Honda BF9.9A-BF15A Outboard Motors Shop Manual., Page 125Get this manual
HONDA BFS.SABF15A
LUBRICATING SYSTEM
Lubrication of the 4-stroke engine of the Honda Outboard Motor BF9.9A115A is of the forced pressure splash type using trochoid pump
aLUBRICATING PATH
The engine oil (9) inside the oil case lifted by the pump Half of the oil goes through the inside of the camshaft (2) and lubricates the valve (n) and rocker arms The other half goes through the oil passage in the inner cylinder wall and lubricates the crank chamberThe oil lifted to the crank top enters the upper journal, goes through the inside of the crankshaft (5) and exits from the crank pin holeThe oil that went through the passage in the middle of the cylinder enters the lower journal, passes through the inside of the crankshaft and exits from the lower crank pin holeThe oil from the crank pin hole pours out from the large end of the connecting rod and splash-lubricates the and cylinderAlso, the oil lifted to the crank top goes through the orifice (6) and lubricates balancer gears In this lubrication channel, an oil strainer provided to eliminate forcing matter metal residue, etc so that each part always be supplied with clean oilbOIL PUMP