9-1
Chapter 9 LONG-TERM STORAGE
Storing Engine in an Inoperable Condition for 3 Months
up to 1 Year
Preparation for Storage
1. Drain engine oil and fill the engine with new oil.
2. Prepare a fuel mixture containing 50% rust-preventive fuel (NP-9), and fill the fuel tank with it.
3. Run the engine at no load idle speed for 5 to 10 minutes.
4. Immediately before stopping the engine, spray volatile corrosion inhibitor (VCI) (approx. 1g for example) through
the inlet port to prevent rust on the air intake system.
5. Stop the engine and drain mixed fuel from the fuel tank.
6. Fill the fuel tank and apply anti-rust treatment to the fuel tank.
However, for FRP tank, this treatment is not necessary.
7. Apply a sufficient quantity of anti-rust oil (NP-3-2) to the machined exposed surfaces.
8. Cover the air inlet, exhaust outlet, breather, etc., with an adhesive cloth tape or plastic film.
9. Loosen the belt.
10. Apply a thin coat of grease to the terminals of starter and alternator, and cover the openings. Cover the openings
with polyethylene sheet or processed polyethylene paper, and place desiccants inside.
11. 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.
12. Cover the whole engine.
Note: (a) Store the engine in a well-ventilated and dried indoor area.
(b) It is not necessary to drain coolant since it contains LLC. (LLC must be the specified concentration. For LLC
concentration, refer to "LLC Concentration (GLASSY, PG GLASSY)" (6-7).
(c) Post a sign at an easily noticeable place to warn that the fuel tank must be filled before operating the engine
for the first time after storage.
Recommended Rust-Preventive Oil and Corrosion Inhibitor
If the engine is not in use for more than 3 months, the internal engine parts can rust, and it may cause damage to
the engine.
If the engine is being stored for an extended period of time, be sure to follow the instructions below.
Table 9-1 Table of Recommended Rust-Preventive Oil and Corrosion Inhibitor
JIS No. Recommended product Usage
K2246
NP-3-2
Nippon Oil Corporation
Anti Rust P-1600
Prevention of rust on exposed
machined surfaces
NP-9
Nippon Oil Corporation
Anti Rust P-2400
Prevention of Rust in Fuel Sys-
tem
Z1519 -
Ryoukou Chemi-
cal.Co.,Ltd.
VCI Diana ND volatile
corrosion inhibitor
Prevention of rust in air intake
system
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