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Sierra 18-6455 Alternator 50 Amp 5S/I for Mercury Mariner Outboard

Manufacturer

Picture for manufacturer Sierra

Part Number

18-6455
14 reviews
Sale Price

$414.46

In Stock (10)

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-6455 is a 50-amp alternator designed specifically for Mercury and Mariner outboard motors. This reliable replacement alternator features 5-stator/inducer (5S/I) construction, delivering consistent charging performance for marine electrical systems.

Key Features:

  • 50-amp output capacity for dependable battery charging
  • 5S/I (5-stator/inducer) design for efficient power generation
  • Direct replacement for Mercury/Mariner OEM alternators
  • Marine-grade construction for corrosion resistance
  • Precision-engineered to OEM specifications

Sierra Marine is known for producing high-quality aftermarket parts that meet or exceed original equipment standards. This alternator provides reliable performance for keeping your outboard's battery system charged during operation, ensuring you have power for electronics, starting, and accessories.

Products specifications

Compatibility

5S/I 50 Amp for Mercury/Mariner Outboard Motors. Fits 1.5L and 3.0L. For 200 DFI200 DFI/DTS225 EFI225 EFI Sea Pro225 DFI/DTS250 EFI. Replaces Mercury 875286T875286A1881247A18M0064020

Type

Alternators

Fast shipping on purchased item. Had in stock when other's did not.

wish you had this size in black

The order was very easy to place

so far so good

make it work right and I'll be back!

Good so far

It was ok

Easy

Quick and easy. Good prices, too

This was my first time using autoplicity and I was very happy with their service. Great prices and fast shipping.

Great product at a a great price!

Good prices free shipping

Unbeliveable customer service and super fast shipping. I had a question about my order and I was able to use the online chat function to instantly connect with a customer service agent that was quick to answer all my questions regarding my order. I am very pleased with the level of service I received not to mention the great price they offered on the item I purchased. I will be sure to continue doing business with Autoplicity for my automotive needs. Thanks so much. A+

so far - so good

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