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  1. #1
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    1996 mercury promax 225

    im new to the site so forgive me im trying to figure it out. but i have a mercury 225 promax. it has 25 hours on full rebuild. ive replaced almost every thing on this motor. the ecm, stator, rectifiers, switchbox, high pressure fuel pump, injectors have been sent out and been cleaned and flow tested. the reason im selling the motor is to upgrade to a optimax and as of right now the promax will not spin over 4100 rpm and the mercury dealer here cant figure it out. but the motor runs perfect until that rpm. im sure its a small fix just no one around here can figure it out. so it being a sick promax im asking $5000 or best offer im located in jacksonville florida. thanks

  2. #2
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    or how about this shoot me an offer if interested.

  3. #3
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    who did the rebuild and do have any photos

  4. #4
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    Presision powerhead of jacksonville,fl and i will get some pics in a few days

  5. #5
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    photos ?

  6. #6
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    Im getting photos as soon as i get into town. And i will post them on here

  7. #7
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    Pleasecall 352-283-4797 thanks

  8. #8
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    I finally got pictures so if your interested and want pics please pm me thanks

  9. #9
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    What gearcase?
    Mike Smith
    '98 XB 2003
    '95 XB 2003 sold



  10. #10
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    the stock promax gearcase. it does not have the nose water pic-up if that helps. send me a pm i can give you a pic.

  11. #11
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    I'm in Orlando and interested in your motor. Please give me a call 407-456-1507. Thanks, Gerry.

  12. #12
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    Will call tomorrow thanks

  13. #13
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    Prince George B.C. Canada
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    Pulse pump. 15 bucks and 10 min to replace diaphragm,spring and gasket. The springs get weak and can feed the demand to the VST tank so when you reach 4000 rpm you have drained the VST tank and its only filling it up enough for a lesser demand. Ive had to change mine 3 times in 10 years did the same thing. Great idleing because it has a chance to fill the VST. then great at take off because the vst was full to start. then as i go the demand is greater and the VST tank drains. no fuel no power. Mine is also a 96 225 promax. i just updated the cowl and decals.

  14. #14
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    Thank you so much for the info i will try that and update you. Again thank you and ill get that put in this weekend

  15. #15
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    Whipper the low side fuel pump dident work. Still same symtom. But i have a hand full of parts that im replaceing on it that are known good parts and we will see how that goes.

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