Got a magneto rebuild kit for the Wisconsin, not cheap at $165. Should be what it takes to get it running though. Found the specs on the rear axle and it came out of a Bolens QT-16. The Bolens engine was rated at 3600rpm which is 400rpm higher than the Wisconsin (3200rpm). Need to hit that 3600rpm goal some how, a couple ideas on how to reach that. First, turn up the rpm on the the engine 400rpm or, overdrive the output via chain/belt drive. An overdrive will better align the shaft to the rear axle but will also bring down the horsepower output. At 12.5hp I dont want to lose any power.
That got me thinking, been watching a lot of lawn mower and small engine videos. Tons of aftermarket performance out there for these small engines, not for the Wisconsin particularly. The modifications are pretty simple though, shaved head, larger carburetor. The Wisconsin is 100% forged internals, pressurized oil system, a bump to 18-20hp+ shouldnt hurt it.