1971 Evinrude Fisherman 6HP outboards Service Manual, Page 37Get this manual
DESCRIPTION The power head consists of the cylinders, pistons, rods, crankshaft, and crankcaseThe power head has two horizontally mounted cylinders in vertical planeAlternate firing order is used so that each cylinder delivers one power impulse per crankshaft revolutionSee Figure 5-1
AFuel Intake and Exhaust
EX HA UST PORT
INT PORT
THEORY OF OPERATION