LYCOMING OPERATOR’S MANUAL SECTION 7
O-320 SERIES INSTALLATION AND STORAGE
Exterior Surfaces – All exposed cadmium plated and machined surfaces should be coated with soft-film
corrosion-preventative compound (E. F. Houghton and Company, Cosmoline 1059 or equivalent). The
starter ring gear and propeller mounting surfaces in particular should receive a liberal coating of the
compound.
Carburetor – Drain all residual gasoline from the carburetor, fill with flushing oil (MIL-C-16173, Grade 2)
and flush the interior surfaces by rocking the carburetor. Drain excess oil from the fuel passages and replace
plugs. Lock the throttle in the closed position and pack the carburetor in a cardboard container.
Shipping Case – Upon completion of the preceding steps, the engine should be secured in a suitable engine
shipping container. The date of preservation and the following legend should be legibly marked on the side
of the container:
“On (Date) the engine was preserved for 60 days short term storage with preservative oil and
cylinder and crankcase dehydrator plugs shall be inspected on arrival at destination or 30 days after the
above date (whichever occurs sooner) to determine if renewal of the dehydrating agent is necessary.”
4. RECOMMENDED PROCEDURE FOR RE-PRESERVATION. The engine shall be examined every 30
days (or less, depending on weather and locality). If any evidence of corrosion is present, the affected area
should be cleaned free of corrosion and the engine re-preserved.
Engines prepared in the preceding manner are not adequately protected for extended periods of storage. If
at the end of 60 days it is found that the engine must remain in storage for an additional period, the engine
must be re-preserved according to the foregoing procedure.
NOTE
Inspection and re-preservation will not be the responsibility of the engine manufacturer after
engines have been shipped from the engine manufacturer’s plant. It shall be the
responsibility of the consignee to put engines into service in the order of storage preparation
date to reduce the storage period to a minimum.
7-3
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