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  1. #1
    ripcuda's Avatar
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    MSX 110/150 - Replacement thermostat lower than 180 degree stock?

    Here is the best old thread about replacement thermostats...
    http://www.greenhulk.net/forums/showthread.php?t=125537

    That was 2 years ago. Anybody find a 160-170 degree replacement thermostat for the 180 degree stocker since?

    The Motorad #342-167 described in that thread doesn't turn up in any searches.

    Maybe 'Raylesk' can get some more or point us to where to get them?

    I'd like a lower degree thermostat to go with my Desperado ECU reflash.

    Cheers!


  2. #2
    Redrum's Avatar
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    I think Desperado still sells them on his website doesn't he?

  3. #3

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    Not cheap at all, but here is an alternative on ebay: http://www.ebay.com/itm/370544609356#ht_812wt_1040. If memory serves, Polaris used a 160F in the 2006 and 2007 FSTs. In 2008, they switched to 180F and that part superseded the 160F unit.

  4. #4

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    I have them in stock.. http://www.weberpower.com/hydrospace...-manifold.html
    The price is $27.39

    Best regards,
    Randy

  5. #5
    ripcuda's Avatar
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    Awesome. That was easy!

    Thanks Randy!

  6. #6
    Redrum's Avatar
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    WOAH! Put the brakes on. Read the thread in the OP link and you will see that the MSX model has an extra flange on the bottom of the T-stat that the ones from the Hydrospace do not have. Unless you can rig it up yourself, they won't work properly.

  7. #7

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    I'm not sure what you are talking about?
    There might be some small differences (bleed hole, etc), but they are all interchangeable.
    I'm willing to listen, but I have sold many of all types.

    Thanks,
    Randy

  8. #8
    ripcuda's Avatar
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    Randy,
    He's referring to the extra flange on the stock t-stat bottom that also moves as set temp is reached and redirects coolant flow in the water rail.

    Right is stocker... left is t-stat that fits but missing the diverter flange on it. We need a t-stat with the flange.



    Do the Hydrospace t-stats have it?

    Cheers!

  9. #9
    ripcuda's Avatar
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    Quote Originally Posted by ride04msx View Post
    Not cheap at all, but here is an alternative on ebay: http://www.ebay.com/itm/370544609356#ht_812wt_1040. If memory serves, Polaris used a 160F in the 2006 and 2007 FSTs. In 2008, they switched to 180F and that part superseded the 160F unit.
    I've been emailing this fleabay seller about the '06 Polaris FST thermostat... turns out it is 70deg Cel (158 deg F)... but it does NOT have the lower flange on it like our stocker. The seller added another picture showing this. Bummer.

    Anybody ever run a t-stat without that diverter flange like the stock one?

  10. #10

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    Redrum is 100% correct!!
    I apologize. My history is based more on the HSR, and basic engine packages. I have never worked on a MSX-150, and they have numerous small differences that I am not familiar with. Here is a condensed summary from my associate at Weber..

    The MSX has a plate, and the hot water will continually recycle thru the engine. (closed loop). The flange stops the bypass, and send the warm water to the heat exchanger to lower the water temperature. Then it’s recycled back into the closed loop cooling system.

    The HSR water is bypassed into the water pump until the temperature rises and lets the water leave the engine. The HSR has a constant supply of fresh supply into the engine, so you can afford to discharge the water instead of recycling it. (open loop)

    I have been looking for a source for 160º stats, but have not had much luck!

    Best regards,
    Randy
    Last edited by Weber Guy; 06-30-2012 at 03:55 PM. Reason: spelling

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