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Author Topic: 2 stroke hover mower engine wire query  (Read 89 times)

Offline Desmac

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2 stroke hover mower engine wire query
« on: June 10, 2019, 09:44:05 AM »
I have two 2-stroke petrol hover mowers; a Flymo contractor L50 and an Allen something. both use identical Techmseh MV100S engines. The Flymo has a setting on the throttle lever which grounds a wire from the magneto to the engine block. This stops the engine.
The Allen has the cable grounded to the engine block to allow it to run (via a dead man switch). Can anybody through light on the purpose of the wire from the magneto which has seemingly opposite effects on seemingly identical engines?

Offline Mick

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Re: 2 stroke hover mower engine wire query
« Reply #1 on: June 10, 2019, 04:26:30 PM »
Hi Desmac, and welcome to TGMF.

Both those engines use the same method to stop the engine.  A terminal on the ignition coil, once grounded will kill the spark.

Method used to achieve this vary slightly with different machines / engine combo's, but the principle remains the same.   ;)