Page H-6
FUEL & AIR SYSTEM
Repair and Service Manual
Read all of Section B and this section before attempting any procedure. Pay particular attention to all Notices, Cautions and Warnings.
B
FUEL PUMP
The fuel pump is mounted on the gasoline tank on the
passenger side and is operated by crankcase pressure
impulses from the engine. As the piston moves up in the
cylinder, a negative pressure moves the diaphragm
within the fuel pump. This movement draws fuel from the
fuel tank into the fuel pump chamber. This action also
closes the outlet valve which prevents fuel back flowing
from the carburetor.
As the piston move down in the cylinders, a positive
pressure is formed in the crankcase which causes the
diaphragm to move in the opposite direction (away from
the engine). This action forces the inlet valve to close
and the outlet valve to open and supply fuel to the car-
buretor float bowl.
Fuel Pump Replacement
Tool List
Qty.
Socket, 3/8" ................................................................. 1
Ratchet ........................................................................ 1
Pliers............................................................................ 1
Straight Blade Screwdriver ..........................................1
Fig. 8 Fuel Pump
Do not confuse pulse and fuel lines. Attempting to oper-
ate engine with lines reversed will result in fuel entering
the crankcase and diluting the oil and possible engine
damage.
The length of the pulse hose from the fuel pump is important
for efficient pump operation. If the hose is to be replaced, be
sure to replace with a hose of the same length and approved
material.
Observe and identify the supply and pulse hoses, (on
the vehicles equipped with a fuel shut off valve, turn the
valve to the "off" or closed position). Remove the hoses,
plug the fuel lines and remove the fuel pump by unsnap-
ping it from the gasoline tank
Installation is in the reverse order of disassembly. Be
sure to connect the pulse line to the correct location on
the pump (turn the valve to the "on" or open position).
(Ref. Fig. 8).
Fuel Lines, Filter And Shut Off Valve
Tool List
Qty.
Pliers............................................................................1
Straight Blade Screwdriver ..........................................1
Fuel is supplied to the fuel pump and carburetor through
flexible fuel hoses. An in-line filter (1) and shutoff valve
(2) are installed in the hose between the fuel tank (3)
and the fuel pump (4) (Ref. Fig. 9).
Fig. 9 Fuel Lines, Filter and Shut Off Valve
To prevent possibility of personal injury, tests
that involve fuel flow should be avoided if at all
possible. If a test to determine fuel/vapor pres-
ence or flow is required, the ignition system
must be disabled. Remove the input wire to the
Fuel Line To
Carburetor
Fuel Line To
Fuel Filter
Pulse Line To
Crankcase
Fuel Line To
Gas Tank
NOTICE
1
3
4
2
Summary of Contents for RXV GASOLINE
Page 1: ...RXV GASOLINE SERVICE REPAIR ISSUED FEBRUARY 2009 REVISED APRIL 2010 611104...
Page 6: ...Page iv Repair and Service Manual TABLE OF CONTENTS Notes...
Page 10: ...Repair and Service Manual Page viii SAFETY INFORMATION Notes...
Page 178: ...Page T 4 Repair and Service Manual VEHICLE WARRANTIES Notes...
