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  1. #1
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    Apr 2016
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    LOSS OF SPEED FX 20

    2016 FX 20 250 SHO, boat has hit 73.7 in the summer with just me. Regularly hits 70-71 two guys tournament loaded. I can only get about 62 with Two guys and tournament load now. Prop is 26 VMAX t-2. This prop hit 73.7.

    Two things I think could be the issue. I put a vented cover on it that could restrict air flow maybe? Or I have put 89 vice 91 Octane? Prop looks fine BTW.

    Any ideas or thoughts?

    Many thanks
    YJHAMMER 11
    Hollywood MD
    2019 Skeeter FX21LE

  2. Member
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    Feb 2017
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    conway AR
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    #2
    I never run w/ a cover but I don't think gas has anything to do w/ it.
    I have the 'ol 2 stroker so I could be wrong.
    try some airplane gas in it and see if she blows flames.
    then you know

  3. Member
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    Aug 2017
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    Bracey Virginia
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    #3
    I have also lost speed, 2017 ZX 250, got it in August and first couple tanks were 89 ethanol free, turned mid 6100 and 76.4 just me and light fishing load, now with full gear and 2 people just at 70 with ethanol gas, have not been out by myself but was running at 74 with 2 people with e free gas, IDK.

  4. Member
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    #4
    RPMs then and RPMs now?

  5. Member
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    #5
    Randy mine was 6000 then 5500 now. Feels like it just Will not pick up rpms
    YJHAMMER 11
    Hollywood MD
    2019 Skeeter FX21LE

  6. Member
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    Feb 2015
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    Columbia SC
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    #6
    Quote Originally Posted by Yjhammer11 View Post
    Randy mine was 6000 then 5500 now. Feels like it just Will not pick up rpms
    Have motor checked thats a big drop in rpms.

    That slip is bad at 73.7 for a 26 too just FYI.
    Last edited by Randy T; 04-16-2018 at 07:18 PM.

  7. Member
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    Nov 2012
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    Nederland, Tx
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    #7
    That big of a drop sounds like a motor issue.

  8. Banned
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    #8
    Sounds like your High Pressure fuel pumps and "secret filters" need looking into.
    It's a rather costly repair.

  9. Member Texas Larry's Avatar
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    #9
    Start with a compression check and new plugs. That will rule out a lot of problems, or identify a problem if it is there. I haven't heard how long plugs should last on an SHO, but I would think a lot longer than a 2 stroke. I run a vented Tuff Skinz cover on my VMax, and have had no issues.

  10. Member
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    Sep 2016
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    Oklahoma
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    #10
    My boat runs the same with cowl cover or not.
    2007 Skeeter 21i 300HDPI

  11. Member
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    #11
    pulling the plugs this eve. Seems to be the first check. Thanks all for the replys
    YJHAMMER 11
    Hollywood MD
    2019 Skeeter FX21LE

  12. Member
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    #12
    Pulled the plugs and they all look good and all are the same. Replacing the filters this eve and see if that helps
    YJHAMMER 11
    Hollywood MD
    2019 Skeeter FX21LE

  13. Member jdlefty3's Avatar
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    May 2011
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    Georgetown SC
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    84
    #13
    Also check the throttle cable to the hot foot. Make sure it is opening the throttle all the way.
    2018 Skeeter FX21 LE Ox Blood