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Prop Nut - Sierra Marine Engine Parts - 18-3726 (118-3726)

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0.14 LBS
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Prop Nut - Sierra Marine Engine Parts - 18-3726 (118-3726)


The prop nuts keep the propeller tightly seated against the shaft taper. Because the propeller continuously pushes into the shaft due to the engine's power, prop nuts don't take much stress in a typical operation. There may be some load on the nuts in the other direction, but it is just momentary and nothing to be concerned.

Two different-sized nuts keep a propeller in place on a propeller shaft. The Prop Nut is a piece of hardware that helps your trolling motor run more efficiently, last longer, and be quieter. The ELIMINATOR Prop Nut stabilizes the prop by offering a contact point with a patent-pending design to reduce prop noise and vibration.

Over 6,000 maritime parts, tools, and components are available as Sierra aftermarket replacements. Sierra's products withstand tough marine environments and meet or exceed OEM specifications.

Key Features:

  • Sierra 18-3726 Prop Nut
  • For Suzuki and Yamaha outboards, Sierra prop nut replacement.
  • Interchangeable with:
  • GLM
  • 21241
  • Mallory
  • 9-73909
  • Suzuki Outboard
  • 09141-18005
  • Yamaha Outboard
  • 90171-18M04-00


  • SKU: 18-3726
  • UPC: 030999975942
  • Weight: 0.13 LBS

Prop Nut fitting Yamaha and Suzuki Outboard applications

This product replaces:

    47-3726, GLM21241, 09141-18005, AP1830, 3099997594, 30999975942, 9-73909, 92-21241, 90171-18M04-00


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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