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Old 06-16-2012, 06:06 PM
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jbrewer jbrewer is offline
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Join Date: Sep 2011
Location: NC
Posts: 2,598
Default 106-check my diagnosis

I was working on getting my 106 running...I've done little with it since I got it (it ran well), other than the last time I tried to start it (3 mos ago?) it would NOT start, NOR WOULD IT STOP CRANKING. I had to quickly unbolt the battery lead to get that stopped. It does NOT do this all the time.

Another clue -> Previous owner said "I hooked up a 12V light to the + of the coil to groundbecause I've had trouble getting spark intermittently and it's a good diagnostic aid". Hmm.... reeks of shade tree, but for the time being it's still there.

Today... I tried to start it and there's no spark. I cleaned and verified point action (no problem) swapped coils (no difference) temporarily removed the condenser (no difference) , swapped spark plug cable (no difference) , and put in a new plug (no difference). There was voltage to the primary of the coil (the diagnostic light bulb was lit)

I noticed ONE thing...when I released the ignition switch (from the crank to run position) I saw a spark plug spark...but ONLY as the engine was coasting down and the key was in the RUN position.


I'm thinking now that the ignition switch is bad. That would account for the PO's observation of occasional spark problems, the "run on" starter sequence, and the lack of spark in the "crank" position... I think..... BTW, the solenoid looks new, as if it was replaced by the PO.

I do NOT recall if the "trouble light" was on when cranking (Doh!).

Do you agree with my diagnosis?

John
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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