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WSM 447-318 Mercury 30-300 HP Lower Unit Bearing Replacement

Manufacturer

WSM

<h3>About WSM Performance Parts</h3><p>WSM Performance Parts has built a strong reputation among powersports enthusiasts as a go-to source for <strong>quality replacement parts</strong> across a wide range of recreational vehicles. Based in Bohemia, New York, WSM specializes in parts for personal watercraft (PWC), marine vessels, all-terrain vehicles (ATV), utility task vehicles (UTV), and dirt bikes — making them a versatile, one-stop brand for anyone who loves getting out on the water or hitting the trails.</p><p>With a catalog spanning hundreds of part numbers, WSM is committed to delivering OEM-compatible components that meet or exceed original equipment standards. Whether you&apos;re rebuilding a jet pump on a Sea-Doo, refreshing an outboard motor, or restoring performance to an aging ATV, WSM offers the parts to get the job done right. Their mission is straightforward: provide the highest quality parts on the market at reasonable prices — a philosophy that has earned them a loyal following among weekend riders and professional mechanics alike.</p><h3>Why Powersports Enthusiasts Trust WSM</h3><p>WSM&apos;s strength lies in the depth and breadth of their product coverage. Their catalog includes everything from piston kits and gasket sets to fuel filters, shift cable bellows, jet pump repair kits, and engine rebuild components. Products are engineered to fit a wide array of popular brands including Yamaha, Sea-Doo, Kawasaki, Mercury, Suzuki, and many more, ensuring that finding the right part for your specific application is straightforward.</p><ul style="list-style:disc"><li><strong>Wide Vehicle Coverage:</strong> Parts for PWC, marine outboards, ATVs, UTVs, and dirt bikes all under one brand.</li><li><strong>OEM Compatibility:</strong> WSM parts are cross-referenced to original equipment numbers, simplifying the parts-matching process.</li><li><strong>Quality Assurance:</strong> Each product is designed to restore factory-level performance and reliability.</li><li><strong>Accessible Pricing:</strong> Performance-grade replacement parts without the premium markup of dealership pricing.</li></ul><h3>WSM Product Categories</h3><p>From jet pump rebuild kits for personal watercraft to engine components for off-road machines, WSM&apos;s catalog is designed to support serious maintenance and performance restoration. Riders who demand dependable parts — whether for a weekend trip on the lake or a full engine overhaul — will find WSM&apos;s lineup a reliable resource. Explore their <a href="/5555-wsm-automatic-transmission-master-repair-kit-7772">Automatic Transmission Master Repair Kits</a> and other drivetrain solutions available in their catalog.</p>

Part Number

447-318
09/12/2036 12:05 AM
Sale Price

$14.62

1 left at this price

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The WSM 447-318 is an aftermarket replacement lower unit bearing designed for Mercury outboard motors ranging from 30 to 300 HP. WSM (Water Sports Manufacturing) is a well-established manufacturer of high-quality powersports and marine replacement parts, engineered to meet or exceed original equipment manufacturer (OEM) specifications.

The lower unit bearing plays a critical role in the gearcase assembly, supporting the driveshaft and gear rotation while reducing friction and wear under the demanding load conditions found in marine environments. Replacing a worn or damaged lower unit bearing restores proper driveshaft alignment and smooth gear engagement, helping protect the entire lower unit assembly from premature failure.

Key Features:

  • Aftermarket replacement lower unit bearing for Mercury outboard motors
  • Engineered to meet or exceed OEM fit, form, and function
  • Designed for Mercury 30–300 HP outboard applications
  • Manufactured by WSM, a trusted name in marine and powersports replacement parts
  • Direct-fit replacement for simplified installation

This bearing is an ideal choice for technicians and DIY mechanics performing lower unit rebuilds or gearcase service on compatible Mercury outboard motors. Always verify compatibility with your specific engine model and serial number before installation.

AUTOPLICITY IS EASY TO ORDER FROM.FAST SERVICE A GREAT COMPANY TO ORDER FROM AND DEAL WITH.

good price!

Arrived quicker than expected, and the parts were indeed the ones I ordered. These guys did great!

Not enough product's information to identify the correct item to purchase.

Fast and easy

Awesome and quick

This place is excellent. Very easy to use. My parts were shipped on time, and they kept me updated with multiple emails throughout the process. Would definitely buy from these guys again. A++

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