1. Sterndrive Electrical For Sale.
  2. sku: 3040617682603713
  3. PROTORQUE PH300-0021

PROTORQUE PH300-0021 Alternator 865369006854

fits model: 200, 250, Mariner. make: Mercury. year: 1998–2008.

Ph300-0021 Protorque Alternator For Mercury / Mariner 200 - 250 Hp 98-08

( Brand: Protorque ), ( Manufacturer Part Number: PH300-0021 ), ( Part Type: Hp Alternator ), ( UPC: 865369006854 )

Review PROTORQUE Alternator Mercury Hp fits MARINER 200 250 1998–2008

The Protorque PH300-0021 is a high-performance alternator specifically designed for Mercury Mariner engines with a displacement of 200 to 250 horsepower, manufactured between 1998 and 2008. This alternator is an upgrade from the original equipment, offering several advantages to enhance the overall performance and reliability of your vehicle.

The Protorque PH300-0021 alternator boasts a robust design, featuring a heavy-duty housing made of aluminum, ensuring long-lasting durability. The brushing system is engineered with premium-grade bearings and copper commutators for efficient power transfer and extended service life. The alternator also includes a 3-phase rotor design, which provides better charging system performance and electrical efficiency.

This alternator delivers a powerful output of 140 amps at 3,000 RPM, ensuring your battery is always charged, even under heavy loads. It also includes an automatic voltage regulation (AVR) system, which maintains a consistent battery voltage, preventing damage to the battery and ensuring optimal system performance.

Additionally, the Protorque PH300-0021 alternator is designed with a compact size and bolt-on configuration, making it an easy and direct replacement for the OEM alternator. This eliminates the need for complex wiring harnesses or modifications, saving you time and effort during the installation process.

The Protorque PH300-0021 alternator is also backed by a comprehensive 3-year warranty, providing you with peace of mind and ensuring that your investment is protected. In summary, this high-performance alternator delivers increased power output, improved efficiency, and extended durability, making it the perfect upgrade for your Mercury Mariner engine.

The Protorque PH300-0021 is a high-performance alternator designed to provide additional power for accessories and charging systems in Mercury Mariner 200-250 HP engines manufactured between 1998 and 2008. Here are some pros and cons of purchasing this alternator:

Pros:

1. Increased Power: This alternator delivers more power to the electrical system, allowing for efficient charging of the battery and supporting heavy electrical loads such as air conditioning, stereo systems, and power windows.

2. Durability: Protorque alternators are known for their robust design and superior construction, making them a reliable choice for marine applications where durability is crucial.

3. Improved Performance: With increased power output, you can expect better performance from your engine and accessories, enhancing your overall boating experience.

4. OEM Replacement: The Protorque PH300-0021 is an OEM (Original Equipment Manufacturer) replacement for the stock alternator, ensuring a perfect fit and ease of installation.

Cons:

1. Cost: Compared to a stock alternator, the Protorque PH300-0021 is more expensive. However, the additional power and improved performance may justify the investment for some users.

2. Installation Complexity: Installing a high-performance alternator like the Protorque PH300-0021 may require some technical expertise. It is recommended to consult a professional mechanic or marine technician for installation to ensure proper functioning and prevent potential damage to other components.

3. Size: The Protorque alternator is slightly larger than the stock alternator, which may require some modifications to the engine compartment or wiring harness.

Conclusion:

If you own a Mercury Mariner 200-250 HP engine and require additional power for your electrical system or heavy-duty accessories, the Protorque PH300-0021 alternator is an excellent choice. Its durability, improved performance, and OEM replacement status make it a reliable and efficient solution for marine applications. However, the higher cost, potential installation complexity, and size difference should be considered before making a purchase.

Recommendation:

Before deciding to purchase the Protorque PH300-0021 alternator, consider your specific needs and requirements. If you frequently use heavy electrical loads, such as air conditioning or multiple accessories, this alternator may be a worthwhile investment. If you're unsure about the installation process, consult a professional mechanic or marine technician to ensure a smooth installation and optimal performance.

Details:

Protorque Alternator PH300-0021 for Mercury / Mariner 200 - 250 Hp 98-08, OE#'s: 828506 875286A1 875286T 881247A1 8M0064020.

part #: ph3000021 prices

  • $349.97-$350.22

specifications steelectr:

  • for models: 200, 250, Mariner
  • for makes: Mercury
  • for years: 1998-2008
  • brand: Protorque
  • mpn: Ph300-0021
  • part type: Hp Alternator
  • upc: 865369006854

offer steelectr:

  • availability: In Stock
  • options: Ship-to-home
  • started: September 20, 2025
  • quantity: 1
  • sold: 0

shipping steelectr:

  • transit: 4-10 Days
  • carrier: USPS
  • class: Expedited
  • service: USPS Priority Mail
  • type: Fixed
  • cost: $0.00

seller steelectr:

  • rating: 100.0%
  • city: Hauppauge, New York
  • # reviews: 82

payments steelectr:

  • credit card: Discover
  • wallet: Apple-pay
  • other

returns steelectr:

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

general steelectr:

  • condition: New
  • Boat Parts > Sterndrive Motors Components > Electrical Systems
for models: 200, 250, mariner, for makes: mercury, for years: 1998-2008, part type: hp alternator,
category: boat parts > sterndrive components > electrical systems, sku: 3040617682603713,
Protorque PH300-0021 Is Similar To:
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2 offers $349.97–$350.22 USD
  • New. Offer #1 priced at $350.22 + $0.00 shipping estimate = $350.22* total. FREE SHIPPING
  • New. Offer #2 priced at $349.97 + $0.00 shipping estimate = $349.97* total. 6 Cyl 3.6265 Bore 3L Optimax 200. OEM#: 828506, 875286A1, 875286T, 881247A1, 8M0064020.FREE SHIPPING

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