Honda BF50 (5HP) BF5A Outboard Motors Shop Manual., Page 75Get this manual
VIOPERATION 1LUBRICATION SYSTEM 2COOLING SYSTEM 3POWER TRAIN 4FUEL SYSTEM
BFSO-BF5A
5NEUTRAL START SYSTEM 6THROTTLE OPENER SYSTEM 7HALF THROTTLE SYSTEM
1LUBRICATION SYSTEM
a0 CIRCULATION 1
The oil pump draws oil through strainer in the oil pan and supplies it under pressure to the lower main bearing and connecting rod journalOther engine parts receive lubrication from the oil that is thrown off the crankshaft either directly in the form of splash lubrication, or indirectly in the form of oil mistThe breather chamber, located at the upper main bearing, allows crankcase ventilation while preventing air that leaves the crankcase from taking oil with it
bOIL PUMP