Lubrication system for a vertical shaft engine

Claim 1

A lubrication system for a vertical shaft engine comprising a crank case having an upper and a lower wall, a vertical crank shaft, a vertical balancing shaft, a plurality of upper and lower bosses formed in said upper and lower walls for rotatably supporting said shafts, an oil pump housed in said lower wall, and an oil feeding passage for feeding lubricating oil from said pump to any part desired to be lubricated in said engine, wherein the improvement comprises: said pump having a drive shaft housed under said balancing shaft, the lower end of said balancing shaft housed in one of said lower losses, said balancing shaft being rotatably supported by an antifriction bearing; said antifriction bearing being held in an upper part of said one lower boss; said one lower boss protruding upward from said lower wall; said drive shaft connected to the lower end of said balancing shaft and; said pump being housed in a lower part of said one lower boss above said lower wall.