Quantcast Figure 4-27. Throttle control adjustment dfagram-cont. - TM-55-1905-217-120143

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TM 55-1905-217-12
age, the pins in the throttle control levers (15) at the
Engine may be brought up to operating temperature by
governor covers of both engines should be within 1/16-
declutching engines and setting throttle to approximately
inch of the same distance from the end of the slot in cam.
1,200 engine rpm. If quick warmup is attempted by
If the levers are not within this limit, the governor gaps or
turning the propeller, ,the ship must be securely tied to
the injector rack adjustments are not identical on the two
the dock with no loose lines or floating obstruction to foul
engines and should be rechecked (para 4-81).
(12) Disengage one engine throttle control (8)
If adjustments are necessary, repeat steps (14) and (15)
from cross shaft (5) by pulling upward on the lever. Set
above after making adjustments.
idle speed of engine to 550 rpm (para 4-31).
b. Reverse Gear Control (fig. 4-28). A single control
(13) Repeat step (12) for other engine.
(14) Set governor no-load top speed.
lever is provided in the pilot house and in the engine
(a) With both engines warmed up, stop engines and
room for reverse gear control of each propulsion unit.
disconnect throttle control rod (4) for outboard engine by
The reverse gear control is interlocked with the throttle
removing bolt (1).
control to prevent engagement or disengagement of the
(b) Start inboard engine, declutch and move pilot
clutch except when propulsion unit is at idle rpm. Control
house throttle control to FULL OPEN position.
of individual engine reverse gears is provided by a
(c) Note and record maximum no-load speed as
shutoff valve (18) for controlling the flow of oil to each
indicated by tachometer.
engine. The valves are normally in a vertical (ON)
(d) Stop engine and connect throttle control tube for
position. The reverse gear control linkage is adjusted as
outboard engine 'and disconnect inboard engine by
follows (-engine stopped):
removing bolt (13).
(e) Start outboard engine, declutch, and with pilot
house throttle control in FULLOPEN position, note and
If a shutoff valve is placed in an off position,
record speed.
lock it in that position to prevent vibration
(f) If no-load speeds of the two engines are not the
from moving it to a vertical (ON) position.
same, increase the low engine by loosening the lock nut
(11, fig. 4-20) and turning the high speed spring retainer
(1)  Disengage pilot house control lever (14 and
(10) in until the engine is operating at the desired no-load
17, fig. 2-3) by pulling out manual disconnect pin (22) and
turning 90 degrees.
(g) (connect throttle control rod (12) for inboard
(2)  Place engine room control lever (24) into
(15) Synchronize engine speeds at no-load.
forward position. Using turnbuckle, adjust rod (23) to
Speeds of the two engines within one propulsion unit
insure lever (20) is contacting forward stop.
must be synchronized to obtain, as nearly as possible,
the same no-load speeds in the range just below the
(3)  Place engine room control lever (24) into
rated load speed by adjusting the linkage to each
reverse position. Insure lever (20) is just contacting
governor. Synchronize as follows:
reverse stop. Adjust turnbuckle and 'rod (23) if required.
(a) With engines warmed up declutch both engines
and move the pilot house throttle control to such position
(4)  Place engine room control lever (24) into
that speed of the inboard engine is 1,750 rpm as
neutral position. Insure lever (20) is in neutral position.
indicated by the tachometer. lock the throttle in this
(5)  Repeat steps (2), (3), and (4) until lever (20)
(b) Note speed of the outboard engine.
is in correct position in relation to control lever (24).
If the speeds of the two engines are not the same, loosen
the ,locknuts at turnbuckle on the outboard engine, and
(6)  Engage pilot house control lever by pulling
by adjusting turnbuckle, shorten throttle rod to decrease
out manual disconnect -pin (22) and turning 90 degrees.
or lengthen to increase engine speed.
(c) Unlock and move pilot house throttle control to
(7)  Place pilot house control in forward position
FULL-OPEN position. In the full open position, without
and adjust turnbuckles (25) to obtain proper position of
strain on the throttle link
engine room control (21).
Repeat step (7) for reverse and neutral


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