Patent ID: 6651635
Filing Date: 2003-11-25
Classification: F01M

Abstract:
A breather apparatus for a 4-cycle engine, said 4-cycle engine comprisinga crankcase is divided with a bulkhead into a crank chamber in which a crankshaft is housed and a transmission chamber in which a clutch body is supported by a counter shaft, an oil pan to store lubrication oil in each chamber, a pair of oil pumps in said crank chamber, one of said pumps being adapted to take in lubrication oil from said oil pan in said crank chamber, and the other of said oil pumps being adapted to take in lubrication oil from said oil pan in said transmission chamber, a kick engine starter having a pedal comprising a kick idle gear adapted to start said engine by transmitting a force applied said pedal to said crankshaft via said clutch body and a plurality of gears, a hollow kick idle shaft which supports one end of said kick idle gear and rotates on the upper rear of said counter shaft in said transmission chamber and having at least a part of which overlaying said clutch body, a breather passage located in said kick idle shaft, a blow-by gas intake port on the side end of said kick idle gear; and a blow-by gas exhaust port located on the end of the opposite side of said kick idle gear.