Generac Power Systems 0661-5 - Manual (Page 23)

GASOLINE FUEL SYSTEM
Installing a gasoline fuel system (Figure 25) for recre­
ational vehicle generator sets must comply with
applicable codes, standards and regulations. The
entire fuel system must be completely free of leaks.
There must be no possibility of gasoline vapors enter­
ing the vehicle interior.
Figure 25 — Generator Fuel System
FUEL INLET
CARBURETOR FUEL PUMP
DANGER: Gasoline is highiy fiammable and its
vapors are explosive. Compiy with aii codes, stan­
dards and regulations pertaining to gasoline fuel
systems used in recreational vehicle 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 filter, (b) 12-volt DC electric pump, (c)
engine carburetor, and (d) interconnecting lines and
fittings. Connect a fuel supply line to the fuel filter
inlet. Use a flexible length of approved fuel hose
between the fuel filter inlet connection and rigid fuel
lines.
FUEL TANK
Either the generator must share the vehicle engine's
fuel tank, or you must install a separate fuel tank for
the generator set. All fuel tanks installed on the vehi­
cle must be constructed, installed, and restrained so it
complies with applicable codes, standards and regu­
lations.
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 fuel supply line. If this
is done, the generator will 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 supply line,
making it difficult to start the vehicle engine.
GENERATOR FUEL SUPPLY LINE
RIGID FUEL LINES
Those lines used to supply fuel from a tank to the
generator must comply with applicable codes, stan­
dards and regulations. The following general 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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