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IO-390-D Series Engine Installation and Operation Manual
6. Drain the fuel pump:
A. Put a collection container underneath the fuel pump.
B. Remove the shipping caps installed on the fuel pump.
C. Let any preservative fluid drain from the fuel pump into a collection container.
D. Remove the collection container.
E. Reinstall the shipping cap on the main fuel inlet on the fuel pump.
F. Install all shipped loose components of the fuel system.
G. Connect the fuel lines to all fuel system components. Refer to Chapter 73-10 in the IO-390-D
Series Engine Maintenance Manual.
7. Remove the plug in the
induction system (Figure 1).
8. Drain any preservative oil
from the induction system.
9. Install the fuel drain valve
adapter assembly (shipped
with the engine as a "Ship
Loose Part") in the
induction system (Figure
2). Refer to Chapter 72-80
in the IO-390-D Series
Engine Maintenance
Manual for installation
instructions.
10. Refer to Chapter 74-20 in the IO-390-D Series Engine Maintenance Manual to:
A. Examine the spark plugs.
B. If spark plugs are acceptable, install them with a new gasket. If the spark plugs are dirty,
clean them per the procedure in Chapter 05-30 of the IO-390-D Series Engine Maintenance
Manual. If the spark plugs are not acceptable, install new spark plugs with a new gasket.
C. Remove the protectors on the ignition lead ends.
D. Connect the ignition lead ends.
11. If a constant speed propeller is used:
A. Use a pointed punch tool to make a 1/8 in. to 3/16 in. hole in the center of the front expansion
plug on the crankshaft.
B. Remove and discard the expansion plug from the crankshaft.
C. Since it is possible a little piece of expansion plug can fall off, look for and remove any
foreign object contamination.
12. Remove the fuel inlet strainer and clean it with a hydrocarbon-based solvent such as mineral
spirits or equivalent. Re-install the fuel inlet strainer.
© 2020 Avco Corporation. All Rights Reserved
March 2020
Figure 1
Plug in the Induction System
Figure 2
Fuel Drain Valve Adapter Assembly
Installed in the Induction System
Requirements for Engine Installation
Page 11
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