LYCOMING OPERATOR’S MANUAL SECTION 7
O-360 AND ASSOCIATED MODELS INSTALLATION AND STORAGE
a. As soon as possible after the engine is stopped, move the aircraft into the hangar, or other shelter
where the preservation process is to be performed.
b. Remove sufficient cowling to gain access to the sparkplugs and remove both sparkplugs from each
cylinder.
c. Spray the interior of each cylinder with approximately two (2) ounces of corrosion preventive oil
while cranking the engine about five (5) revolutions with the starter. The spray gun nozzle may be
placed in either of the sparkplug holes.
NOTE
Spraying should be accomplished using an airless spray gun (Spraying Systems Co.,
“Gunjet” Model 24A-8395 or equivalent). In the event an airless spray gun is not available,
personnel should install a moisture trap in the air line of a conventional spray gun and be
certain oil is hot at the nozzle before spraying cylinders.
d. With the crankshaft stationary, again spray each cylinder through the spark plug holes with
approximately two (2) ounces of corrosion preventive oil. Assemble spark plugs and do not turn
crankshaft after cylinders have been sprayed.
The corrosion preventive oil to be used in the foregoing procedure should conform to specification MIL-
L-6529, Type 1, heated to 200°F/220°F (93°C/104°C) spray nozzle temperature. It is not necessary to flush
preservative oil from the cylinder prior to flying the aircraft. The small quantity of oil coating the cylinders
will be expelled from the engine during the first few minutes of operation.
NOTE
Oils of the type mentioned are to be used in Lycoming aircraft engines for corrosion
prevention only, and not for lubrication. See the latest revision of Lycoming Service
Instruction No. 1014 and latest revision of Service Bulletin No. 318 for recommended
lubricating oil.
7-3
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