I think I may have been here already....
Does it have an idle mixture control on the front tray?
If so, what we did was set & locked the mixture control at the carb, removed the knob & used the hole for the deadman switch.
Use the stop switch wires (or wire it to the same place as the stop switch in parallel to it) Other option is to remove the stop switch & replace with the deadman - then tyo stop you just pull the deadman instead of pushing a button.
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