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  1. #1
    dpoole5074's Avatar
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    Reduction nozzle advice

    Got some more questions for all you smarter than me people out there ..My ski was hitting 8100 rpm real quick with my 14/19 prop so installed a stock 15/20 off my 08 and does not hit but 77-7800..has a real bad cavitation problem also and I even had new wear ring and blade sharpened...so I ordered the reduction nozzle and am gonna put my 14/19 back on...Will the reduction nozzle be able to lower my rpm's enough so I can run this prop...Also I have been told that the rev limiter is 8100 but when mine cavitates goes well over 8200??? What is the limit and will the engine start to cut out when on it like a car does for example...Any help will be great cause it ran very well at the 8100 but I always let out and I want to be able to run wot...along with the nozzle I also got the rrfpr from jerry to and will be installing that....Thanks again for any info


  2. #2
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    8100 RPM is exactly where you want to be! I believe the rev limiter is set at 8300 RPM

  3. #3

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    215HP = ~8100RPM sweet spot

    255HP (X model skis) = ~8000RPM sweet spot

    -=Mike

  4. #4
    Big K's son KeithKman's Avatar
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    Are you running a aftermarket IC?

  5. #5

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    The rev limiter for an '04 is 8200, but it's not a hard cutoff like a car typically has. Instead of absolutely cutting the spark distribution at 8200, at some point above 8100, it progressivley backs off on the timing to produce less power, which limits the revs. You want to be at the highest RPM before you begin to lose power, which is 8100. Starting with the '06 ECU, the "rev limiter" was changed to 8300, and it seems to start retarding the timing after 8160.

  6. #6
    Big K's son KeithKman's Avatar
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    Quote Originally Posted by VX1 View Post
    The rev limiter for an '04 is 8200, but it's not a hard cutoff like a car typically has. Instead of absolutely cutting the spark distribution at 8200, at some point above 8100, it progressivley backs off on the timing to produce less power, which limits the revs. You want to be at the highest RPM before you begin to lose power, which is 8100. Starting with the '06 ECU, the "rev limiter" was changed to 8300, and it seems to start retarding the timing after 8160.
    So you're saying on a 2004 ski, 8100 is better than 8150?

  7. #7
    Moderator Snoman's Avatar
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    Quote Originally Posted by KeithKman View Post
    So you're saying on a 2004 ski, 8100 is better than 8150?

    Yes....

  8. #8
    dpoole5074's Avatar
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    Thanks for the input everyone So if my ski is hitting 8100 and not much more there is no reason to let out of it by what you are saying, am I correct?? If so that would be awsome cause it really pulls hard...I got my reduction nozzle today and Jerry says the rrfpr will be here next week so hopefully it will all work...Wanna get it over 80 mph and then work on the internals of the engine over the winter...Thanks again everyone

  9. #9
    outboard john's Avatar
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    It was my understanding that the ECU pulls fuel out at the determined rev limit and that is how they have a soft limit, and that that is why you don't want to be running on the limiter all the time. LEAN! Is this not correct?

    OBJ

  10. #10
    Moderator Snoman's Avatar
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    Quote Originally Posted by dpoole5074 View Post
    Thanks for the input everyone So if my ski is hitting 8100 and not much more there is no reason to let out of it by what you are saying, am I correct??
    Yes you are correct 8100 @ WOT....

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