Help With Sears 536.909800 - Snowblower Forum : Snow Blower Forums
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post #1 of 11 Old 01-27-2019, 05:38 PM Thread Starter
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Unhappy Help With Sears 536.909800

Hey guys. A buddy dropped off this old sears SB and it needs a new carb. It sat with bad gas and its trashed.

I tried looking online and cannot find anything on this machine that shows the carb. Its a tecumseh engine but I can't find much on it either. Tecumseh 143-686092 is stamped in the engine housing.

It looks like a HS 40/50 carb but the choke is different and the fuel inlet is a straight shot, not 90deg.

Any help?

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post #2 of 11 Old 01-27-2019, 06:10 PM
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How about a photo or two ??


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Make sure the windows are up before the snow plow goes by !!

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post #3 of 11 Old 01-27-2019, 06:17 PM
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i looked up the model in sears, most parts are listed NLA! if the op can give us the engine codes off the cover we can use the tech engine superseded list to help him find a carb that will work with minor mods like a new fuel line route
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post #4 of 11 Old 01-27-2019, 06:19 PM
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I'm thinking it's : - - > Lawn & garden equipment engine carburetor Parts #: 632037 Substitution: 631957B
Looks like the replacements come with both a 90 and straight fuel inlet fitting but check to make sure before ordering.
Plus I'd check around for best price.

Taken from SearsPartsDirect - - > https://www.searspartsdirect.com/mod...erm=143-686092

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post #5 of 11 Old 01-27-2019, 06:22 PM
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good one mark
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post #6 of 11 Old 01-27-2019, 06:25 PM
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Sears number 143.686092 is Tecumseh model HM80-155170E.
I think this is a replacement carb.


https://www.ebay.com/itm/Carburetor-...NVs:rk:27:pf:0

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post #7 of 11 Old 01-27-2019, 07:09 PM Thread Starter
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Hey guys. Sorry for the delay. I will upload some photos shortly.

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post #8 of 11 Old 01-27-2019, 07:11 PM Thread Starter
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http://imgur.com/gallery/kNfXjV5

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post #9 of 11 Old 02-01-2019, 10:33 PM Thread Starter
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Well I ordered a carb off of amazon for a HM80. I had to switch out the Choke lever as it was different but everything else was the same. The snowblower starts up and runs good. I had to adj the main jet and its almost completely tightened down. I'm waiting until it snows before I can test it out.

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post #10 of 11 Old 02-25-2019, 12:09 PM Thread Starter
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Well I noticed a major issue with the SB today. The clutch engage/disengage lever was wired in the engaged position. i'm guessing because the assembly is wore out and if you un wired it the clutch would disengage while running. This makes it a bear to start when cold. Warm you are fine. I may have to revisit the lever and find a way make it so it is disengaged when starting......

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