7-1
Chapter 7
LONG-TERM STORAGE
Long-term storage
The following describes the method to store the
engine in a non-operable condition for more than
three months and the method for storing the engine
in an operable condition for more than three
months.
If the engine is not properly prepared for a long-
term storage of more than three months, internal
engine parts can rust and become damaged. Be
sure to follow the directions below when storing the
engine for an extended period of time.
Storing Engine in Non-operable
Condition for More Than 3 Months
Preparation for Storage
1 Drain engine oil, and pour rust-preventive oil
(NP-10-1 to NP-10-3) into the engine.
2 Prepare a fuel mixture containing 50% rust-pre-
ventive oil (NP-9), and pour it into the fuel tank.
3 Operate the engine at a speed of 800 to 1000
min
-1
(idling) for 5 to 10 minutes under no load.
4 Immediately after stopping the engine, spray
volatile corrosion inhibitor (V.C.I.) through the
inlet side to prevent rust on the air intake sys-
tem.
5 With the engine not in operation, drain the fuel
mixture from the fuel tank.
6 Apply rust-preventive oil (NP-3) liberally on the
exposed sections of the machine.
7 Seal air inlet, exhaust outlet, breather and other
openings with adhesive cloth tape.
8 Loosen the V-belt.
9 Wrap adhesive cloth tape on the terminals of the
starters and alternator, and seal the openings.
Cover these sections with polyethylene sheet or
processed polyethylene paper, and place desic-
cants in the polyethylene covers.
10 Disconnect cables from the battery terminals,
and charge the battery. Clean the terminals,
apply a thin coat of grease, and store them in a
cool and dry room.
11 Cover the entire engine.
Note:(a) Store the engine in a well-ventilated indoor
location.
(b) Coolant does not need to be drained since
it contains long life coolant. (Add long life
coolant to increase the concentration
between 30 and 60%.)
(c) Post a sign at an easily noticeable location
to warn that the rust-preventive oil in the
engine must be replaced with engine oil
and the fuel tank must be filled with fuel
before operating the engine.
(d) New engine oil may be used in place of
rust-preventive oil (NP-10-1 to NP-10-3).
Maintenance during Storage
Charge the battery once a month.
After checking proper electrolyte level in the bat-
tery, charge the battery.
Table 7-1 Recommended Rust-preventive
Oil and Corrosion Inhibitor
JIS No.
Recommended
product
Application
K2246
NP-3
Nippon Oil Corpo-
ration
Anti Rust P-1400
Prevention of
rust on
exposed
machine sur-
faces
NP-9
Nippon Oil Corpo-
ration
Anti Rust P-2100
Prevention of
rust on fuel
system
NP-10-
2
Nippon Oil Corpo-
ration
Anti Rust P-230
Prevention of
rust on lubri-
cating sys-
tem
Z1519
-
Ryoukou Kagaku
V.C.I.Diana
volatile corrosion
inhibitor
Prevention of
rust on air
intake sys-
tem
