Generac Power Systems 0940-1 - Manual (Page 26)

GASOLINE FUEL SYSTEM
Installing a gasoline fuel system (Figure 27) for recre­
ational vehicle generator sets must comply with applic­
able codes, standards and regulations. The entire fuel
system must be completely free of leaks. There must
be no possibility of gasoline vapors entering the vehi­
cle interior.
Figure 27 — Generator Fuel System
FUEL INLET
CARBURETOR
FUEL PUMP
DANGER: Gasoline is highly flammable and its
vapors are explosive. Comply with all codes, stan­
dards and regulations pertaining to gasoline fuel
systems used in mobile generators. Properly install
and maintain the fuel system and keep it entirely free
of leaks. Gasoline vapors must not enter the vehicle
interior.
Factory installed generator fuel system components
include (a) fuel filler, (b) 12-volt DC electric pump, (c)
engine carburetor, and (d) interconnecting lines and fit­
tings. Connect a fuel supply line to the fuel filter inlet.
Use a flexible length of approved fuel hose between
the fuel filter inlet connOction and rigid fuel lines.
FUEL TANK
Either the generator must share the vehicle engine's
fuel lank, or you must install a separate fuel tank for
the generator set. All fuel tanks installed on the vehicle
must be constructed, installed, restrained so it com­
plies with applicable codes, standards and regulations.
If the generator is to share the vehicle engine's tank,
separate fuel pickup tubes are required for the engine
and the generator. Generac recommends that you
make the fuel pickup tube 2 to 3 inches shorter than
the vehicle engine's pickup tube. This prevents the
generator from depleting the entire fuel supply during
prolonged generator operating periods.
CAUTION: Do NOT tee the generator fuel supply line
into the vehicle engine fuei suppiy iine. If this is
done, the generator wiil be starved of fuel when
both engines are operating at the same time. Also,
while the vehicle engine is not running, generator
operation may drain the vehicle engine suppiy iine,
making it difficuit to start the vehicie engine.
GENERATOR FUEL SUPPLY LINE
RIGID FUEL LINES
Those lines used to supply fuel from a tank to the gen­
erator must comply with applicable codes, standards
and regulations. The following generator rules apply to
rigid fuel lines:
• Rigid lines should be of annealed, seamless, drawn alu­
minum or steel.
• Lines and fittings must comply with SAE J512F, “Standard
Automotive Fittings”, or with ANSI B126.26 (latest edition).
• Route the fuel line so that at least 2 inches of clearance is
maintained between the line and any exhaust system
parts.
• Do not attach electrical wiring to fuel lines. Route the
wiring so it cannot come into contact with any fuel line.
• Route fuel lines so if they leak, fuel does not drip onto any
electrical or exhaust system parts.
• Use non-ferrous metal straps without sharp edges to
secure fuel lines.
■ FLEXIBLE FUEL LINE_____________________
Use an approved flexible length of fuel hose between
the generator fuel inlet connection and rigid fuel lines.
This prevents breaking of the line caused by vibration,
shifting, settling or movement. The following rules
apply:
• The flexible hose must comply with SAE J30B, “Standard
for Fuel and Oil Hose”. It must be approved for use with
gasoline.
• The hose should be at least 6 inches longer than is need­
ed to prevent the hose from rupturing if the generator shifts
or settles.
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