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Carburetors, Mixers, Fuel Pumps and fuel delivery Discussion about misc. carbs, mixers, fuel pumps, injectors.

Carburetors, Mixers, Fuel Pumps and fuel delivery

Fairbanks Morse by Onan. Carb Question


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Old 06-29-2019, 08:45:32 PM
EvilDr235 EvilDr235 is offline
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Default Fairbanks Morse by Onan. Carb Question

I have a one cylinder Fairbanks Morse engine made by Onan. It is model 1B-7. Any idea what carb was used on that engine. I can't find anything to ID it and I can't do a picture at this time. It is an updraft carb.
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Old 06-30-2019, 01:12:34 PM
mmcdonald mmcdonald is offline
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Default Re: Fairbanks Morse by Onan. Carb Question

If no other help and you can post some good pics of the carb I might possibly be able to help with identification or parts. In the back of my mind I want to think it used a Zenith 59 but not sure.
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Old 06-30-2019, 08:39:38 PM
EvilDr235 EvilDr235 is offline
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Default Re: Fairbanks Morse by Onan. Carb Question

It is a Zenith carb. The number on the small tag is S895? as close as I can tell. I have found a picture of one from an old auction that was held last year. The information did not tell the model number. It just said off from an Onan generator. It has random numbers stamped on the little round tag. Most are stamped to lightly to read. I have no way to do pictures today. It is a straight updraft carb.
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Old 06-30-2019, 08:49:17 PM
AZ Gary AZ Gary is offline
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Default Re: Fairbanks Morse by Onan. Carb Question

I have that same engine and it has a Zenith Carb, doesn't seem to have any number. I didn't have a air cleaner for it and it wouldn't run without restricting the air intake. I bought a small air cleaner unit from Auto Zone and it runs great.
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Old 06-30-2019, 09:39:09 PM
gnucklehead gnucklehead is offline
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Default Re: Fairbanks Morse by Onan. Carb Question

The only general Zenith reference I see in the older 1B manuals is TR20, and that was a generator manual.. Most of the parts manuals use Onan numbers. The industrial engine manual references the 1B-7 as having an oil bath air cleaner, probably governor controlled

http://onan.xmsi.net/901-0019%20Onan...n%20manual.pdf

Hope that helps
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Old 06-30-2019, 11:10:14 PM
EvilDr235 EvilDr235 is offline
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Default Re: Fairbanks Morse by Onan. Carb Question

The pictures in the manual do look like my carb. Thank you very much.
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Old 07-01-2019, 10:43:54 AM
gnucklehead gnucklehead is offline
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Default Re: Fairbanks Morse by Onan. Carb Question

This is from an old (1948) manual.. let us know if it matches your unit.
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Old 07-01-2019, 11:03:29 AM
mmcdonald mmcdonald is offline
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Default Re: Fairbanks Morse by Onan. Carb Question

S895 Zenith is a TR20 series carb.
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