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  1. #1
    Laxcrazy23's Avatar
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    2004 Gtx Rpm 6,900?

    I just replaced the stock prop with a Solas SR-CD-12/2. This is what is considered the stock replacement from solas. I feel that the RPM should be higher then 690rpm. I'm thinking props pitch isn't right.Any thoughts?


  2. #2
    jpeconsult's Avatar
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    What were the RPMs before the prop swap? say that 5 times real fast.

  3. #3
    Laxcrazy23's Avatar
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    around 7400 i believe. The thing is, the ski is running like it was when it was new.

  4. #4
    jpeconsult's Avatar
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    Two things: Impeller nose cone walking up the driveshaft, OR SC.

    Did you install the impeller nose cone? It could be "walking" up the driveshaft causing a decrease in RPMs. If you installed it, remove it completly and retest.

    A slipping SC will also show very low RPMs. If you do not have the nose cone installed, you need to remove that SC before running that ski again.

    The rev limiter on the 185s is 7600 or 7650, depending on the year model you have. MY 2005 is 7600. It seems your RPMs were low even before you swapped.

    Do a search on impeller nose cone removal. There may be a link in my "JPEConsult's 185 Build" thread. IT should be dated sometime around 6/11/08 to 6/14/08. It was discussed right before I left Mudbug.

  5. #5
    Laxcrazy23's Avatar
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    sounds good. I have to get the ski in some flat water to see what the RPMS really can get up to. Past weekend i was in 2-4 chop.

  6. #6
    jpeconsult's Avatar
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    Get up under the ski and look through the intake grate to check the leading blades of the impeller. Look at the wear ring for gouges, knicks, and sever wear. Look at the nose cone where the front of the impeller meets the driveshaft and make sure that bugger is in place. Whether it is or not, remove it. If it is "walking" up the driveshaft, that could be a source of low RPM. Removing the nose cone will get you more RPM. Do a search on "nose cone removal"

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