Craftsman Snowblower.

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  #1  
Old 01-08-05, 09:06 PM
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Question Craftsman Snowblower.

Hi All,
I recently bought an old craftsman 22" snowblower. Model 536 909440. Another number on the plate 8292. It has a tecumseh motor,craftsman #143-687022,ser# 8193B. I have a tecumseh mechanics handbook,and this engine is not listed. Closest is 143-687012. Same?
Reason is after resolving the usual dirty gummed up fuel system problems,now there is no spark. I haven't done much more than removing the flywheel and the points cover yet. One thing I notice on the crank is two marks right before or I should say after the lobe that opens the points. Are these timing marks?
This is my first time digging into a mag/point system. I could use some tips on tracking this down and repairing it. This thing did run and cleared snow once a couple of weeks ago.
I would also like to find a manual on the snowblower.
Thanks,Bill H.
 
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Old 01-08-05, 09:12 PM
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Hello Bill!,

I think you'll be ok using the model# you found for reference.

The marks you see are where the points should open (first mark), and where they should close (second mark). Use an ohmmeter across the points to tell exactly when they open and close.

Don't move the coil and/or the bracket it is bolted to unless you absolutely have to. It can be tricky to get it exactly back in place....It's very sensitive.
 
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Old 01-09-05, 05:06 PM
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Thanks Cheese. How would I check the condenser?
 
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Old 01-10-05, 08:42 AM
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There is a test for the condensor although I personally dont rely on nor use it much. Points and condensor are cheap and if the old ones are accesed or removed during ne troubleshooting, I suggest to simply replace.
Your mechanics handbook may have the procedure, I am almost certain this one does however http://www.cpdonline.com/692509.pdf
The condensor is basically a small capacitor. The test consists of charging it then observing for a spark as you attempt to discharge it.
As Cheese mentioned DO NOT MOVE THE MOUNTING PLATE, the points and condensor can be replaced without moving this.
One saftey precaution you may want to do is mark all parts for orientation b4 disasembling.
 
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Old 01-10-05, 05:07 PM
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Thanks Aziz,
I went to the Sears parts store today and bought the plug,points,and condenser. I also ordered a new recoil assembly.
I hope to get back to it tomorrow.
 
  #6  
Old 01-11-05, 05:55 PM
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Replaced plug,points,and condenser. Still no spark. Magnets are strong. All wires seem to be fine? Coil?
Before this thing died I had to run it on almost full choke. It seemed to want to only run rich. And I mean headache,black smoke out the muffler rich. Was this a sign of the coil going belly-up?
 
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Old 01-12-05, 12:06 AM
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Have you tried a new plug? A weak spark can sometimes be compensated for a little bit by a rich fuel mixture. Whether that weak spark is caused by the coil or not I don't know. Have you tried disconnecting the kill wire from the coil and checking for spark?
 
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Old 01-12-05, 02:22 AM
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I did replace the spark plug,along with points and condenser. Disconnected the shut down ground wires,and still no spark.
 
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Old 01-12-05, 09:32 AM
Azis
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That should confirm a bad coil as long as your point gap is correct.
 
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Old 01-13-05, 12:36 AM
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Agreed. Time for a coil.
 
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Old 01-17-05, 12:23 PM
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New coil. No go. Ended up with a very weak spark. Pulled the flywheel to double check connections. Now no spark.
 
  #12  
Old 01-17-05, 05:10 PM
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I went out and pulled the flywheel again. Checking everything over again. When I picked up the flywheel to re-install it,I noticed that one of the magnets were loose. It was held in position by the glue ridges around it,but not really attached. I used two part epoxy to attach it back on. Will put the critter back together again tomorrow.
Could this have been the problem all along? I sure hope so.
 
  #13  
Old 01-17-05, 11:31 PM
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Yes, on this engine the magnets inside the flywheel affect engine ignition timing.
 
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Old 01-20-05, 03:02 AM
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Angry

Got it back together except for the shroud. Good spark at plug. Tried starting it and lost spark. Paid $100 for it and sunk another $70 in parts. I parked outside. Let the thing get buried in the 6" of snow we're getting today. I give up!!
 
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