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Antique Gas Engine Discussion

Carb position on a 1920 Fairbanks Morse engine


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  #1  
Old 01-31-2010, 01:18:34 PM
Kenny Kline Kenny Kline is offline
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Question Carb position on a 1920 Fairbanks Morse engine

hello,
when i bought this 1920 fbm 3 hp "Z" spark plug engine the head and carb were off the engine. now that i'm reassembling the engine.i'm not sure where the carb is to be mounted.the head can be positioned any of the 4 ways it can be installed. the book i have shows the muffler pointed to the ground. which would make the carb mounting on the left side.it seems to me the carb should be at the bottom and the muffler on the right side and the spark plug on top(12 o'clock position).please can anyone help on this?
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Old 01-31-2010, 01:45:43 PM
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Meco3hp Meco3hp is offline
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Default Re: Carb position on a 1920 fbm engine

Hello,
The carb should be down and the muffler is out the side.

Thanks!
Richard
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Old 01-31-2010, 02:07:58 PM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: Carb position on a 1920 fbm engine

Meco3hp is right - carb mount down, exhaust to the left, plug up. The carb mounts so the throttle arm is on the mag side, and the governor throttle linkage attaches to it. At rest the throttle should be open, and as the governor weights swing out, the throttle should close. If your engine has the decompression arm, it mounts on the upper right head stud, facing the left so as to hold the intake valve keeper open when set. When the engine starts, the decomp arm swings away from the keeper, and compression becomes normal.
Andrew
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