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  1. #1
    Sawtooth763
    Join Date
    Aug 2008
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    Chicago, IL
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    41

    MSAX 110 Overheat Indicator keeps comming on

    Had the ski out yesterday, runs fine WOT in a straight line with no problems. Make a few agressive turns and WAM, the overheat light and overheat indicator come on (along with the check engine indicator). Shut it off for a few seconds, turned it back on then all is OK for a while. This process kept happening throught the day. Coolant and Oil are full, water intack screen is clear, coolant is flowing to the exhaust nipple.

    Any thoughts out there on this? Can it be a faulty senser? The machine did overheat, blew a head gasket a couple of years ago. Was fixed by a Polaris dealer. This is why I'm thinking it might be a bad sensor.

    Any help would be greatly appreciated. Have a family vacation planed the end of June so I'm under a little pressure to get to the bottom of this.

    Thanks


  2. #2
    2&4strokepolaristech's Avatar
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    Aug 2006
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    Oswego,NY
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    Overheat

    Mark,

    When this happens what rpm does it limit you to? Secondly if you open your coolant bottle do you see any oil? Also when you start with the cap off do you see a stream of coolant shooting in from the bypass hose that connects the side of the coolant bottle(just look inside and you will see it you might have to give it some throttle to speed the water flow up. also if you run it out of the water make sure you have it in reverse) If you are ok with these check do the following: on the left side of the engine(exhaust manifold)look for a single wire that runs along to of the manifold and goes to a sensor on the back side of the exhaust manifold. This is the exhaust temp sensor much like other skis. make sure that the wire is not melted anywhere and is touching that manifold. Also make sure the connector is on the sensor good and is not touching any metal other than the sensor.If this is all good then while you are riding and the condition happens stop the machine and pull off the seat. drip some water on the exhaust manifold to see if it sizzles(if it does you have a restriction in the open or fresh water side of the cooling system and you need to look in that becasue you are not getting enough water to cool the system properly) If it does not sizzle than disconnect the wire and set it off to the side. take it for a ride and see if the condition happens again. If it is good and give you no problems you need a new sensor.

    The sensors mainly go bad due to people running the unit without any water being supplied to the fresh water side of the cooling system when flushing, or the unit was overheated at one time. In either case the sensor gets cooked and give you a false reading and needs to be replaced(easy job with common tools)

    Hope this helps
    Jay
    P.S. next time post this in the MSX/Matrix section

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Thanks Jay!

  4. #4
    I have the same problem.....except the wire(single blue wire) that attaches to the thermostat switch(number 25 in this image) has become unattached from the small metal cap that slides over the end of the thermostat switch. Could this cause an faulty overheat message? Thanks for the help. Click image for larger version. 

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  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by overstreet31 View Post
    I have the same problem.....except [COLOR="rgb(0, 0, 0)"]the wire(single blue wire) that attaches to the thermostat switch(number 25 in this image) has become unattached from the small metal cap[/COLOR] that slides over the end of the thermostat switch.

    Could this cause an faulty overheat message? Thanks for the help. Click image for larger version. 

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ID:	209809
    Damaged sensors are never a good thing with the Weber engines.

    BTW, it is better to post your questions in the Polaris General section, in your own thread.

  6. #6
    I apologize! Will move to a new thread pronto.

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