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Thread: Carburator Orientation

  1. #1

    Join Date
    Jul 2011
    Location
    CA
    Posts
    1

    Carburator Orientation

    My Long EZ construction manual has the throttle and mixture cables making a right turn to the carburator after passing through the firewall. It seems that a straight run to carb would be much better cable routing but the M-S MA3A carb would need to be rotated 90 deg. The engine is a Lyc O-235. Any potential problems with the carb rotation?

    Hangar talk seems to center around in-flight accelerations forcing bowl fuel into new and unhappy places, changing the mixture. The float takes up so much of the fuel surface, that I think this unlikely. I've seen planes with throttle shafts parallel and perpendicular to the direction of flight. M-S offered no guidance. I figure if carb orientation was critical, we would have heard about it by now. Your thoughts?

  2. #2

    Join Date
    Oct 2011
    Location
    WA
    Posts
    1,205
    The throttle plate tends to deflect the fuel air mixture to one side. If the manifold is designed for that it might upset the flow if moved 90°. I don't know if it matters or not.

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