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  1. #1

    Join Date
    Jul 2003
    mumbai, INDIA
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    os 55 ax carburetor

    Had a mid air a couple of weeks ago, and realized that the carburetor neck was cracked and the retaining screws had fallen off. A small crack is also seen in the crank, where the carb is attached.
    Is there any way to fix this or should I replace the engine ? What size / type are the retaining screws ? Size mentioned on carb specs is 3.5 x 5 mm. Could not find any such screws on Tower hobbies OS parts list.


  2. #2
    Join Date
    Apr 2002
    Champaign, IL

    RE: os 55 ax carburetor

    If the carb has the crack, replace the carb body.  If the engine is cracked, you may need to replace the crankcase.

    This screw will work:

    OSMG3840   25081700 CARB SCREW #4D4C2H    US$2.29

    These parts can be ordered through any hobby retailer who sells O.S. Max engines and accessories.
    Bill Baxter, Manager Hobby Services/Futaba Service/North America
    3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
    Service Phone: 217 398-0007

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