Cessna TURBO CENTURION T210M 1978 Pilot Operating Handbook page 168

SECTION 7
AIRPLANE
&
SYSTEMS DESCRIPTIONS
CESSNA
MODELT210M
to the ON position. When the spring-loaded left half of the switch is
released, the right half will remain in the ON position until manually
returned to the off position.
Under hot day-high altitude conditions, or conditions during a climb
that are conducive to fuel vapor formation, it may be necessary to utilize
the auxiliary fuel pump to attain or stabilize the fuel flow required for the
type of climb being performed. In this case, turn the auxiliary fuel pump on
and adjust the mixture to the desired fuel flow. If fluctuating fuel flow
(greater than 5 lbs./hr.) is observed during climb or cruise at high altitudes
on hot days, place the auxiliary fuel pump switch in the ON position to
clear the fuel system of vapor. The auxiliary fuel pump may be operated
continuously in cruise, if necessary, but should be turned off prior to
descent. Each time the auxiliary fuel pump switch is turned on or off, the
mixture should be readjusted.
If
it is desired to completely exhaust a fuel tank quantity in flight, the
auxiliary fuel pump will be needed to assist in restarting the engine when
fuel exhaustion occurs. Therefore, it is recommended that proper opera-
tion of the auxiliary fuel pump be verified prior to running a fuel tank dry
by turning the auxiliary fuel pump ON momentarily and checking for a
slight rise in fuel flow indication.
To ensure a prompt engine restart in flight after running a fuel tank
dry, immediately switch to the tank containing fuel at the first indication of
fuel pressure fluctuation and/ or power loss. Then place the right half of the
auxiliary fuel pump switch in the ON position momentarily (3 to 5
seconds) with the throttle at least 1/ 2 open. Excessive use of the ON
position at high altitude and full rich mixture can cause flooding of the
engine as indicated by a short (1 to 2 seconds) period of power followed by a
loss of power. This can later be detected by a fuel flow indication
accompanied by a lack of power. If flooding does occur, turn off the
auxiliary fuel pump switch, and normal propeller windmilling should
start the engine in 1 to 2 seconds.
If the propeller should stop (possible at very low airspeeds) before the
tank containing fuel is selected, place the auxiliary fuel pump switch in the
ON position and advance the throttle promptly until the fuel flow indicator
registers approximately 1/2 way into the green arc for 1 to 2 seconds
duration. Then retard the throttle, turn off the auxiliary fuel pump, and use
the starter to turn the engine over until a start is obtained.
The fuel system is equipped with drain valves to provide a means for
the examination of fuel in the system for contamination and grade. The
system should be examined before the first flight of every day and after
each refueling, by using the sampler cup provided to drain fuel from the
wing tank sumps, and by utilizing the fuel strainer drain under an access
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