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  1. #1
    My Boats:
    new to me 388 slingshot 2000 velocity 390 sold 2005 390 velocity sold 2001 390 velocity sold 260 velocity sold 320 velocity sold 30ft velocity sold vr1 velocity sold 35 Cigarette sold. 34 phantom cur.
    Join Date
    Apr 2003
    Punta Gorda

    do you need to run 93 oct. in 500 carbed mot.

    Just wanted to find out.

  2. #2
    Charter Member # 545 Gold Member Beak Boater's Avatar
    Join Date
    Dec 2000
    Port Tobacco MD/Cape Coral Fl
    Its a wast to run 93, in those motors. You will also get more soot on you transom with 93, than you will with 87. Just more to clean off.

  3. #3
    Who Me? Platinum Member FeverMike's Avatar
    My Boats:
    2006 38TE Fountain
    Join Date
    Jan 2001
    Runs much better on 87 octane unless you bunp the timing up past 36 degrees.

  4. #4
    Gold Member Gold Member Pwrbt33's Avatar
    Join Date
    Jan 2001
    Curtis Bay, Md USA
    Yup as stated, 87 or 89. No need to run 93.

    Pwrbt33-John S.
    2012 World Champion Throttleman
    JAWS Marine

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