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  1. Replies
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    473

    Is that a 2.5l motor?

    Is that a 2.5l motor?
  2. All parts I have came in Mercury marine bags and...

    All parts I have came in Mercury marine bags and were ordered from the same Mercury schematic drawing you have on your site. It's not worth saving a little money for after market parts in the long...
  3. Yes I did all that and installed a new spring. I...

    Yes I did all that and installed a new spring. I wish I would have saved the original spring now but got a new spring so installed that. Just got another new spring that seems to be lighter and I'm...
  4. Poppet valve probably needs to be replaced to....

    Poppet valve probably needs to be replaced to. Don't throw the spring away when you change the diaphragm they don't make that spring anymore.
  5. 2004 225 EFI poppet valve spring replacement.

    I replaced my poppet valve spring with the part number listed 64878 and it over heats because the poppet won't open all the time. The original was a thinner spring with less tension on it but it's...
  6. Replies
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    806

    That weld is on everyone of them and it causes...

    That weld is on everyone of them and it causes some problems. Some have ground them down flush and others have filled in front of them which seems to work the best. That boat never has been fast just...
  7. What size prop are you running now?

    What size prop are you running now?
  8. Replies
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    1,064

    Get Lithium Batteries

    Get Lithium Batteries
  9. Replies
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    1,064

    Find out if you can get the ECM flashed to 115...

    Find out if you can get the ECM flashed to 115 hp. I know guys were trying to do it a few years ago and it worked.
  10. Replies
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    846

    You didn't say but I'll bet the tempest is used...

    You didn't say but I'll bet the tempest is used not new and has some damage. Have the 25 tempest worked back to factory spec because it sounds like the cup is worn off even if you can't see it.
  11. Check the position of the bow mount cable when...

    Check the position of the bow mount cable when the motor is laying in the front cradle. There is a good chance that the cables are hitting the bow switch causing the motor to go up or down depending...
  12. Replies
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    1,044

    I'd bet your tach is off 200-300 rpm's now and...

    I'd bet your tach is off 200-300 rpm's now and your actually turning 5950 rpm's. When the pro's ran those boats they usually did 80+ loaded.
  13. A good Mercury mechanic should be able to have...

    A good Mercury mechanic should be able to have you turning that 25 trophy to 5600-5700 if the motor is running right which yours isn't.
  14. Replies
    21
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    2,139

    You should be mounted in the second hole from the...

    You should be mounted in the second hole from the top giving you 4.25" under. If it's 3.25" under that's why it blows out at take off.
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    448

    Same prop just different hub size. They don't...

    Same prop just different hub size. They don't make the big hub anymore.
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    1,003

    If it melted the first hub it will do it again....

    If it melted the first hub it will do it again. You'll have to google for it.
  17. I think you have too much prop slip on that fury...

    I think you have too much prop slip on that fury prop somewhere around 16% is what your showing. All that weight is why your speed is so low. How many rpms are you turning the 25T at WOT and what HP...
  18. Replies
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    1,044

    Is that 27 tempest new or used?

    Is that 27 tempest new or used?
  19. Replies
    12
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    1,044

    You should be faster than that unless your prop...

    You should be faster than that unless your prop needs some work. You probably need to raise your motor up because you should be able to turn that 27 Tempest and that 26 fury to 5800 rpm's.
    The...
  20. Replies
    2
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    426

    How would the factory know what load you will run...

    How would the factory know what load you will run in your boat? What prop is on your boat and what motor? If you go to Yamaha's web site Yamahaoutboards.com you can get a lot of info about your boat...
  21. Replies
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    508

    Check your prop to pad and set the motor at 2.5...

    Check your prop to pad and set the motor at 2.5 inches under any lower and you won't be able to control the chine walk at speeds over 60. With a 300 hp motor that boat will run over 80 mph and if you...
  22. Champion QL77CC only nothing else. I buy them 6...

    Champion QL77CC only nothing else. I buy them 6 at a time. That is from Mercury Marine.
  23. Mercury says not to run them on the new 4 stroke...

    Mercury says not to run them on the new 4 stroke motor.
  24. Replies
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    417

    The thrust washer that comes with the kit for an...

    The thrust washer that comes with the kit for an SHO will work on either prop as the engine determines what thrust washer you should use. Your motor might need the 2 piece thrust washer instead of...
  25. Replies
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    550

    Slip is close to 10% not 5% and with a tin boat...

    Slip is close to 10% not 5% and with a tin boat your lucky to get that. You don't have a planing hull and it's not smooth like a glass boat just be happy with those numbers. You actually should be...
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