Key start lawnmower

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  #1  
Old 08-09-14, 06:21 PM
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Key start lawnmower

I have a craftsman B and S lawnmower with key start. I measure 12.9v. at harness connector at starter motor but motor will not turn over. But if I use a remote 12 v. battery directly to starter motor it turns over right away. Any help would be appreciated.
 
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Old 08-09-14, 07:14 PM
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The starter has a harness connector? I don't know of any craftsman mower with a briggs engine that has a connector in line with the starter cable. Knowing what you have would help though, craftsman made hundreds, maybe thousands of different mowers with briggs engines.
 
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Old 08-09-14, 08:03 PM
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The craftsman no. is 944.369640 and the briggs no. Is121R05-0411-F1 hope that helps
 
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Old 08-09-14, 09:56 PM
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Sears parts lookup is down for maintenance right now, so I can't look it up. Are you saying the starter cable is plugged up with a connector?
 
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Old 08-10-14, 09:08 AM
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I am saying the starter has 2wires with a plug type connector that connects to another plug connector with wires going to the key switch etc. If I connect a remote battery to the connector on starter it works fine, but not when connected to key sw. properly. That is with a fully charged battery.
 
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Old 08-10-14, 09:32 AM
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So with one circuit you have the switch with a hot wire feed to the switch and a wire going to the solenoid where the battery cable hooks up on one side and the cable that runs to the starter comes off the other side. All that is pretty standard, maybe with a few small variations.

You also likely have the kill wire going to the switch and maybe a ground wire coming off it to get a good ground fro killing the engine.

But the engine won't turn over with the key, but it will start with a remote battery hooked to the mower with ground and the positive cable touching up with the hot post on the battery.

Is that what you have?

If so I would look at the solenoid and/or the ground from the battery mounted in the mower.
 
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Old 08-10-14, 07:30 PM
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Thanks marbobj you steered me in the right direction I found the problem. Thanks again to everyone envolved.
 
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