18643A5 Premium Engine Drive Coupler Assembly for MerCruiser Alpha One, Gen II & Bravo Sterndrives | Fits 3.0L 4.3L 4.5L 5.0L 5.7L Engines | 14-Inch Flywheel, 3-Inch Bolt Pattern | Replaces 18-2323 — Open-Box, 6% Off

Name: 18643A5 Premium Engine Drive Coupler Assembly for MerCruiser Alpha One, Gen II & Bravo Sterndrives | Fits 3.0L 4.3L 4.5L 5.0L 5.7L Engines | 14-Inch Flywheel, 3-Inch Bolt Pattern | Replaces 18-2323
Brand: FASWORX
SKU: awhd-us-b0gxd296qy
Price: 155.13 USD
Availability: InStock

Brand: FASWORX

Condition: Used

$155¹³

$164⁹⁵

-6% Save $9⁸²

Updated: Yesterday

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Description

DIRECT REPLACEMENT: Exact fit aftermarket replacement for OEM part numbers 18643A5, 18643A7, and 710-18643A5. Also seamlessly cross-references with Sierra 18-2323, GLM 11532, and EMP 93-93203.

MARINE-GRADE DURABILITY: This premium part is built to last through high-torque applications and harsh marine environments, offering superior vibration dampening and rotational strength to outlast standard alternatives.

PRECISE TECHNICAL SPECS: Designed specifically for 14-inch flywheels with a 3-inch crankshaft bolt pattern. Features a triangular shape, flywheel mount design for engines utilizing a 1-piece rear main seal.

DRIVE COMPATIBILITY: Engineered to securely fit MerCruiser Alpha One, Alpha Gen II, and Bravo (LX) sterndrives connected to 3.0L (4-Cyl), 4.3L (V-6), 4.5L MPI, 5.0L, and 5.7L (V-8) engine blocks.

FITMENT VERIFICATION: Input yoke is NOT included. To ensure a correct installation, you must verify your exact engine block size and serial number against our fitment chart before purchasing.

FASWORX Premium Engine Drive Coupler Assembly (18643A5) Keep your powertrain running at peak performance with the FASWORX Premium Engine Drive Coupler. Manufactured to exacting technical standards, this heavy-duty coupler is built to last, providing exceptional rotational strength and vibration dampening for your MerCruiser Alpha or Bravo sterndrive. Whether you are doing routine maintenance or a complete overhaul, this premium aftermarket upgrade ensures a reliable connection between your engine and drive. Technical Specifications: Flywheel Size: 14-Inch Bolt Pattern: 3-Inch Crankshaft Bolt Pattern Mount Type: Triangular Shape Seal Compatibility: 1-Piece Rear Main Seal Note: Does not include input yoke or mounting hardware.

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Product Details

SKU:: awhd-us-b0gxd296qy
Model:: 18643A5
Country:: US
ASIN:: B0GXD296QY

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Common questions about buying open-box and refurbished.

Why buy refurbished or open-box?

Refurbished and open-box products offer the same performance as new at a fraction of the price. You're already saving $10 on this listing. They've been inspected, tested, and are ready to use — the only difference is the price tag. Buying refurbished also reduces electronic waste, extending product life cycles and keeping functional devices out of landfills.

What's the difference between open-box and refurbished?

Open-box products are customer returns that have been inspected and confirmed functional. They may show little to no use — often the item was returned simply because the buyer changed their mind. Refurbished products have been professionally repaired or restored by technicians, tested to meet or exceed manufacturer specifications, and sometimes come with a warranty. Both are a smart alternative to buying new.

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Is it safe to buy refurbished?

Yes. Products listed on OpenBoxFox come from established retailers like Amazon, Reebelo, and Dyson — not unknown third-party sellers. Each retailer has buyer protection policies, return windows, and in some cases warranties. You get the price advantage of used goods with the purchase security of a known retailer.