High Altitude Engine Operation; Battery - Yamaha EF12000DE Owner's Manual

HIGH ALTITUDE ENGINE OPERATION

Please have an authorized Yamaha dealer modify this engine if it is to be run con-
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tinuously above 5000 feet (1500 meters). Failure to do so, may result in poor
engine performance, spark plug fouling, hard starting, and increased emissions.
I Carburetor modification by an authorized Yamaha dealer will improve perfor-
mance and allow that this engine meets EPA (Environmental Protection Agency)
and California ARB (Air Resources Board) emission standards throughout its
useful life.
An engine converted for high altitudes can not be run at 5000 feet or lower. In
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doing so, the engine will overheat and cause serious engine damage. Please
have an authorized Yamaha dealer restore high altitude modified engines to the
original factory specification before operating below 5000 feet.
AE00633

BATTERY

1. Remove the battery.
2. Check the fluid level. Add only distilled water if necessary.
(See page 31 "BATTERY–Replenishing the battery fluid")
3. After checking the fluid level, charge the battery.
4. Store the battery in a cool, dark and dry place.
Do not store the battery in an excessively warm or cold place [i.e., less than
0°C (30°F) or more than 30°C (90°F)].
5. Check battery condition with a hydrometer monthly, and charge as necessary.
WARNING
I Disconnect the negative lead first, then the positive lead from the battery.
Connect the positive lead first, then the negative lead to the battery when
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installing the battery.
I Never smoke or make and break connections at the battery while charging.
Sparks may ignite the battery gas.
Be sure the battery terminals are tight and that the battery vent tube is prop-
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erly routed and is securely attached to the battery.
NOTICE
Do not disconnect the battery during engine operation.
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Avoid operating the generator with the battery removed.
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