It is belt-driven. I turned the mower transmission 90 degrees and used the 5 speed forward drive axel to power a lower pulley. Then transfer power up to the propeller axel system. By welding the spider gears in the tranny bull gear, I get a reverse drive also. Not enough to supply much reverse...
Quarantine time was a perfect excuse to recycle an 18-year-old JD lawn tractor and a 1969 Sears 15 ft Jon Boat.
If anyone has information or real data on the riveted 15 ft boat I would love to see it.