3-2 Scheduled Maintenance TP-5631 7/96
Fuel Regulators
Fuelregulatorsarecompatiblewithbothnaturalgasand
LPgas. Thespringandretainerareinstalledwhenused
with natural gas.
Somemodelsrequireremovalofthespringandretainer,
while other models maintain the spring and retainer,
when using LP gas. Read and follow the instructions
found on the hang tag attached to the generator set.
SB-527
Figure 3-1. LP Vapor Gas Fuel Regulator
Carburetor Adjustments (LP/Natural Gas)
Somegeneratorsetsmaybeequippedwithanemission
certified engine. Emission certified engines may be
fitted with carburetors that have no adjustments.
To adjust the carburetor, run the generator set at
approximately half-load. Rotate engine fuel mixture
screw clockwise or counterclockwise until the engine
runssmoothly. SeeFigure 3-2. Applyvaryingloadsand
adjust carburetor again (if necessary) to achieve
smooth engine performance at all loads.
TP-5750-3
1
2
3
1. Fuel adjusting screw
2. Lean
3. Rich
Figure 3-2. Fuel Mixture Adjustment (typical)
LP Liquid Withdrawal Fuel System
With the LP liquid withdrawal system, LP fuel in liquid
form is directed under pressure from the tank to a
vaporizer. The vaporizer converts the fuel from a liquid
to a gaseousstate andthenthe LP vaporis drawnoffto
the carburetor. The system also includes a fuel valve
whichshutsoffthefuelflowwhentheengineisstopped.
Contact an authorized service distributor/dealer for LP
liquid withdrawal availability.
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