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    2001 mercury optimax 135 running hot

    Yes sir all of that has been cleaned
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    2001 mercury optimax 135 running hot

    Thank you for your help. Thank you, that’s what I think as well I googled and found barnacle Buster flush kit it will be here by Saturday so I will know more by Monday. Lower unit is clean under the lower water pump impeller housing.
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    2001 mercury optimax 135 running hot

    .5 psi city water with muffs. Wot around 8/9 psi. I will try the poppet valve tomorrow. Thanks for your help.
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    2001 mercury optimax 135 running hot

    Yes sir I have the restraining washers in I’m not running the engine anything past a idle right now just trying to get this cooling issue fixed. Strainer in adapter plate is new as well. Thank you for your help.
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    2001 mercury optimax 135 running hot

    .5 psi at idle. It’sa complete new impeller kit upper and lower. Yes New grommets as well. And yes complete new poppet valve as well.
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    2001 mercury optimax 135 running hot

    What is safe to do a deep flush on this optimax I’ve heard of people using vinegar,muriatic acid, phosphoric acid to descale water passages in the motor. I cleaned and tested both temperature sensors and both are good. I also did a compression test and all cylinders ranged between 115 and 120...
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    What can I use to do a deep flush with on this optimax to descale possible blocked water...

    What can I use to do a deep flush with on this optimax to descale possible blocked water passages at idle or low rpms . I see some people use vinegar,muratic acid,clr, what is safe to use with internal aluminum parts. I cleaned the temp sensors and had them checked and also did a compression...
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    2001 mercury optimax 135 running hot

    Good flow from the tell tale.
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    2001 mercury optimax 135 running hot

    Ok I will try that thank you for your help.
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    2001 mercury optimax 135 running hot

    Thank you I will check it out again.
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    2001 mercury optimax 135 running hot

    How would I check this, a compression check?
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    2001 mercury optimax 135 running hot

    No sir that hasn’t been checked but thank you I will have it checked.
  13. D

    2001 mercury optimax 135 running hot

    It just continues to climb by the smart craft gauge I usually cut it off by 170 degrees. I haven’t checked the temp sensors yet.
  14. D

    2001 mercury optimax 135 running hot

    Help me please I have a 135 optimax that tries to run hot at idle. I have flushed motor out from top to bottom replaced all water lines. New thermostats,new impeller kit, new poppit valve, new water screen in adapter plate and it still does the same thing at idle or long no wake zones. When I...
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