The Motor Wheel & Fiyer

1915 A.O. Smith Motor Wheel engine
My 1915 A.O. Smith Motor Wheel engine (minus the horns), 1919 Model S-102, 1920 Model P, and a 1923 Model PB. None of these early models had a shroud or finned flywheel for cooling (except the PB), but had a belt-driven fan for cooling depending on the ap