Skip to product information
12_653681ea-ce93-4f91-8b58-61c1ca8e5735 - Northline Parts

For Mercury Marine Racing Heavy Duty 1.25 Prop Shaft Hub Kit 8M0183487 840389K06

Alligator_819_x_200_px - Northline Parts

The Aftermarket Parts Specialists

$130.99
Sale price  $130.99 Regular price 

In Stock

Ships Nationwide in 2–4 business days.

Questions? We're here to help!

Talk with a parts expert today

Call us

I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks

Edward H. — Verified customer

For Mercury Marine Racing Heavy Duty 1.25 Prop Shaft Hub Kit 8M0183487 840389K06

Enhance your boat's performance and protect your drivetrain with this heavy-duty prop shaft hub kit. Specifically designed for high-horsepower marine racing applications, this aftermarket kit provides a robust and reliable connection for 1.25-inch shafts, ensuring efficient power transfer and smoother operation on the water.

Key Features & Benefits

  • Heavy-duty construction optimized for high-performance and racing environments
  • Precision-engineered for a secure fit on 1.25-inch propeller shafts
  • Durable materials designed to withstand extreme marine conditions and stress
  • Helps dampen vibrations and protects the lower unit gearcase from impact

Compatible Models

  • Mercury Marine Racing outboards and sterndrives
  • Models requiring a 1.25" prop shaft hub assembly

Product Specifications

  • Shaft Size: 1.25 inches
  • Kit Type: Heavy Duty Propeller Hub Kit
  • Condition: Brand New Aftermarket
  • Equivalent Part Numbers: 8M0183487, 840389K06

Frequently Asked Questions

Is this an OEM part?
No, this is a high-quality aftermarket replacement part designed to meet or exceed the performance of the original equipment.

How do I confirm compatibility?
Please verify that your engine uses a 1.25-inch shaft and check your owner's manual to ensure part numbers 8M0183487 or 840389K06 are recommended for your setup.


Important: This is an aftermarket replacement part sold by Northline Parts. It is not made by the original equipment manufacturer unless specifically stated. Brand names, model names, and part numbers are used only to identify compatibility. Please compare your original part, photos, and fitment details before ordering.

Need Any Help?

Work 1-on-1 With An Expert For:

  • The Right Part Selection
  • Our Best Pricing Tiers
  • Priority Customer Support
  • White Glove Installations
  • Flexible Payment Options

Service was professional and easy to work with. They kept me updated on my order and recommended a different part when the one I originally picked wasn’t going to work. Everything showed up as expected and the process was smooth overall.

- Customer, Chris D.

Complete This Form

You may also like

Keywords (Used as search references only) View IP policy.