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HIGH ALTITUDE OPERATION ABOVE 3000 FEET
The fuel system on this generator may be affected by op-
eration at high altitudes. Proper operation can be ensured
by installing an altitude kit at altitudes higher than 3000
feet above sea level. At elevations above 8000 feet, the en-
gine may experience a decrease in performance, even with
the proper altitude kit. Operating this generator without the
high altitude kit at elevations above 3000 feet may increase
the engine’s emissions and decrease both fuel economy
and performance.
INSTALLING THE HIGH ALTITUDE KIT
This kit should be installed by a qualified mechanic. Con-
tact customer service at
1-800-232-1195
(M-F 8-5 CST),
or email
for information
about service centers near you.
Gather the parts in the high altitude kit. Refer to page. 9.
1. Flip the engine switch to the STOP position.
2. Turn the fuel valve to the OFF position.
3. Prepare an approved gasoline-storage container to catch
any spilled fuel. Place it near the fuel valve.
4. The carburetor can be accessed from the backside of the
generator between the engine and the air filter. Loosen the
bolt (Fig. 2) on the bottom of the carburetor with a Phillips-
head screwdriver (not included).
CAUTION! The carburetor
bowl may have gas in it which will leak upon removing
the bolt.
5. Remove the bolt, bolt seal, fuel cup, fuel cup seal, and
main jet from the body of the carburetor assembly. Refer
toSee Fig. 2.
6. Replace the main jet with the replacement jet needed for
your altitude range (3000-6000 ft or 6000-8000 ft).
NOTE:
The fuel cup seal and bolt seal may be damaged during
removal and should be replaced with the new ones from
the kit.
7. Reassemble the fuel cup seal, fuel cup, bolt seal, and
bolt. Tighten with a Phillips-head screwdriver to secure.
ASSEMBLY & ADJUSTMENTS
10
WARNING!
To prevent serious injury from
fire, follow the kit installation procedures in a
well-ventilated area away from ignition sources.
If the engine is hot from use, shut the engine off
and wait for it to cool before proceeding. Do not
smoke near the generator. Warranty will be void
if adjustments are not made for high altitude use.
CAUTION!
UNINSTALL the high altitude kit when
operating at altitudes below 3000 feet.
Fig. 2
Carburetor
Assembly
Fuel Cup Seal
Fuel Cup
Main Jet
Bolt Seal
Bolt
CAUTION!
UNINSTALL the high altitude kit when
operating at altitudes below 3000 feet.
8. Wipe up any spilled fuel and allow excess to evaporate before starting the engine.
WARNING! To prevent fire,
do not start the engine while the smell of fuel hangs in the air.
Summary of Contents for GN400i
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