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Engine Coupler - Sierra Marine Engine Parts - 18-21754 (118-21754)

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6.91 LBS
Manufacturer Part Number (MPN):

Engine Coupler - Sierra Marine Engine Parts - 18-21754 (118-21754)


The Sea Star Solutions ENGINE COUPLER is a reliable, high-quality engine coupler designed for use in OMC 7.5L/460 King Cobra (1987-1990) sterndrives. On inboard/outboard engines, the engine coupler connects the engine to the stern drive. It takes the form of a steel plate or even a short shaft with holes drilled through one end for bolting to the flywheel of the boat's engine. It has six additional holes on the opposite end, or side, for bolting it to the stern drive. Even if it appears to be a round, square, or triangular plate, it is still a drive shaft that connects the boat's power source to the propulsion system.

Key features:

  • Top-quality engine coupler
  • 100% brand new and made with the highest quality materials in the industry
  • Links the power source of the boat to the propulsion system
  • Compatible with 7.5L / 460 King Cobra 1987-90
  • Has the ability to withstand high temperatures
  • Built to perform
  • Compact. Easy to store, carry and use.
  • Provides maximum convenience and comfort
  • It has been proven and tested for reliability to ensure it fulfils our quality standards.
  • Approved marine-grade product


  • Brand: Sea Star Solutions
  • Condition: Brand New
  • SKU: 18-21754
  • Weight: 6.91 LBS


  • For marine applications
  • Replaces the products 47-21754, 808282286453, 984537, 986232

Fits 7.5L / 460 King Cobra 1987-90

This product replaces:

    47-21754, 808282286453, 984537, 986232


We can ship to virtually any address in the US. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.)

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.

Need help? We're available at+1 (800) 664-8116 - Email us
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