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Tube

Nut

Comp.

Comp.

Ferrule

Gasket

Adapter

Flange

Fitting

(-908)

Fuel Pump

5x O-rings

Pick-Up

Straining

Filter

110021251-1, Rev B        Sheet 1 of 8

Model Number 93901 

Flange Mount Fuel Pump 

Operating and Installation Instructions 

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This product is to be installed only by persons knowledgeable in the repair and modification of vehicle fuel systems 

and general vehicle systems modification.  Only a qualified technician or mechanic who is aware of applicable 

safety procedures and fabrication skills should perform the installation of this product. 

This fuel pump utilizes an electronic DC motor system that is not typical of conventional fuel pumps, and therefore 

extra precautions must be adhered to as contained in instructions herein 

GASOLINE AND OTHER FUELS ARE FLAMMABLE AND CAN BE EXPLOSIVE!

Perform the installation in a well ventilated location only to minimize the build up of fuel vapors.  

NO

 open flames, 

smoking or other sources of ignition are to be present during installation, to prevent fire or explosion that can cause 

serious injury or death.  Grinding, cutting, and drilling must be performed with care to prevent ignition.  Draining and 

removal of all fuel and ventilation of vapors in vehicle and fuel system is recommended when performing such 

procedures.  Proper eye and personal protection is required at all times during installation. 

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The Vehicle’s fuel system may be under pressure!  Do not loosen any fuel connections until relieving all fuel system 

pressure.  Consult an applicable service manual for instructions to relieve fuel system pressure safely. 

This product is intended for racing, off-road, or marine use only.  This fuel system component may not be legal for 

sale or use on emission controlled motor vehicles; consult local, state and national laws.  

Product Contents:

 

 

Check the diagram and list of components (right) 
to ensure that no components are missing from 
box.  Contact your Fuelab distributor immediately 
for replacement. 

93901 Features and Performance Ratings: 

Inlet Port Size 

-8AN Military Port

Outlet Port Size 

-8AN Military Port

Fuel Cell Ports 

3x -8AN Military Ports 

Rated Flow Rate 

66 GPH @ 45 PSI,13.5V 

(250 LPH @ 3 Bar) 

Maximum Pressure 

125 PSI (8.5 Bar) 

Operating Voltage

8-18 Volts

Maximum Current Draw 

15 Amperes 

WARNING! 

 

 

 

 

Power Supply Voltage must be constant as specified in above specification.  Only install fuel 

pump on vehicles using 12 Volt (6 cell lead acid battery) with or without a normal operating alternator 
charging system.  Pulse-Width Modulation or other means of reducing input power voltage may result 
in erratic or non-operational condition.   

Before Installation, Plan Entire Fuel System: 

A complete design plan of entire fuel system must be created for the specific application.  These instructions are a 
guide to help design this plan with respects to integrating this model of fuel pump only.  Consult other sources of 
information and manufacturer’s instructions for the various components of the fuel system.  These instructions are 
limited to general topics of fuel pump kit installation and may not include specific information pertaining to your 
specific application.  These instructions are written assuming the use of Multi-Point Electronic Fuel Injection using a 
standard return (bypass) style fuel pressure regulator.  This fuel pump kit may be integrated in some general 
carbureted systems using a bypass system.  Visit our company website (www.fuelab.com) for specific details 
pertaining to example fuel systems and other solution ideas.  Additional information including advanced 
troubleshooting, any special alerts and FAQ’s pertaining to this and other products is also available.  A good design 
plan for the fuel system must contain consideration for: pressure and flow rate through various components, quality 
of components, operating environment (temperature, vibration, shock, general exposure to elements) and local area 
laws.  Begin installation of fuel pump only after a complete plan is established to help avoid fuel system component 
failure, costly rework, and excessive installation time.   

Summary of Contents for 93901

Page 1: ...our Fuelab distributor immediately for replacement 93901 Features and Performance Ratings Inlet Port Size 8AN Military Port Outlet Port Size 8AN Military Port Fuel Cell Ports 3x 8AN Military Ports Rated Flow Rate 66 GPH 45 PSI 13 5V 250 LPH 3 Bar Maximum Pressure 125 PSI 8 5 Bar Operating Voltage 8 18 Volts Maximum Current Draw 15 Amperes WARNING Power Supply Voltage must be constant as specified ...

Page 2: ... may serve as return fill or vent ports according to fabricator installer discretion Use 8AN plugs on all unused auxiliary ports 8AN fuel compatible o rings are supplied with the fuel pump that are to be used with all five 5 8AN fuel ports Use of a liquid filled gauge exposed to engine compartment heat is not recommended as the liquid inside the gauge may exert measurement errors DO NOT plumb to a...

Page 3: ... maximum speed or flow setting Electronic devices such as Engine Management Units may have an output that can produce PWM Signals compatible with this Controller Attach this white signal wire to ground to operate system in Full Speed Mode not using speed control MAIN WIRING SCHEMATIC DIAGRAM Some electrical components shown are not supplied with kit Installation Steps 1 Disconnect the ground termi...

Page 4: ...on this sheet and the next regarding tank requirements These include Flat top with an accessible area at 4 70 diameter This area MUST HAVE a good surface finish to seal the flange against the tank using the supplied gasket This flat area can be at an angle or even side of tank if required DO NOT INSTALL ON THE BOTTOM OF THE TANK Minimum Depth reference figures is 8 3 4 Maximum Depth reference figu...

Page 5: ...ting in Step 3f herein Write down this new value here for convenience ________________ INCHES 3f Using the calculated value from Step 3e second value obtained after subtraction measure and mark the Pick Up Tube Assembly as shown above right Use a Pipe Cutting Tool to cut the tube at the marked position to achieve the correct installation length for the Pick Up Tube Assembly as measured in Step 3e ...

Page 6: ... repeat priming procedure to ensure that fuel pump is receiving fuel from tank Turn on fuel pump typically by bypassing fuel pump relay without engine operating ECU or engine management computer may be controlling the relay The ECU may only operate pump for a few seconds each time ignition switch is set to on The pump will have to operate several seconds 30 to prime and drive air out of the fuel s...

Page 7: ...improperly sized wire Debris from tank or plumbing lodged inside pump Check voltage to controller at power terminals If voltage is steady and consistent within 1 2 Volt of battery then contact Fuelab for assistance or repair If voltage is inconsistent as described repair or replace electrical components as required Not building up fuel pressure Incorrect fuel system initial priming procedure Pump ...

Page 8: ...ive obligation of Manufacturer shall at its option be to repair or replace the defective Products in the manner and for the period provided above or to refund the purchase price Manufacturer shall not have any other obligation with respect to the Products or any part thereof whether based on contract tort strict liability or otherwise 4 Other Statements ORAL OR OTHER WRITTEN STATEMENTS BY MANUFACT...

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