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  1. #1
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    Optimax overheat alarm

    2009 optimax 225 pro xs is giving me an overheat alarm. I have smart craft tach. Gauge is reading 130 or less and water psi at idle is 5. 14 psi at 4500 rpm. As soon as I shut off engine and turn key back on alarm stops. I can run a minute or two and alarm comes back on. I did compression test and all 6 are good. Any ideas? I checked temp sensor and all three seem to be in normal range.

  2. #2
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    I'd check to make sure the pee hole out of the compressor is not plugged. If you get a rock or shell in the plastic fitting where it discharges from the cowl it can block the flow out of the air compressor and cause a compressor overheat fault.

    Is your gauge telling you that you have an overheat fault? If you are assuming the horn is an overheat and there is no compressor blockage, I'd check oil levels and sensors on your oil tanks. Boat tank and engine tank. A low oil level fault will sound the horn as well.

    Hope this helps.
    Last edited by HydroSkreamin; 10-01-2016 at 10:34 PM.
    A problem is only a problem when viewed as a problem...

  3. #3
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    Is the engine going into safe mode?
    "One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .

  4. #4
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  5. #5
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    That that year have a filter to air compressor?
    http://www.stvowners.com

    2003 Cougar 22MTR w/300xs x 3
    90 21Skater w/300xs - sold
    98 STV Euroski w/280 - sold


    2006 Trailblazer SS 6.0l 395hp

  6. #6
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    All the opti's have a water filter for the compressor.....

  7. #7
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    There is a temp sensor in the compressor. I have seen the compressor overheat will the engine temp says its normal. Had a shell in the compressor cooling hose.
    Cawley

  8. #8
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    Pee stream is steady and cool

  9. #9
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    Pulled thermostats. One definitely opens faster than the other but both open in 140+\- water

  10. #10
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    I still think you need to snoop around the compressor/ cooling more.... I know you said its peeing cool and hard. But........... JMO... I have seen them do chit like this before.
    Cawley

  11. #11
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    Are you getting any codes? is it going into safe mode?
    "One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .

  12. #12
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    Not in safe mode. Smart craft reads 125+\-

  13. #13
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    Steady beep or every three seconds or different? could be oil tank sensor or something different..... overheat would put it in safe mode
    "One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .

  14. #14
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    Steady beep

  15. #15
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    Beep codes from my 300xs Mercury manual lists


    Direct or fuel injector
    igniton coil.


    PM your e-mail address and I can send the listing for beep codes. Tried to attach but forum stated too big.
    http://www.stvowners.com

    2003 Cougar 22MTR w/300xs x 3
    90 21Skater w/300xs - sold
    98 STV Euroski w/280 - sold


    2006 Trailblazer SS 6.0l 395hp

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