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 TM 5-1940-277-10
TM 1940-10/1
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
2-32. OPERATION WITH ONE ENGINE
WARNING
It is critical for SAFETY purposes to keep the engine hatch covers dosed when
engines are running except when engine maintenance is being performed.
CAUTION
Exceeding 2000 rpm with one engine running makes the boat difficult to
maneuver.
There may be times when you will be required to operate the boat with only one engine running. If this should
happen, do not operate the running engine over 2000 rpm. Adjustments will have to be made in your steering
procedures to allow for the tendency of the boat to turn. Upon completion of your task or mission, head for shore
and immediately report your problem to organizational maintenance.
2-33. OPERATION IN EXTREME COLD.
WARNING
It is critical for SAFETY purposes to keep the engine hatch covers dosed when
engines are running, except when engine maintenance is being performed.
a.
Inspect hull frequently for ice damage.
CAUTION
Do not run the engines in neutral to charge the batteries as it could cause valves
to stick.
b.
Check bilge pumps frequently to see that pumps and outlets are free of ice. If necessary, use hot air or hot
water to thaw the pumps.
c.
Operate scoop controls and steering wheel frequently.
2-34. OPERATION IN EXTREME HEAT.
a.
Keep engine coolant at recommended level.
b.
Do not fill the fuel tank above full mark on dipstick Allow room for expansion of fuel.
c.
Increase battery PMCS. Distilled water or a good grade drinking water (excluding mineral waters) may be
used to bring electrolytes to proper levels.
2-35. OPERATION IN SALT WATER.
a.
Always keep hatch covers closed.
b.
If available, wash down engines and engine accessories with fresh water. Wipe dry the exteriors of engines
and engine accessories after each operation.
c.
Keep engine and hydrojet compartments as dry as possible.
d.
Check hull frequently for signs of corrosion. Corrosion is likely to occur at exhaust, vent, and drain openings,
and areas subject to wear. Signs of corrosion and bare spots on painted surfaces should be taken care of as
soon as possible.
e.
Frequently inspect the lights, bilge pumps, fire extinguishers, electrical connections, and lines for signs of
corrosion or salt accumulator. Wipe items frequently.
2-103/(2-104 blank)
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