High Output Alternator for Ford Excursion F-250 F-350 F-450 F-550 (2002-2003) 7.3L

High-Output 250-Amp Alternator for 2002-2003 Ford Excursion, F-250, F-350, F-450, F-550 (PN96 / U137)

What it Does: The 250-Amp High Output Alternator replaces the low-output factory unit on 2002-2003 Ford Super Duty and Excursion trucks to deliver stable charging voltage and prevent critical electrical system collapse under heavy auxiliary loads.

The Stock Ford Excursion, F-250, F-350, F-450, F-550 Charging Limitation

The original factory 110-amp alternator struggles under the electrical demands of the 7.3L Power Stroke. Between heavy glow plug draw cycles, aftermarket winches, plows, and high-idle demands, the factory diodes quickly encounter severe heat soak. This thermal saturation leads to excessive voltage drops below 13.2V, which starves the high-voltage Injector Drive Module (IDM) and causes sluggish HEUI injector operation, hard starts, and premature battery degradation.

The Engineering Solution

Engineered for commercial-grade durability, this 250-amp direct replacement is manufactured in the USA using heavy-gauge copper windings and high-efficiency 12-diode heavy-duty rectifiers. The internal housing increases cooling airflow around the stator to counteract thermal fade during extended idling. By sustaining 14.4 volts under peak continuous electrical load, this unit protects delicate engine control electronics and ensures dependable starting power.

What's Included

• 1 High Output 250-Amp Alternator

Technical Specifications

Compatibility

• 2002-2003 Ford Excursion 7.3L
• 2002-2003 Ford F-250 7.3L
• 2002-2003 Ford F-350 7.3L
• 2002-2003 Ford F-450 7.3L
• 2002-2003 Ford F-550 7.3L

Frequently Asked Questions & Fitment Warnings

Does this fit the PN96 / U137 Excursion, F-250, F-350, F-450, F-550?

Yes, this is a direct fit for the 2002-2003 Ford Excursion, F-250, F-350, F-450, F-550 equipped with the 7.3L Power Stroke engine.

Should I upgrade my battery charge wire when installing this 250A unit?

Yes, running an upgraded 4-gauge or 1/0-gauge fused charge lead directly to the positive battery terminal is strongly recommended to safely handle the 250-amp peak current output without bottlenecking.

The Ford Heavy-Duty Standard

Engineered to handle grueling commercial fleet use and extreme towing cycles, this alternator delivers uninterrupted charging stability whether hauling heavy goosenecks across highway grades or running high-draw recovery gear on remote job sites.