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1990C4S 1990C4S is offline
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Join Date: Sep 2009
Location: North of You
Posts: 9,160
John Deere D100 - No Spark

My friend has a D-100 two cylinder (likely a Home Depot model) that died after it was parked.

No spark from either plug. I cannot find a schematic online.

It has twin coils with diodes that go to ground (I think), I would expect this to be grounded to kill the engine?

No manufacturers name on the engine. Might be Briggs and Stratton?

A schematic would point me in the right direction to figure out why both coils have failed.

Anybody have any suggestions?
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