Mallory Ignition Mallory COMP PUMP SERIES 250 ELECTRIC FUEL PUMP 5250_5250A - Manual (Page 2)

2 www.mrgasket.com MALLORY IGNITION
CARB
FUEL
FILTER
REGULATOR
FUEL
PUMP
FUEL RETURN
FUEL RETURN
PORT
FUEL
FILTER
FUEL
TANK
FIGURE 1
FIGURE 2
FIGURE 3
MOUNTING PROCEDURE
Step 1
Mount the pump as close as possible to the fuel tank in a
well ventilated area with minimal exposure to road debris.
Avoid exposing the pump and fuel lines to moving parts
and hot surfaces, such as the exhaust system.
The pump should be mounted at tank level or below.
NOTE: Increasing distance between pump and tank will
decrease pump efficiency.
Step 2
Using the pump mounting bracket as a template, locate
mounting holes on a solid member, such as the vehicle
chassis. Drill clearance holes for 5/16" bolts. NOTE: To
ensure against a potential fire hazard from pump
flooding, mount the pump in a vertical position with
the motor on top.
See Figure 1.
Step 3
To prolong pump life and efficiency, a high volume fuel filter
such as the Mallory COMP FILTER
® Series 500 Fuel Filter
(Part No. 3500) must be installed between the pump and
fuel tank. Connect #8 AN fuel lines as shown in Figure 2 for
Standard Regulator or #10 AN lines as shown in Figure 3
for Return (Bypass) Style Regulator.
Step 4
Be sure to install one of the Mallory High Volume Fuel
Pressure Regulators between the pump and carburetor.
For maximum efficiency, mount the pressure regulator
as close as possible to the carburetor. See instructions
packaged with the pressure regulator. Make sure all
fittings are tight so that air cannot enter the system.
(WITH STANDARD FUEL PRESSURE REGULATOR)
(WITH REGULAR STYLE FUEL PRESSURE REGULATOR)
FUEL OUTLET
3/4" - 16 (#8AN)
FUEL INLET
3/4" - 16 (#8AN)
FUEL RETURN 3/4" - 16
(MUST BE PLUGGED
WHEN USING A RETURN
[BYPASS] STYLE
REGULATOR
NITRILE O-RING NITRILE O-RING
BYPASS ADJUSTMENT
NOTE: Bypass pressure above
20 psi will make the pump draw
more current and significantly
reduce pump life.
RED (+)
BLACK (–)