Honda BF75, BF100, BF8A Outboard Motors Shop Manual, Page 108Get this manual
CONSTRUCTION AND FUNCTION
LUBRICA
noll SYSTEM
Oil from the oil pump is forced through the pressure lubrication system by trochoid pump
1Oil circulation:
Oil (1) is drawn from the sump by the pump (2) through filter (9)where dirt and metal particles are removedand delivered under pressure to the various parts of the engineOil from the oil pump flows through the drilled passage in the camshaft (3) to the valves (4) and rocker arms (5) The oil also travels up through the oil gallery in the cylinder block The oil gallery is divided into two parallel passages which index the oil holes in the upper and lower main journals of the crankshaft (6) As the oil enters through the oil hole in the upper journalit travels down through the drilled passage in the crankshaft to lubricate the upper crankpin The lower crankpin is lubricated by the oil coming up from the lower main journal via the crankshaft passage Splash from the crankpin holes lubricates the connecting rod (7)piston (8)and cylinder