The original 6 volt (positive ground) starter in my '52 GMC runs the right way after changing the electrical system to 12v negative ground with the battery + connected to the stomp switch and battery - connected to the engine block.
DC permanent magnet motors turn in the opposite direction when you change polarity. Our starter motors (and most [all?] of the other starter motors in the world) are NOT permanent magnet motors and don't care what polarity they are hooked up as.
Last edited by Bill Hanlon; 09/04/2023 11:29 PM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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