High Output Alternator for Ford F-250 (1997-1999) 4.6L 5.4L
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High-Amperage 250-Amp Alternator for 1997-1999 Ford F-250 (PN96)
What it Does: The 250-Amp High Output Alternator upgrades the factory charging system on the 1997-1999 Ford F-250 to deliver sustained high-amperage current for demanding auxiliary electronics, winches, and commercial work equipment.
The Stock Ford F-250 Electrical Bottleneck
Factory charging systems on the tenth-generation PN96 platform utilize standard 95-amp to 130-amp units that quickly become overwhelmed by modern electrical demands. When auxiliary lighting, high-draw inverters, or plows are introduced, the OEM stator windings suffer severe heat soak. This leads to continuous voltage sag under low-RPM idle, thermal diode degradation, and battery starvation that strains both the ignition system and starter circuit.
The Engineering Solution
Manufactured in the USA, this high-output 250A unit addresses core thermal and inductive limitations. Featuring heavy-duty copper stator windings, high-capacity avalanche diode rectifiers, and a dynamically balanced rotor assembly, it maintains clean 14.4-volt output across the entire rev range. The OEM-spec direct-mount casing bolts seamlessly into factory brackets while integrating dual internal cooling fans to dissipate thermal loads under heavy continuous operation, directly replacing OEM part F65U-10300-EA and interchange GL497.
What's Included
- 1 x 250-Amp High Output Alternator
Technical Specifications
| Fitment | 1997-1999 Ford F-250 |
|---|---|
| Engine / Chassis | 4.6L, 5.4L Modular V8 / PN96 |
| Stock Output | 220-260 hp / 265-350 lb-ft |
| Replaces OEM Part # | GL497, F7UU-AB, F65U-EA, F65U-10300-EA, F6PZ-10346-RA, F7UU-10300-AB, 334-2273, 7790, AL7546N, AL7546X, GL372, 7790N, 7790R, 7790-250A |
Compatibility
- 1997 Ford F-250 4.6L V8
- 1997 Ford F-250 5.4L V8
- 1998 Ford F-250 4.6L V8
- 1998 Ford F-250 5.4L V8
- 1999 Ford F-250 4.6L V8
- 1999 Ford F-250 5.4L V8
Frequently Asked Questions & Fitment Warnings
Does this fit the PN96 F-250?
Yes, this is a direct fit for the 1997-1999 Ford F-250 equipped with the Modular V8 (4.6L and 5.4L) engines. Does not fit 7.3L Power Stroke Diesel models.
Do I need to upgrade my vehicle wiring?
A 0-gauge or 4-gauge "Big 3" wiring upgrade from the alternator positive stud to the battery is strongly recommended to handle the maximum 250-amp continuous current safely.
The Ford Heavy-Duty Standard
Engineered for severe-duty utility and demanding towing applications, this charging unit restores dependable electrical baseline performance so your truck handles high-current payloads without power failure.
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