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A little help please..

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Posted February 17, 2016 - 09:18 PM

I am in need of a new ignition switch for a Tecumseh OH140 engine off a Craftsman tractor. I was given this engine and don't know what model tractor it came from other than it was a Craftsman older model. It has a solid state ignition if that helps. Anyone have any idea what switch will work?


#2 DougT OFFLINE  


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Posted February 17, 2016 - 09:56 PM

Jim, I don't have a number but you need to make sure the switch you use has an M terminal on the back and that has to go to the kill wire. It has to have a G term that needs to go to ground. Those 2 should show continuity when the switch is off and open when on. That is the only post that should show contact to the M term in any position. I'd even test a new switch just to make sure. Those ignitions are sensitive enough that they don't need an errant switch.

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Posted February 17, 2016 - 09:59 PM

Almost any Teccy based unit's switch
Never, never apply power to the cdi. It is ground out to shut down.

If that doesn't make sense, PM me.
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#4 JiminRI OFFLINE  

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Posted February 18, 2016 - 02:36 PM

The Sears 14/6 had a Tecumseh OH140 (14 hp, 388 cc, 1 cylinder). The switch number from that owner's manual is 4406R.

Here is one source for $10.39 including shipping.


And another for $9.32 (shipping TBD) http://www.jthomaspa...h_4406R_JT-9821

Both include keys.

See switch diagram (from first link) below.

Good luck,




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  • Switch 4406R.JPG

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Posted February 19, 2016 - 08:20 AM

Most NAPA's carry them too, but I don't remember the stock #

Edited by TAHOE, February 19, 2016 - 08:21 AM.

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