Bush Hog Utility Vehicles Instruction manual

BUSH HOG®UTILITY VEHICLE WORKSHOP MANUAL – SECTION 4: FUEL SYSTEM
4-1
SECTION 4: FUEL SYSTEM
SECTION 4 – FUEL SYSTEM
SPECIFICATIONS........................................................................... 4-2
TOOLS ........................................................................................... 4-3
SAFETYFIRST............................................................................... 4-3
DESCRIPTION ................................................................................ 4-4
COMPONENTLOCATOR ............................................................... 4-5

BUSH HOG®UTILITY VEHICLE WORKSHOP MANUAL – SECTION 4: FUEL SYSTEM
4-2
SPECIFICATIONS
FUEL SYSTEM
Type Gasoline
Style Carburetor
AirCleaner Remote, 2-stage cyclone-type with replaceable dual elements
Fuel Capacity 7 gallons
FuelFilter InlineFilter
Throttle Control Throttle Pedal and Cable

BUSH HOG®UTILITY VEHICLE WORKSHOP MANUAL – SECTION 4: FUEL SYSTEM
4-3
TOOLS
Commonhandandshop toolscan beused toremove andinstall fuelsystem componentsserviced inthe section.
SAFETY FIRST
CAUTION
Gasoline is extremely flammable.
• Always shut down the engine and allow the engine to cool before refueling.
• Do not smoke, light matches, or use lighters while refueling.
• Use only approved containers to carry or dispense gasoline, set the container on the
ground during fill, do not place the container is an enclosed area such as a trunk. Do
not fill on the bed of a truck.
• Keep nozzle in contact with the container to prevent static electric ignition of fuel vapors.
• Remove fuel soaked clothing immediately.
• Keep machine fuel tank cap vent clear and open.
CAUTION
Use only safety approved and labeled containers for fuel storage and transportation.
Do not store gasoline in glass or unapproved containers.
• Fill the container at a slow rate to decrease chances of vapor ignition.
• Manually control fuel dispensing to avoid splashing and overfill.
• Fill container only 95 percent to allow for expansion.
• Gasoline will cause skin irritation. Keep face and skin away from gasoline. Do not
use gasoline to wash hands.
• Do not siphon gasoline.
• Avoid prolonged breathing of gasoline fumes.
• When transporting gasoline make sure container is secure and cannot tip, slide, or fall.
CAUTION
FUEL
Do not use fuels (gasoline) that exceed E10 (10%) ethanol. Fuel exceeding 10%
ethanol helps corrode metals, degrade and permeate fuel hoses, plastics and other
materials; causes engine to run hot and adversely affect durability and emissions;
attracts water into the fuel and causes fuel to separate into gasoline and water
layers which causes poor engine performance and starting. Excessive ethanol in
fuel also causes fuel tank and fuel hose leaks and possible fire.

BUSH HOG®UTILITY VEHICLE WORKSHOP MANUAL – SECTION 4: FUEL SYSTEM
4-4
DESCRIPTION
NOTICE: The engine manufacturer has included the engine carburetors, fuel pump and components in
their service manual. See the manufacturer’s manual for fuel system diagnostics and repair.
The machine uses a 7-gallon composite type fuel tank to storage fuel for
theengine.Thefueltankis mountedunderneaththe operator’sseat.
CAUTION
Use only approved fuel hose for routing fuel to the
engine. Rubber hoses not intended for fuel can
deteriorate quickly causing leaks and contamination of
the engine fuel system.
A fuel hose is connected between the fuel tank outlet and an inline
fuel filter. The filter is connected to the carburetor with a fuel hose.
The filter must be changed on a regular basis to prevent
contamination or plugging of the fuel system. See the operator’s
manualforfilterreplacementschedules.
A dual element air cleaner is mounted on the right side of the
machinebelow theoperator’sseat. Theouterelement preventsdust,
dirt, and contaminates from entering the engine fuel system. The
inner element acts as a safety filter to prevent minute particles from
entering the fuel system.
During engine operation a cyclonic type action takes place in the air
cleanerhousing forcingcontaminatesaway fromthe elementsand
intoarubber flappervalvemounted onthedownside ofthecleaner
assembly.Thisvalveautomaticallydumpscontaminatesduring
operation.Theflappervalveshouldbeinspectedregularlyand
cleaned or replaced as necessary.
A float type fuel level sending device is mounted in the fuel tank.
The sender is a variable resistor that changes value as the float falls
or rises and transmits a regulated ground to the fuel gauge. The fuel
gaugehasconstant 12DCvolts of switchedpower andis regulated
by the application of the ground from the sending unit.
Athrottle pedalmountedunderneaththe dashboardonthe leftsideof
themachine allowstheoperator tocontrolengine fuelsupplyfor travel
speeds. A throttle cable connects the pedal to the carburetor linkage.

BUSH HOG®UTILITY VEHICLE WORKSHOP MANUAL – SECTION 4: FUEL SYSTEM
4-5
THROTTLELINKAGE
THROTTLEPEDAL
FUELFILTER
FLAPPERVALVE
ENGINETHROTTLE
LINKAGE
AIRCLEANER
FUELTANK
FUELLEVELSENDER
COMPONENT LOCATOR