Tecumseh 8 1/2 snowblower motor becomes erratic after 8-10 minutes

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  #1  
Old 02-07-10, 01:20 PM
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Tecumseh 8 1/2 snowblower motor becomes erratic after 8-10 minutes

Tecumseh motor has non-adjustable carb 640084 which I've totally cleaned. Have also replaced the plug. Motor starts within 2 pulls and runs smooth for 8 - 10 minutes and then starts logging down - like being fuel problem. It's also not the gas cap - I've checked that. Could this be a problem with either the condenser or coil breaking down after motor heats up?
 
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  #2  
Old 02-07-10, 01:42 PM
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Condensers went out about 1986, but the coil could be heating up.

Really sounds like a fuel delivery problem, though.
 
  #3  
Old 02-13-10, 11:19 AM
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Thumbs up Craftsman snow blower model 536.881851

Hi,
I was going to buy a used Craftsman 8.5 hp snow blower, started to read the neg. comments and was concerned.
Model 536.881851
There was a lot of comments about it dying out under a load.
I went and looked and just could not turn it down, it was like new.
I shared my concerns with the seller, he said he had all the same issues as everyone posted. he also had it REPAIRED.

The problem was.
A GASKET WAS TO LARGE, IT BLOCKED THE FUEL LINE AND NEEDED TO BE REPLACED.
Gas was able to trickle into the line, but once it started it would run out (empty the fuel line) which was what was happening to just about everyones add I read.

I got it home, used it in around 12" - 16" of snow and had no issues what so ever.

He paid someone $120 to replace the gasket.

I AM VERY HAPPY I BOUGHT THIS UNIT, WELL WORTH THE MONEY.

TO BAD SEARS DID NOT HONOR OR FIGURE OUT THIS PROBLEM.

Hope this helped everyone.

Chuck
 
  #4  
Old 01-17-11, 08:21 AM
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Craftsman 8.5hp snowblower dies

My Sears Craftsman started to act up the second winter I owned it. It would die at some point during its use. It could be 2 hours or 3 hours. Over the last 5 years it has gotten worse to where yesterday it died after 5 minutes of use and would not start. Checked gas cap and had just had it tuned two months ago so it had new spark plug. When it died yesterday we checked and found out there was no spark. I even plugged the electric starter in and ran it for awhile and no starting. One service place suggested the coil? I will post after it is fixed and working properly if this, coil, was the problem. Sears was of no use and this is the last Craftsman snowblower I will ever buy.
 
  #5  
Old 01-17-11, 02:03 PM
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Originally Posted by johnkux View Post
My Sears Craftsman started to act up the second winter I owned it. It would die at some point during its use. It could be 2 hours or 3 hours. Over the last 5 years it has gotten worse to where yesterday it died after 5 minutes of use and would not start. Checked gas cap and had just had it tuned two months ago so it had new spark plug. When it died yesterday we checked and found out there was no spark. I even plugged the electric starter in and ran it for awhile and no starting. One service place suggested the coil? I will post after it is fixed and working properly if this, coil, was the problem. Sears was of no use and this is the last Craftsman snowblower I will ever buy.
i would disconnect the kill wire at the coil and if it sparks then, there is likely a short to ground somewhere in the kill wire circuit.
 
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