Honda EB12D Owner's Manual page 54

Before storing the generator for an extended period:
1. Be sure the storage area is free of excessive humidity and dust.
2. Clean the generator.
3. Check the generator according to the maintenance schedule (see page
42) and repair/replace any items as necessary.
4. Fill the fuel tank with fresh diesel fuel (see page 25).
5. Fully charge the battery. Recharge the battery once a month.
6. Cover the generator and place it in a well ventilated and dry area.
Before starting the engine after storage:
1. Change the engine oil (see page 43).
2. Fully charge the battery.
3. Remove the radiator cap and check the coolant level. Add as necessary
(see page 27).
4. Start the engine and allow it to warm to operating temperature before
applying a load to the generator.
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