Push/pull kill/start button

Brian Reed

New User
When did they become standard? I have a 47 model an want to know if it's possible to find out if it came from the factory with this switch.
 
Can't say for sure what it was on the F-series, but it was pretty much standard for the letter series, except for the very earlies ones, and certainly was standard in '47.

Two types.

For the magneto-fired tractors, it was a single pole switch with a wire running to the side of the mag. With the button down, the mag was grounded, keeping the tractor from running and stopping it if it was. With the button up, it broke the connection to ground leaving the mag free to fire the plugs. The earliest As and Bs (and maybe the Hs and Ms --not sure of that) had a lever that ran forward to mechanically ground the mag to kill the engine. The switch replaced that setup.

On battery ignitions, it was a two-pole switch. Up, it completed the circuit to provide juice to the coil so it could fire. Down, it broke that connection.

The switch cases and buttons look pretty much alike. The difference is in their guts and function.

The originals and reproductions read OUT --RUN/IN --STOP on top of the button.
 
It's not entirely to your point, but in reading back, I realize a misspoke a bit. The lever to ground out those very early mags was n the side of the mag itself, and was actuated from the driver's seatby a sheathed cable. Could also be done by hand, and usually was if you were cranking it by hand.
 
If it originally had a mag, then it was a kill switch, likely since distributers were not standard until about 1949. Distributer equipped tractors have an on-off switch. I believe all letter series (1939-up) had the kill switch until distributers became available -- I'm not familiar with the F series.
 

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