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  1. #1
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    2011 mercury pro xs 225 can’t get full rpm

    2011 pro xs 225 serial number 1b805600 model number 1225p73ed I can’t get over 4700 rpm and hole shot is bad, same prop and last weekend ran top notch and didn’t change a thing and every tank of fuel run a fuel stabilizer.What can be the problem? Not missing or spidering and just purs at idle.
    Last edited by R491V; 05-31-2023 at 02:46 PM.

  2. Member
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    #2
    Not missing or spidering!

  3. Member
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    #3
    basics first , do spark test on all 6 , i cant tell you how many times ive had people tell me it idles perfect , on 5 cyls = no spark on one as well as several others , does warning horn sound at key on ?????
    .................................................. ...the scariest thing in life is the unknown ...................................

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    #4
    Horn does sound when 1st hit the start button then shuts right off when engine starts ,when running no warning horn at all.

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    #5
    likely not going into guardian then if no beeps occurring
    .................................................. ...the scariest thing in life is the unknown ...................................

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    #6
    Well took the boat out and started running rough when I would get on the gas, not overheating according to smart craft around 128 degrees. Starting to think it’s a fuel problem like fuel pump going or fuel rail.

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    #7
    spark test and fuel psi test will tell us
    .................................................. ...the scariest thing in life is the unknown ...................................

  8. Member
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    Springfield ky
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    #8
    Be sure to check fuel lines. I have had one collapse almost completely and cause similar issues.