Owners manual

ManualsBrandsHolley Performance ManualsAutomotive712-815-1 Marine Electric Fuel Pump

ELECTRIC FUEL PUMPS

P/N 12-801-1, 712-801-1, 12-802-1, 712-802-1, 12-812-1, 12-815-1, & 712-815-1

FUEL PRESSURE REGULATORS

P/N 12-803, 12-803BP, & 12-804

Installation Instructions 199R7914-3

NOTE: 12-803BP IS NOT TO BE USED WITH MECHANICAL FUEL PUMPS!

WARNING! These instructions must be read and fully understood before beginning the installation. Failure to follow

these instructions may result in poor performance, vehicle damage, personal injury, or death. If these

instructions are not fully understood, installation should not be attempted.

APPLICATIONS:

P/N

DESC

FLOWS

PRESSURE

REGULATOR

ALC /

METH

COMPAT.

PRESET

PRES-

SURE

SAFETY

SWITCH

SHUT-OFF

12-801-1

Red Electric

Fuel pump,

Street Perf.

97 gph (free flow)

67 gph at 5 psi

Not required for

most applications

7 PSI

Recommended

(P/N 12-810)

712-801-1

Red Electric

Fuel Pump,

Marine

97 gph (free flow)

67 gph at 5 psi

Not required for

most applications

7 PSI

Recommended

(P/N 12-810)

12-802-1

Blue Electric

Fuel Pump,

Competition

110 gph (free flow)

70 gph at 9 psi

High pressure

(12-803 provided)

14 PSI

Recommended

(P/N 12-810)

712-802-1

Blue Elec. Fuel

Pump, Comp.

Marine

110 gph (free flow)

70 gph at 9 psi

High pressure

(12-803 provided)

14 PSI

Recommended

(P/N 12-810)

12-812-1

Blue Electric

Fuel Pump,

Competition

110 gph (free flow)

70 gph at 9 psi

High pres. (use 12-803)

High press. bypass

(use 12-803BP)

14 PSI

Recommended

(P/N 12-810)

12-815-1

Black Elec.

Fuel pump,

Pro Series

140 gph (free flow)

120 gph at 9 psi

Requires

P/N 12-704

Yes

14 PSI

Recommended

(P/N 12-810)

712-815-1

Black Elec.

Fuel pump,

Pro Series

Marine

140 gph (free flow)

120 gph at 9 psi

Requires

P/N 12-704

Yes

14 PSI

Recommended

(P/N 12-810)

P/N

DESCRIPTION

PRESSURE

RANGE

INLET/OUTLET

SIZE

RESTRICTION

12-803

Carbureted Fuel Regulator

4-1/2 to 9 PSI

3/8” NPT Ports

.220” (7/32”)

12-804

Carbureted Fuel Regulator

1 to 4 PSI

3/8” NPT Ports

.220” (7/32”)

12-803BP

Carbureted Bypass Regulator

4 to 7 PSI

3/8” NPT Ports

.312” (5/16”)

INTRODUCTION:

Congratulations on your purchase of the Holley Fuel Pump or Holley Regulator! Holley Performance Products cannot and will

not be responsible for any alleged or actual engine or other damage, or other conditions resulting from misapplication of the

parts described herein. However, it is our intent to provide the best possible products for our customer; products that perform

properly and satisfy your expectations. Should you have any questions, please call Tech Support at 1-866-GOHOLLEY, M-F,

8-6 CST. Please have the part number on hand of the product when you call.

The electric fuel pump in this instruction sheet is of the vane rotor type. Holley makes three versions: a low-pressure pump

meets the flow requirements of most passenger vehicles. The high-pressure pump is used mainly for high performance

applications and comes with a fuel pressure regulator. The second high-pressure pump allows an even higher flow rate and is

alcohol and methanol compatible, but contains no fuel pressure regulator. A separate fuel pressure regulator must be

purchased. The mounting holes are untapped on the above Holley regulators. Use the supplied self-tapping screws.

PUMP MOUNTING AND INSTALLATION:

The best location for mounting any electric fuel pump is the rear of the vehicle. The inlet and outlet of the pump must be

mounted below the lowest point of the tank. This is necessary to allow for an adequate fuel supply. The pump is designed to

push fuel and not designed to suck fuel out of the tank. It needs to be gravity-fed or if it’s pulling from the top of the tank, it

needs to develop a siphon feed to the pump. The pump should be mounted on the chassis, in a vertical position with the pump

Summary of content (6 pages)

PAGE 1
ELECTRIC FUEL PUMPS P/N 12-801-1, 712-801-1, 12-802-1, 712-802-1, 12-812-1, 12-815-1, & 712-815-1 FUEL PRESSURE REGULATORS P/N 12-803, 12-803BP, & 12-804 Installation Instructions 199R7914-3 NOTE: 12-803BP IS NOT TO BE USED WITH MECHANICAL FUEL PUMPS! WARNING! These instructions must be read and fully understood before beginning the installation. Failure to follow these instructions may result in poor performance, vehicle damage, personal injury, or death.
PAGE 2
motor on top. Avoid exposure of the pump and fuel lines to moving parts and to any hot areas, such as the exhaust manifold. The pump should not be mounted in a closed area, such as the vehicle’s trunk. Follow the steps below for mounting the pump. WARNING! THE PUMP MUST BE LOCATED SO THAT INTERFERENCE BETWEEN THE VEHICLE’S BODY AND ITS CHASSIS MOVEMENT IS AVOIDED. THE PUMP AND ITS CONNECTING HOSES MUST NOT BE SUBJECTED TO LOW GROUND CLEARANCE, WHERE ANY FLYING ROCKS OR ROAD DEBRIS CAN CAUSE DAMAGE.
PAGE 3
Figure 1 Figure 2 Figure 3 4. Connect the fuel line from the “out” side of the pump to the “in” side on the regulator. All fuel line connections must be leakproof. 5. Connect the other line per Figure 2 or 3. 6. The regulator comes from Holley with the regulator pressure preset (see table). However, for individual requirements, it may be readjusted. Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure.
PAGE 4
Figure 3 WIRING THE FUEL PUMP WITH A RELAY: NOTE: You will need Holley Fuel pump relay kit P/N 12-753 or equivalent 4-wire relay. 1. Disconnect the cables from the battery. 2. Mount relay on firewall of engine compartment using a sheet metal screw. WARNING! Before punching or drilling a hole in the firewall, make sure you know what is on the other side to avoid puncturing equipment such as heater cores, air-conditioning system equipment, hoses, or wiring. 3.
PAGE 5
2. Remove the original equipment oil pressure switch and retain. 3. Screw a 1/8” pipe nipple into the hole from which the original pressure switch was removed. Use any suitable thread sealant on all fittings, taking care to avoid any excess that might contaminate the engine. 4. Screw a 1/8” pipe tee onto the nipple and position it in a manner to facilitate the installation of the original oil pressure switch and the new oil pressure safety switch in the remaining two holes. 5.
PAGE 6
CLEANING THE PUMP: The following is a step-by-step procedure for cleaning the Holley electric fuel pumps. Do all disassembling on a clean bench. Read all instructions thoroughly and completely before starting. 1. Remove the pump from the car. 2. Remove the 5 bolts from the bottom of the pump. 3. Holding the pump in position, remove the bottom plate. Remove the upper plate gasket and rotor stop plate.