agent drum or large container in the natural water source.. Place the foot valve end of the suction hose
in the bottom of the submerged container to minimize the danger of drawing mud or bottom silt into the
M12A1 PDDA (Figure 28). To avoid forcing the foot valve against the bottom of the container by the
suction force, place the foot valve at an angle in the container.
Step 6. Be sure the exhaust pipe extensions are attached to the mufflers on both sides of the engine.
Step 7. Pull the throttle out until it reaches the end of travel. Then push it in approximately half the
distance it was pulled out. Press in the low oil pressure switch and hold it; then turn the start-magneto
switch to the START position. Hold the low oil pressure switch in until the oil pressure gage indicates
20 psi or more. Then release the oil pressure switch. As soon as the engine starts, release the start-
magneto switch, which will go to the spring-loaded RUN position. If the engine fails to start, pull out
the choke and try again. Push the choke back is when the engine starts.
The gasoline engine exhaust fumes are lethal. Do NOT inhale these
fumes. A mask does not protect against carbon-monoxide fumes from the
engine. When the M12A1 PDDA is to be operated, the exhaust fumes
must be vented away from the operator to prevent carbon-monoxide
Figure 28. Hose connections for loading the tank unit from a natural water source.