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  1. #1
    Seaman
    Join Date
    Aug 2011
    Location
    wisconsin,usa
    Posts
    68

    Default air screw for carb?

    i've read the great sticky on carb syncing and adjust ty...how far out should the air screws be on 150 force '89

  2. #2
    Admiral jerryjerry05's Avatar
    Join Date
    May 2008
    Location
    Sebastian Fl.
    Posts
    7,227

    Default Re: air screw for carb?

    Need to make sure the compression is good.With a good guage 145-150#.
    The pumps diaphrams make sure they are good too.Reeds too.
    The air screws should be 1 and 1/16 turn out to start.
    Then after it's warm and in the water and in gear.Slowly turn in the screw till it just starts to cough/buck or stall then out 1/2 turn.Do this on all 3. The idle should be 750-800rpm in gear.Do it twice.
    Some people say then turn it in a little bit after this DON"T.
    Will cause piston failure and cost lots.
    IF YOUR OUTBOARD DOESN"T START WITHING A FEW SECONDS THEN SOMETHING"S WRONG!!!!

    boats . net is NOT the place to buy parts.They managed to screw up my last 4 orders.
    NO communication,NO follow through. Incompetent staff.Nuff said!

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    If you fix your problem,do the rest of the posters a favor and send in one more post telling who,what, how it was fixed.J

    88 Bayliner 21CC Twin 85hp Forces.fund

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