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newer carb

Old 09-16-2006, 09:09 AM
  #1  
ecpeter
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Default newer carb

Mr. Baxter,
I had inherited a plane with an OS MAX .40 SR, which is apparently even older than the 'discontinued'
category on OS parts lists. The carb assembly was recemtly destroyed as a result of a 'one-point
landing'; (prop spinner). I can't find a parts reference at the OS site for this one; is there a current
carb assembly which would fit on and work for this older engine? [as an alternative use for OS engines, you
may like to know that a .40 SR, with 10X6 prop will slice an ear of corn cleanly in half - while still on
the stalk!]
Thanks
Old 09-18-2006, 10:26 AM
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Bax
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Default RE: newer carb

According to O.S., the .40 FSR used a #4BK carburetor. If you have the inside diameter of the mounting boss (in mm), we can see if any of the current carburetors might fit. We don't ahve a size for the #4BK.
Old 09-18-2006, 11:23 AM
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ecpeter
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Default RE: newer carb

Thanks so much Mr. Baxter,
As close as I can estimate, the ID of the engine opening is 13mm.
I don't have a micrometer, but out of curiosity, I tried to test fit a carb from an old
OS 60 (carb marking7B?), and it is slightly wider than the opening on the 40SR.
Appreciate your help.

Old 09-19-2006, 10:08 AM
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ecpeter
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Default RE: newer carb

Thanks so much Mr. Baxter,
As close as I can estimate, the ID of the engine opening is 13mm.
I don't have a micrometer, but out of curiosity, I tried to test fit a carb from an old
OS 60 (carb marking7B?), and it is slightly wider than the opening on the 40SR.
Appreciate your help.

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