cooled by the raw water system and water returns to the lake as it does on an open cooling engine.
    Thank you for the clear, detailed description!

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