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Bypass the switch, by putting the wires together. The switch breaks the mower clutch circuit . Then you can order a new switch if you want it back.
Actual mower model ? 1754 etc? Does mower have a rio switch, that cuts off the deck when you reverse? The switch you have is the switch that overrides the rio. Do you want it to cut off in reverse. If not, leave the bypass switch alone, and do away with the RIO. Rio is just two wires!