Lycoming IO-390-D Series Installation And Operation Manual page 32

13. Examine the fuel supply lines, fuel manifold, and throttle body, to make sure they are clean and
dry.
NOTICE: During the first 50 hours of engine operation of new, rebuilt, or overhauled engines, it is
recommended that this engine be operated with mineral oil until oil consumption has
stabilized.
14. Add mineral oil to a new, rebuilt, or overhauled engine. Refer to Appendix A for the oil capacity.
Refer to the "Add Oil" procedure in the "Engine Installation" chapter in this manual.
15. Use the correct disposal procedure for collected oil in accordance with local regulations and
environmental protection policy.
Prepare a Stored Engine for Installation
NOTICE: If the engine had been stored at temperatures below 10°F (-12°C), put the engine in an
environment of at least 70°F (21°C) for 24 hours before completing this depreservation
procedure. If this thawing is not possible, apply heat to cylinders with heat lamps.
Since an engine in storage has preservative oil, complete this depreservation procedure to prepare the
engine for installation into the airframe:
1. Lift the engine. Refer to the section "Lift the Engine" in the "Engine Reception and Lift" chapter
in this manual.
2. Put a container under the engine to collect the cylinder preservative oil.
CAUTION DO NOT TURN THE CRANKSHAFT OF AN ENGINE WITH
PRESERVATIVE OIL BEFORE REMOVAL OF THE SPARK PLUGS.
ENGINE DAMAGE CAUSED BY HYDRAULIC LOCK CAN OCCUR.
3. If the engine has been preserved and/or has been in long-term storage, remove the items used in
preservation as follows:
A. Remove and discard the seals.
B. Remove tape residue with solvent.
C. Remove and discard the dehydrator plugs (if installed).
D. Remove and discard the clay desiccant bags for the intake and exhaust ports.
NOTICE: If any of these plugs break and the crystals fall into the engine, complete the following
procedure per the IO-390-D Series Engine Maintenance Manual.
• Disassemble the engine
• Clean the engine
4. Examine the engine for any damage.
5. If the engine is not damaged, go to the next step. If damage is found, identify and correct or
repair the problem. Record findings and corrective action in the engine logbook.
6. Remove the spark plugs or protective plugs from the top and bottom spark plug holes per
instructions in Chapter 74-20 in the IO-390-D Series Engine Maintenance Manual.
7. Remove any other moisture-prevention seals and covers from the engine.
Requirements for Engine Installation
Page 12
IO-390-D Series Engine Installation and Operation Manual
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March 2020