THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
2-20
Effective 01/01/08
Table 2-1: ENGINE PRESERVATION PROCEDURES
(Continued)
Engine Installed:
OPERATION PROCEDURE
10 to 30
Days
Over 30
Days
Engine
not
Installed:
Carburetor
When a carburetor is to be out of service for
a period exceeding 10 days, prepare for
storage in accordance with one of the
methods outlined in the following
instructions. Use Naphtha for cleaning.
Use engine oil for preservation purposes.
Remove the carburetor from the engine;
then remove the drain plug in the bottom of
the flat bowl, and drain all gasoline from the
carburetor through this opening and the
carburetor fuel inlet. A few strokes of the
throttle lever will pump out any gasoline that
may have collected in the accelerating
pump system.
After the carburetor has been drained
thoroughly, place the carburetor on its top
flange. Install a fitting in the carburetor
drain and attach an oil line. Pump in
slushing oil until the oil flows from the
discharge nozzle. The slushing oil pressure
applied to the carburetor should not exceed
3 to 4 pounds per square inch. If a pump is
not available, the oil may be poured in
providing precautions are taken to ensure
complete slushing.
When the oil flows from the discharge
nozzle, disconnect the oil line and replace
the drain plug. Set the carburetor in an
upright position and operate the throttle
lever until oil is discharged from the
accelerating pump discharge nozzle.
Place the throttle valve in the closed
position and adjust the throttle stop to obtain
the maximum throttle opening; then lockwire
the throttle valve in this position against the
stop.
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