Free Shipping!
On All Orders Over $99*

click to zoom in

have questions?

Prop Nut Kit - Sierra Marine Engine Parts (18-73990)

(No reviews yet) Write a Review
0.27 LBS
Unit of Measure:
Manufacturer Part Number (MPN):

Prop Nut Kit - Sierra Marine Engine Parts (18-73990)


The Prop Nut Kit - Sierra Marine Engine Parts (18-73990) product from SeaStar Solutions is reliable, durable, and high-quality. This product does not harm the boat engine but only assists in the smooth and safe operations of the boat. The boat propeller is securely positioned against the shaft taper thanks to propeller nuts. It will be easy to complete the process with this kit because it includes all the necessary tools and parts. It's critical to keep thrust washers and propeller nuts in good condition since worn-out thrust washers and propeller nuts can harm the propeller shaft and propeller face. This propeller nut set will come in handy when it comes to changing and inspecting such boat parts.

Key Features:

  • Strong, reliable, and high-quality material
  • Constructed for quick and simple use
  • Improves boat engine performance
  • Prop Nut Kit includes:
  • Propeller Nut
  • Cotter Pin
  • Thrust Washer
  • Product replaces:
  • 6H4-W4599-00
  • 47-73990
  • 808282342876
  • 9-73990

Product Specifications:

  • Brand: Sea Star Solutions
  • SKU: 18-73990
  • UPC: 808282342876
  • Weight: 0.27 LBS
  • Manufacturer Part Number (MPN): 18-73990
  • Product Dimensions (length x width x height):2 x 6 x 6 inches

For Yamaha Outboard, Includes Prop Nut, Cotter Pin, and Thrust Washer

This product replaces:

    6H4-W4599-00, 47-73990, 808282342876, 9-73990


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
to top