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  1. #1
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    Mar 2018
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    115 Opti Pro XS WOT RPM

    I’m debating making the move to SS. Looking at max rpm it appears 5000 to 5750. Loaded 14 RT188 115 Pro XS 2 stroke, 12-75x21P Black Diamond I was able to achieve 44.7 mph gps @ 5300 (Vessel View) on fairly calm water in 55/60 degree ambient temp. No water pressure available, no JP, 2 hole down.
    I’m in the middle of that “tolerance” I guess you call it. Why the 750 rpm disparity? Is there a sweet spot in that zone to shoot for without jeopardizing reliability. It’s my understanding these motors will let you know when you’ve reached maximum safe rpm?
    Serial No. 2B088900

  2. Member
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    Jun 2013
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    LONGVIEW TEXAS
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    #2
    has rev limit warning , id prop it for 5600 now with heat its gonna change when it cools off, may need 19 pitch SS
    .................................................. ...the scariest thing in life is the unknown ...................................

  3. Member
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    Mar 2018
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    #3
    Skip the laser 2 20P?

  4. Member
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    Jun 2013
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    LONGVIEW TEXAS
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    #4
    check in prop section what others are running on your type of hull with same engine 20 may still be to big heavy loaded
    .................................................. ...the scariest thing in life is the unknown ...................................

  5. Member
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    #5
    Thanks Joe

  6. Member
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    Jul 2017
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    Fresno, CA
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    #6
    I don't have an answer, but I'm running a 19 pitch Michigan Apollo and am turning 5600 rpm and running 45mph. With some good tail wind on calm waters can almost touch 46mph. I have the same motor but a 2017 hull if that maters.

  7. Member
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    Mar 2018
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    Coshocton Ohio
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    #7
    19p was hard to find and outta stock from merc. I picked up a laser 2 20p and jumped rpm up to 54 and change in the heat and can hit 45 consistently loaded. Hole shot is awesome, but rattle/vibration at idle going to SS takes some getting used to.