9-1
Chapter 9 LONG-TERM STORAGE
Storing the engine in an inoperable condition for 3
months or more
Preparation for storage
1. Drain the engine oil in-use, pour new oil.
2. Prepare a fuel mixture containing 50 % rust-preventive oil (NP-9), and fill the fuel tank with it.
3. Run the engine at low idling speeds for 5 to 10 minutes.
4. Immediately before stopping the engine, spray volatile corrosion inhibitor (VCI) through the inlet port to prevent
rust on the air intake system.
5. With the engine stopped, drain the fuel mixture from the fuel tank.
6. Apply rust-preventive oil (NP-3) liberally on the exposed sections of the machining.
7. Seal the air inlet, exhaust outlet, breather and other openings with an adhesive cloth tape.
8. Loosen the belt.
9. Wrap adhesive cloth tape on the terminals of the starters and alternator, and seal the openings. Cover these sec-
tions with polyethylene sheet or processed polyethylene paper, and place desiccants in the polyethylene covers.
10. Disconnect the cables from the battery terminals, and charge the battery. Clean the terminals, apply a thin coat
of grease to the terminals, and store the battery in a cool and dry room.
11. Cover the whole engine.
Note: (a) Store the engine in a well-ventilated indoor area.
(b) It is not necessary to drain coolant since it contains LLC. (LLC must be specified concentration. For LLC
concentration, refer to "LLC concentration" (6-5).)
(c) Post a sign at an easily noticeable place to warn that the fuel tank must be filled with fuel before operating
the engine for the first time after storage.
Recommended rust-preventive oil and corrosion inhibitor
Maintenance during storage
Charge the battery once a month. First, check the battery electrolyte for proper level and then charge the battery.
If the engine has been left unattended for 3 months or more, the internal engine parts can rust, and that may cause
damage to the engine.
When storing the engine for an extended period of time, be sure to follow the directions below.
Table 9-1 Recommended rust-preventive oil and corrosion inhibitor
JIS No. Recommended product Application
K2246
NP-3
Nippon Oil Corporation
Anti Rust P-1600
Prevention of rust on exposed
machine surfaces
NP-9
Nippon Oil Corporation
Anti Rust P-2400
Prevention of rust in fuel system
Z1519 -
Ryoukou Kagaku
VCI Diana ND volatile
corrosion inhibitor
Prevention of rust in air intake
system
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