Instruction manual

PROFICIENCY IN SURVIVAL CRAFT AND RESCUE BOATS OTHER THAN
FAST RESCUE BOATS
9 1
9. Rescue boat outboard engine
9.1 General description
Most outboard motors are petrol-driven, two-stroke engines although
four-stroke engines are becoming more common. Outboard motors may have
from one to eight cylinders.
Fig. 9.1 A2-cylinder 25 HP Yamaha outboard engine
1. Manual start recoil handle
2. Choke knob
3. Overheat warning lamp
4. Electric start button
5. Gear-shift lever (usually absent on very small motors which are pivoted by 180° for
reverse drive)
6. Throttle control & steering handle
7. Emergency-stop (kill) switch, lock plate and lanyard
8. Engine securing clamp
9. Tilt lock for preventing accidental tilting
10. Anti-splash plates
11. Cooling water inlet
12. Propeller
13. Zinc anode used for steering adjustment
14. Anti-cavitation plate
15. Rod for adjusting trim angle
16. Rope attachment