Chrysler 75 and 85 HP Outboards Service Manual OB 3646, Page 123Get this manual
ACOMBUSTION Spark plug ignites the compressed mixtureResulting explosion forces the piston down which in turn rotates the crankshaft B.EXHAUST Exhaust escapes through port and combustion chamber pressure fallsFresh supply of fuel is compressed in crankcase
CINTAKE Inlel port is uncovered, fuel mixture enlers combustion chamberFlow pattern of fresh fuel mixture helps push out exhaustFigure 1Operation of the 2-Cyce Motor122