POWERHEAD
4-7
1-/ 2-Cylinder
DESCRIPTION OF OPERATION
The power head of this outboard motor is a two-
stroke engine (or two-stroke cycle engine). The
engine completes its one cycle operation including gas mixture
suction, compression, explosion and exhaust while the crankshaft
rotates once i. e. the piston moves upward and then downward
(two strokes).
As the piston starts to move toward top dead center (TDC), the
interior of the crank case is made vacuum pressure causing the
reed valve to open and the gas mixture to be taken into the
crankcase. As the piston comes near the TDC, the spark plug
produces the sparks to ignite the compressed gas mixture for
combustion. As the fuel mixture is exploded, the piston moves
toward bottom dead center (BDC) and open the exhaust port and
then scavenging port. The scavenging is an action that sends the
fresh gas mixture in the crankcase to the cylinder.
1
2
T1674
T1675
Summary of Contents for 2 Stroke Cylinder Series
Page 1: ...PNo 003 21035 1 0509 NB 1000 Printrd in Japan 1 05 8 23 1 33 PM 1...
Page 99: ...SECTION 4 4 18 1 2 Cylinder T2201 16...
Page 103: ...POWERHEAD 4 23 1 2 Cylinder POWERHEAD Typical 1 Cylinder T1676...
Page 104: ...SECTION 4 4 24 1 2 Cylinder Typical 2 Cylinder T1677...
Page 140: ...SECTION 5 5 22 1 2 Cylinder 8 T1620...
Page 162: ...SECTION 6 6 10 1 2 Cylinder GEARCASE Typical Gearcase 2 5 3 5 T1709...
Page 165: ...GEARCASE 6 13 1 2 Cylinder Typical Gearcase 3 5B T1714...
Page 169: ...GEARCASE 6 17 1 2 Cylinder Typical Gearcase 8 9 8 9 9 15 18 25 30 40 T1723...
Page 214: ...SECTION 7 7 22 1 2 Cylinder Ignition System Performance Testing Flow Chart 1 T1557 1...
