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Craftsman model 536 881 800

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798 views 9 replies 4 participants last post by  guzzijohn  
#1 ·
I am new to the site and looking for information on my machine that I inherited. The problem with the blower it runs on half choke and after 15-20 minutes the engine dies. Apparently, it has run this way for most of its life. A small engine repair shop tried to fix the issue years ago but never really did. We live in Maryland and most years only a shovel is needed, so it sat a lot with no use. The gas was drained and the carb run dry at the end of the snow season. Stored in a garage.

My research so far leads me to believe this is not an uncommon issue for this model. A number of potential fixes have been given with mixed results like:

1. replace carburetor
2. needs a heat shield between the exhaust and fuel line
3. moisture is getting in through the choke knob affecting the carburetor.
4. moisture is getting in through a gap in side plastic covering near carburetor.
5. Briggs and Stratton sent out a new engine to one owner.

I do not mind putting in some money in this older machine, which probably only has about 15-20 hours on it, if I have a good idea of the problem. My concern is this model has some type of design flaw(s).
 
#2 · (Edited)
Welcome.

A heat shield is unlikely to fix a lean running condition (as indicated by having to run it on choke). Your Murray-built snowblower's manual is still listed on Sears Partsdirect, so I downloaded it, and it looks like the engine is a Briggs 12E114-0268-E1.

It came with either a Walbro LMS carburetor or a RuiXing carburetor.

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I have some experience with Briggs 12000 series engines, as I own a Murray single stage snowblower with a 12A103-0148-E8 engine that calls for the same RuiXing 798917 carburetor.

I bought an aftermarket 798917 carburetor on Amazon back in 2023 for my Murray, and it runs great.

If you do decide to go with an aftermarket carb, one caveat is to look for a fuel inlet that is sticking straight up, like this:

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and not like this where it's more at an angle, because some people have reported having to bend the fuel inlet pipe otherwise.

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The shape of the factory carb's fuel inlet pipe mirrors my suggestion:

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The reason for this? You may not clear the flywheel cover otherwise:

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