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rlbinder
10-10-2017, 11:48 PM
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?

Bill Berson
10-11-2017, 07:38 AM
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.