1976 Johnson 2HP 2R76 Outboard Motor Service Manual, Page 35Get this manual
5-2 DESCRIPTION
The power head consists of one cylinder, piston, rod, crankshaft, and crankcaseThe cylinder is horizontally moooted in vertical plane and delivers one power impulse per crankshaft revolutionSee Figure 5-1FUEL INTAKE AND EXHAUST
THEORY OF OPERATION
EXHAUST PORT