Need engine heat in cold water
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Need engine heat in cold water

  1. #1
    Senior Member Jim W's Avatar
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    Default Need engine heat in cold water

    What's the best way to get water temp up in 40 degree water?

    BBC V-drive with a belt driven pump and no T-stat.

    In January I had the boat in 45 degree water and after 20 minutes running idle to under 4000 RPM, the water and oil temp needles never moved.

    Gently pinch the inlet hose????

    Just looking for a temporary "fix" until the water warms up.

    Jim
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    "The" masheenist wsuwrhr's Avatar
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    Move?
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    Spiral out MikeF's Avatar
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    Maybe add some type of extra hose/gate valve after the water pump to dump 1/2 the water that would normally go to the engine.

    If there is an oil cooler....definately slow the water into that one.

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  6. #4
    gn7
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    Die hards! What the hell are you doing on 40* water! Are you aware that you are only 6* from needing a ice breaker on you bow! Think about a set up like this
    http://www.rexmar.com/page160.html



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    Sit N' Spin Jetaholic's Avatar
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    Quote Originally Posted by gn7 View Post
    Die hards! What the hell are you doing on 40* water! Are you aware that you are only 6* from needing a ice breaker on you bow! Think about a set up like this
    http://www.rexmar.com/page160.html
    X2 on the thermostat.

    I know you run a V-drive, but my jet runs a t-stat and the temp gets up to about 140-150ish and never deviates from that. Works great and I swear by it.



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    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by gn7 View Post
    Die hards! What the hell are you doing on 40* water! Are you aware that you are only 6* from needing a ice breaker on you bow! Think about a set up like this
    http://www.rexmar.com/page160.html
    Pretty sure the above is only for "Jet Boats" ie big water pump. V-Drives only send water through the block when moving...correct?
    Not sure how much block pressure a v-drive makes but maybe some type of 'slight' restriction before the water exits could build more heat.
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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    gn7
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    Quote Originally Posted by HammerDown View Post
    Pretty sure the above is only for "Jet Boats" ie big water pump.
    Not sure how much block pressure a v-drive makes but maybe some type of 'slight' restriction before the water exits could build more heat.
    They work just fine with a neovane, or magnaflow pump



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    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by gn7 View Post
    They work just fine with a neovane, or magnaflow pump
    Gottcha...I missed the "belt driven pump" part.
    Edit...for the thread starter, my REX Bypass T-stat works great!
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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    Senior Member Widetrack's Avatar
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    On my V-Drive that I had a guy that I spoke with told me to only restrict outflow never inflow! And I did it with a gate valve and worked the temp up a little at a time till I got it right! Just my .02 WT


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    You said short term fix.. I used to run a big washer in the outlet part of the intake. It fit perfect.. It restricts the outlet water to build heat.. If you need more heat, just drill out the washer a little bigger. Worked great.
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    Senior Member Jim W's Avatar
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    I was thinking of restricting the inlet side. Was worried about too much water pressure when restricting the outlet.

    There's a water pick up under the transom then up to a large sea strainer then to the engine/trans cooler. I can pinch off the rubber hose between the sea strainer and cooler. The rest of the system is braided lines and AN fittings.

    Might be able to put a washer under the water outlet. Have to check that out.

    Thanks for the help, Jim
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    Got it wet on 6/15/10-------->finally......



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    "The" masheenist wsuwrhr's Avatar
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    Do you think you will get over 16-20psi restricting the outlet?

    Quote Originally Posted by Jim W View Post
    I was thinking of restricting the inlet side. Was worried about too much water pressure when restricting the outlet.

    There's a water pick up under the transom then up to a large sea strainer then to the engine/trans cooler. I can pinch off the rubber hose between the sea strainer and cooler. The rest of the system is braided lines and AN fittings.

    Might be able to put a washer under the water outlet. Have to check that out.

    Thanks for the help, Jim
    SB Products:Inspiring metal to change shape, one chip at a time.
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    Senior Member Jim W's Avatar
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    Quote Originally Posted by gn7 View Post
    Die hards! What the hell are you doing on 40* water! Are you aware that you are only 6* from needing a ice breaker on you bow! Think about a set up like this
    http://www.rexmar.com/page160.html
    I bought the boat in Kentucky around the first of January. Had it in Lake Cumberland for about 20 minutes when it was 45 degrees and raining just to make sure everything was working before I towed it 800 miles away.

    Don't laugh about the ice breaker thing. Done that a few times getting my boat storage customers off the lake. The channel freezes up before the lake and I have had to break through thin ice a few times to get to the trailer. Believe it or not......you can walk on a inch of hard ice but, it's pretty scary!!!!

    Jim
    GN7
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    Got it wet on 6/15/10-------->finally......



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  16. #14
    gn7
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    Jim, if you are refering to your v-drive Hallett Vector, never restrict the inlet. If you are using a rubber impellor pump like a magnaflow, don't worry about having too much pressure. The pressure is actually a plus. Think about the pressure in a car radiator. Only jets have to worry about the pressure getting to high. If you didn't have water cooled exhaust I say just put some sort of restriction in the outlet, but with the 4 port thermo deal the water thru the exhaust remains constant.



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