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 TM 5-1940-277-20
TM 1940-20/2
c.
Drive-Neutral-Reverse - position of each transmission is separately and mechanically adjusted by the transmis-
sion selector lever located on the control panel.
d.
Drive Shafts - transfer power from engines to hydrojet units.
e.
Hydrojet Units - are hydrojet propulsion units that provide the thrust to move and steer the boat. Water is drawn
in through grilles in the underside of the boat and expelledthrough nozzles mounted beyond the back of the boat.
The force with which the water is expelled depends on the speed of the engine.
f.
Scoops - are movable metal shields that fit over the nozzles of the propulsion units and direct the flow of water
from the nozzle. The position of the scoops is mechanically adjusted by the steering wheel and the scoop control
levers mounted on the control panel. The steering wheel controls the port-starboard directional movement of the
boat. The scoop control levers control the forward-reverse motion of the boat. At low speeds, the scoop control
can be used to turn the boat by having one scoop in reverse position and the other in neutral or forward position.
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