o-ring size ? - Snowblower Forum : Snow Blower Forums
 
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post #1 of 6 Old 03-01-2018, 04:54 PM Thread Starter
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o-ring size ?

Hey, do any of you gentlemen know offhand what size the o-rings are on the idle and main adjusting screws on a tecumseh carb are??? Thanks in advance Ken B.
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post #2 of 6 Old 03-01-2018, 06:01 PM
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Go to a local hardware store, check out the "O" ring assortments. Bring your needle valve assembly, and you might find a match, or try your local lawn mower shop.
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post #3 of 6 Old 03-02-2018, 08:16 AM
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Don't the rebuild kits come with them? Spend a few bucks on one of those and you'll get a bunch of other parts you may need now or in the future also.

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post #4 of 6 Old 03-02-2018, 10:26 AM
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For whatever reason I find the rebuild kits are cheaper for the 8-10hp Tecumseh engines than the 5hp, possibly because the 5hp are more popular, supply and demand? Some of the parts are interchangeable, the O rings, fiber washer, which are the parts easily lost. So I keep more of those around, the 5hp kits are just too darn expensive.

If you do a lot of repairs, go you the hardware store, compare the size, and see if you can get a package of 10 for cheap from eBay. My guess is the hardware store wants .60-.99 each.

There are 3 dimensions you need to know, i.d., o.d., and thickness.

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post #5 of 6 Old 03-02-2018, 10:42 AM
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Found this old thread concerning the o-ring size. I hope this helps.

https://www.snowblowerforum.com/forum...es-1-carb.html

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post #6 of 6 Old 03-02-2018, 11:31 AM
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Quote:
Originally Posted by Grunt View Post
Found this old thread concerning the o-ring size. I hope this helps.

https://www.snowblowerforum.com/forum...es-1-carb.html
However there are two O rings, sized differently, bottom high speed, side low speed.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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