A VERTICAL ENGINE FOR OUTBOARD MOTOR

摘要

Disclosed is a vertical engine for outboard motors, comprising a cylinder block having in-line horizontal cylinders arranged vertically, a crank chamber provided adjacent to said cylinder block, a cylinder head, a crankshaft enclosed by said crank chamber, an oil pan, a bottom wall of the crank chamber being positioned below a lowermost cylinder of the horizontal cylinders so that oil within the lowermost cylinder drips onto the bottom wall and an oil return passage for returning oil from within said crank chamber to said oil pan, said oil return passage including a passage extending in a lowermost bearing wall of said bearing walls in a direction toward the cylinder head for leading oil collected on said bottom wall toward the cylinder head to a position beyond said flywheel compartment, whereby the oil return passage extends around the flywheel compartment.