POWERMASTER ALTERNATOR 21SS15S

( Brand: Powermaster Alternator ), ( Manufacturer Part Number: 21SS15S ), ( Part Details: Alternator Ford Upgrade; 150 Amp; 100 Idle; 6 Groove Pulley. ), ( Fit Years: 1991 1988 1992 1990 1989 1985 1981 1975 1976 1977 1978 1979 ), ( Cs-sku: 400 )

Review POWERMASTER ALTERNATOR Ford fits F150 1975–1992

Introducing the Powermaster 21SS15S Alternator, an excellent replacement solution for Ford F-150 pickup trucks manufactured between 1975 and 1992. This alternator is engineered to deliver reliable and consistent power for your vehicle's electrical systems.

The Powermaster 21SS15S Alternator boasts a robust 155 amp output, ensuring that your battery stays charged effectively even under heavy electrical loads. This high output helps prevent the hassle of frequent jump starts or battery replacements.

Designed specifically for Ford F-150 models from 1975 to 1992, this alternator is a direct fit, meaning no modifications are required for installation. It comes with a durable, reinforced drive belt and a heavy-duty 6-bolt pulley system that ensures a secure and efficient connection to the engine.

The Powermaster 21SS15S Alternator is built with a strong rotor and stator design, which allows it to handle the demanding conditions often encountered in trucks. Its internal diode design provides reverse voltage protection, ensuring the longevity of your vehicle's electrical components.

This alternator is also engineered for durability, featuring a robust cast aluminum housing that provides excellent heat dissipation and protection against corrosion. Its vibration-resistant mounting system ensures a stable installation, reducing the risk of damaging other components.

Installation of the Powermaster 21SS15S Alternator is straightforward, with a clear and easy-to-follow installation guide included. This alternator comes with a comprehensive 3-year warranty, giving you peace of mind and confidence in your purchase.

In summary, the Powermaster 21SS15S Alternator is a high-performing, direct-fit replacement solution for Ford F-150 trucks from 1975 to 1992. Its robust design, high output, and durable construction make it an excellent choice for providing reliable and consistent power to your vehicle's electrical systems.

The PowerMaster 21SS15S alternator is a popular choice for Ford F-150 models from 1975 to 1992 due to its durability and reliability. Here are some pros and cons that can help you make an informed decision before making a purchase.

1. Designed specifically for Ford F-150 models: This alternator is engineered to fit and perform optimally on Ford F-150 trucks from 1975 to 1992.

2. High output: With a 150-amp rating, this alternator can effectively charge the battery and power the electrical systems of your Ford F-150.

3. Durable construction: The PowerMaster 21SS15S alternator features a robust design with a heavy-duty housing, sealed bearings, and a double-sealed voltage regulator.

4. Brushless design: This alternator uses a brushless design, which eliminates the need for regular maintenance and reduces the likelihood of electrical failure.

5. OEM-style connector: This alternator comes with an OEM-style connector, making the installation process straightforward and hassle-free.

1. Price: The PowerMaster 21SS15S alternator may be more expensive than some other aftermarket alternatives.

2. Heavy: Compared to some other alternators, the PowerMaster 21SS15S is relatively heavy, which could make it more difficult to install for some individuals without proper lifting equipment.

3. May require additional wiring: Depending on the specific wiring configuration of your Ford F-150, you may need to purchase and install additional wiring harnesses to connect the alternator to the battery and electrical systems.

The PowerMaster 21SS15S alternator offers several advantages, including a high output rating, durable construction, and a brushless design, making it an excellent choice for Ford F-150 owners from 1975 to 1992. However, it may be more expensive than some other options, and some installation may require additional wiring. Ultimately, the decision to purchase this alternator depends on your specific needs, budget, and technical skills.

If you value reliability, durability, and high output, and you're willing to pay a premium for these features, the PowerMaster 21SS15S alternator is an excellent choice for your Ford F-150. It's designed specifically for your vehicle, and its brushless design eliminates the need for regular maintenance. However, if you're on a tight budget or uncomfortable with the installation process, you may want to consider alternative options with lower price points and simpler installation procedures.

Details:

Individually Dino Tested with Proof of Performance Guarantee. 1984 - 1992 Ford F150 5.8L V8. 1984 Ford F150 6.9L V8. Easy To Install 1-Wire Internally Regulated.

1977- 1985 Ford F150 5.8L V8 Windsor. Ultimate Custom Look With Tear Drop Design.

part #: 21ss15s price

• $245.99

specifications altnagen:

• for models: F150
• for makes: Ford
• for years: 1975-1992
• brand: Powermaster Alternator
• mpn: 21ss15s
• part details: Alternator Ford Upgrade; 150 Amp; 100 Idle; 6 Groove Pulley.
• fit years: 1991 1988 1992 1990 1989 1985 1981 1975 1976 1977 1978 1979
• cs-sku: 400

seller altnagen:

• rating: 95.7%
• # reviews: 59505
• city: Berkley, Massachusetts

returns altnagen:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

payments altnagen:

• other
• credit card: Diners-club
• wallet: Apple-pay

general altnagen:

• condition: New
• Car Truck Parts Accessories > Starters, Alternators, ECUs Wiring > Alternators Generators

shipping altnagen:

• service: FedEx Ground or FedEx Home Delivery
• cost: $0.00
• transit: 3-8 Days
• carrier: FedEx
• type: Fixed
• class: Standard

offer altnagen:

• started: May 5, 2025
• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0

Powermaster Alternator 21SS15S Is Similar To:

• 110 Powermaster Alternator Pulley Chrome 692209000136 (51.9% similar) Brand new pulley off of Alternator requiring a serpentine instead...(March 17th, 2018)
• 17078 Powermaster Street Alternator (48.9% similar) 1g ford Alternator 75 1 v pulley chrome...(April 3rd, 2018)
• 170781 Powermaster Alternator 692209001829 (53.6% similar) ...(January 15th, 2019)
• 17294-114 Powermaster Street Alternator Amps Chrome Plated Gm Case 692209004530 (43.3% similar) Advertised amperage output 100 amps Alternator brackets included no case gm 12SI finish chrome plated belt notes 6-GROOVE pulley. One-wire capable yes pulley included serpentine quantity sold individually. Fitment information may not be available for all products and those without will have a ...(April 22nd, 2018)
• 17509 Powermaster Performance Alternator 692209001638 (48.1% similar) Powermaster Alternator early Chrysler 75 double pulley field square back chrome features:excellent idle output heavy duty rectifier external regulator not included except one fireproof of performance tag manufacturer starters and Alternators for racing show cars...(December 23rd, 2017)
• 175091 Powermaster Double Groove Pulley Alternator 692209001645 (44.1% similar) Shipping fast is important...(October 29th, 2018)
• 175191 Powermaster Performance Alternator 692209001669 (47.7% similar) Outdoor gear bikes, camping gear, etc. Powermaster Alternator fits Chrysler square back 95 1v pulley 1 wire only chrome specifications:amperage: amp mounting: oem features:externally regulated heavy duty rectifier early oem retro look proof of performance tag Powermaster has a variety Alternators ...(April 30th, 2018)
• 178611 Powermaster Street Alternator Amps Chrome Plated Gm Case 692209001867 (44.3% similar) Fitment information may not be available for all products and those without will have a compatibility link. Buyer pays return shipping. Advertised amperage output 105 amps Alternator brackets included no case gm CS130 finish chrome plated belt one-wire capable yes pulley v-belt quantity sold ...(August 15th, 2018)
• 17864 Powermaster Street Alternator Amps Chrome Plated Gm Case Style (45.5% similar) Please feel free to call us at. Advertised amperage OUTPUT140 amps alternator brackets case style gm CS144ALTERNATOR finish chrome plated belt -wire individually...(November 1st, 2018)
• 2505047 Powermaster Xs Volt Drag Race Alternator Kit 692209007654 (48.3% similar) One-wire capable yes pulley included v-belt quantity sold as a kit. Advertised amperage output 55 amps Alternator brackets included yes case poundings finish black powder coated belt notes snug mount bracket application for full body size vehicles. Buyer pays return shipping. Regulator included yes ...(May 1st, 2018)
• 27294 Powermaster Performance Alternator 692209001980 (48.1% similar) Powermaster Alternator 12SI idle 1v OE look polished specifications:amperage: 100 amp mounting: oem features:ultimate custom billet at affordable prices smooth die cast housing w teardrop design smooth back special vents gold battery post proof of performance has a variety Alternators available for...(April 16th, 2018)