1969 Evinrude 40 HP Big Twin, Big Twin Electric Lark Service Manual 4596, Page 43Get this manual
DESCRIPTION The power head consists of the cylinders, pistons, rods, crankshaft, and crankcase The power head has two horizontally mounted cylindersAlternate firing order is used so that each cylinder delivers one power impulse per crankshaft revolutionSee Figures 5-1 and 5-2
FUEL NT KE AND EXHAUST
EXHAUST PORT