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340lph Fuel Pump & Hanger Fits 86-98.5 Ford Mustang, part number FM7765
CLASSIC PARTS GARAGE · SCHEMATIC
FM7765
FM7765AeromotiveFront

340lph Fuel Pump & Hanger Fits 86-98.5 Ford Mustang

High-flow 340LPH in-tank fuel pump and hanger assembly for compatible 1986–1998.5 Ford Mustang applications. Designed to increase fuel-delivery capacity for EFI, modified engines, forced induction, and performance builds while providing a convenient tank-mounted hanger solution.

In stock12 Months

Not concours correct

This setup is correct for compatible 1986–1998.5 Mustang performance applications because it combines a high-flow 340LPH in-tank pump with a Mustang-style hanger assembly, helping maintain the intended tank-mounted pump location.

$300.00
1
003Specification

What it is

SHEET
003
SUBJECT
FM7765
SCALE
1:1
REV
A

340LPH Fuel Pump & Hanger for 1986–1998.5 Ford Mustang Product Description Shop 340LPH fuel pump and hanger for 1986–1998.5 Ford Mustang applications when upgrading the factory fuel system for improved flow and performance. Replacing a used Mustang fuel pump can help correct weak fuel pressure, poor delivery, hard starting, and fuel starvation under load. Order Ford Mustang 340LPH fuel pump and hanger assembly for EFI restoration, modified street cars, and performance builds. Designed for compatible 1986–1998.5 Ford Mustang fuel tanks, this high-flow in-tank setup combines a 340 liters-per-hour fuel pump with a hanger-style mounting assembly. It provides a convenient foundation for naturally aspirated, supercharged, turbocharged, or EFI-upgraded combinations where the original pump may not supply enough fuel. Key Features Rated fuel pump flow of approximately 340 LPH Fits compatible 1986–1998.5 Ford Mustang applications In-tank fuel pump and hanger configuration Suitable for EFI and performance fuel-system upgrades Helps support increased fuel demand from modified engines Convenient replacement for aging or low-output factory pumps Useful for naturally aspirated and forced-induction builds Hanger assembly simplifies installation compared with adapting a universal pump Suitable for restoration, street-performance, and custom builds Product Specifications Specification Details Product Type Fuel Pump & Hanger Assembly Vehicle Ford Mustang Model Years 1986–1998.5 Pump Location In-Tank Fuel Pump Flow 340 LPH Fuel System EFI / High-Flow Fuel Delivery Hanger Included Yes Pump Included Yes Fuel Compatibility Verify Feed / Return Connections Verify Electrical Connector Verify Fuel Level Sender Verify Inclusion / Compatibility Regulator Not Included Unless Stated Installation Hardware Verify Why Upgrade the Fuel Pump? Higher-horsepower engines require greater fuel volume, especially under boost or sustained load. A 340LPH pump can provide more delivery capacity than many original Mustang fuel pumps while the matching hanger helps maintain a clean in-tank installation. This makes the assembly useful when replacing a failing pump or preparing the vehicle for larger injectors, upgraded fuel rails, forced induction, engine modifications, or other increased fuel-demand applications.

Features
  • Rated fuel-pump flow of approximately 340 LPH
  • Fits compatible 1986–1998.5 Ford Mustang applications
  • In-tank pump and hanger configuration
  • Suitable for EFI fuel systems
  • Supports higher fuel demand than many original pumps
  • Useful for naturally aspirated and forced-induction builds
  • Suitable for turbocharged and supercharged Mustangs
  • Helps address weak fuel delivery from aging factory pumps
  • Convenient hanger-style installation
  • Suitable for restoration, street-performance, and custom builds
  • Can support larger injectors and upgraded fuel systems when properly matched
  • Submerged pump design helps with pump cooling and noise reduction
In the box
  • 1 × 340LPH in-tank fuel pump
  • Fuel pump hanger assembly
  • Pump mounting hardware
  • Fuel strainer / pickup sock where supplied
  • Electrical terminals or pigtail where supplied
  • Feed and return provisions
  • Seals / O-rings where supplied
  • Installation hardware
  • Installation instructions where supplied

Shipping weight 10.00 lb

004Application register

Everything this fits

1 application · 0 verified

SHEET
004
SUBJECT
FITMENT
SCALE
1:1
REV
A
Ford1
  • 1979–1993Mustang
    All engines

Intended for compatible 1986–1998.5 Ford Mustang applications. Verify the exact production year and fuel-tank configuration before ordering. The 1998.5 cutoff is important; later vehicles may use a different fuel-system arrangement. Confirm hanger flange dimensions and mounting pattern. Verify feed and return port configuration. Confirm fuel-level sender compatibility and whether a sender is included. Check electrical connector style and terminal configuration. Verify pump voltage and current requirements. High-flow pumps may require upgraded wiring, relay, fuse, and grounding. Confirm fuel-pressure requirements for the engine and injectors. Verify regulator compatibility. Make sure the pump flow is appropriate for the vehicle’s horsepower and fuel type. Confirm gasoline, ethanol-blend, or other fuel compatibility before use. Inspect the fuel tank for rust, debris, or contamination before installation. Replace or inspect the fuel filter when installing a new pump. Check tank venting and EVAP configuration where applicable. Modified tanks or aftermarket fuel cells may require additional adaptation. Professional installation is recommended if fuel-system modifications are required.

005Counter questions

Asked about this part

What is this product?
It is a 340LPH in-tank fuel pump and hanger assembly for compatible 1986–1998.5 Ford Mustang applications.
What does 340LPH mean?
It means the pump is rated to flow approximately 340 liters of fuel per hour under its specified test conditions.
What years does it fit?
It is intended for compatible 1986 through 1998.5 Ford Mustang applications.
Why does the listing say 1998.5 instead of simply 1998?
Some Mustang fuel-system configurations changed during the production period, so the mid-year cutoff is important and should be verified before ordering.
Does it come with a hanger?
Yes, the product is described as a fuel pump and hanger assembly.
Is the fuel-level sender included?
It may be. Verify the exact package contents.
Does it include a fuel strainer?
It may include a pickup sock or strainer where supplied.
Does it include wiring?
It may include electrical terminals or a pigtail, but verify the exact kit.
Does it include a fuel pressure regulator?
No, not unless specifically stated.
Can fuel starvation damage an engine?
Yes, especially under high load or boost.
Can this pump help prevent fuel starvation?
It can increase available fuel flow, but the complete system must still be correctly designed.
Does the hanger matter as much as the pump?
Yes. The hanger affects mounting, pickup position, electrical connection, feed and return routing, and sender compatibility.
Why should the tank be cleaned?
Rust, dirt, and old fuel deposits can damage the new pump or block the strainer.
Should the fuel filter be replaced when installing the pump?
It is strongly recommended.
Does the pump use fuel for cooling?
In-tank pumps are cooled in part by being submerged in fuel.
Is it bad to repeatedly run the tank nearly empty?
It can increase pump heat and reduce cooling.
Can poor electrical connections make the pump noisy?
They can contribute to poor operation.
Should voltage be measured at the pump while it is running?
Yes when diagnosing fuel-delivery problems.
Can battery voltage and pump voltage differ?
Yes because of wiring resistance and voltage drop.
Should electrical connectors be fuel-safe?
Yes where components are exposed to fuel or tank vapors.
Can ordinary wire be used inside the fuel tank?
No. In-tank wiring must be rated for fuel exposure.
Can this pump be used with E85?
Only if the exact pump, seals, hoses, and hanger components are specifically compatible with ethanol-rich fuel.
Can it be used with regular gasoline?
Usually yes, subject to the product’s fuel-compatibility specifications.
Can it be used with race fuel?
Only if the pump and seals are rated for that specific fuel.
Can this pump be used in a return-style system?
Yes, if the hanger and regulator setup are compatible.
Can it be used in a returnless system?
Possibly, but the exact model-year fuel-system strategy must be verified.
What is the estimated product weight?
Approximately 4–8 lb depending on the hanger, sender, fittings, and included hardware.
What shipping weight should I use?
Approximately 10 lb is a practical estimated packaged weight.
Why can shipping weight vary?
Pump construction, hanger material, sender components, seals, hardware, wiring, and packaging affect the final weight.
What should I inspect first?
Check the pump, hanger, flange, tubes, electrical connector, sender, float arm, strainer, seals, and mounting hardware.
Should the pump be tested before reinstalling the tank?
Follow the manufacturer’s recommended procedure while avoiding prolonged dry operation.
What should I verify before ordering?
Confirm the exact 1986–1998.5 Ford Mustang production date, fuel-tank and hanger design, return or returnless fuel-system configuration, feed and return connections, fuel-level sender compatibility, electrical connector, pump voltage and current requirements, regulator setup, fuel type, engine horsepower demand, and exact package contents before purchase.
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