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Mercury Prop Nut - Sierra Marine Engine Parts - 18-3700 (118-3700)

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0.12 LBS
Alternate Products SKU:
"11-00121", "18-3700"
Manufacturer Part Number (MPN):

Mercury Prop Nut - Sierra Marine Engine Parts - 18-3700 (118-3700)


The MERC PROP NUT 18-3700 is quality propeller nuts that meet or exceed the original equipment part it replaces. It has an exact specification and snuggly fits in your propeller to avoid coming off when running your outboard. Where friction-induced heating is utilized to transfer metal from one surface to another, the MERC PROP NUT 18-3700 design minimizes galling. It damages the threading of the propeller shaft. The MERC PROP NUT 18-3700 made by Sierra can withstand the severe marine environment and the high horsepower engine requirement. If you need to replace the propeller shaft, the MERC PROP NUT 18-3700 is a perfect replacement nut.

Key Features

  • 3/4"- 20Thread

  • Fits Mercury Outboards 70HP (1987-1989),75-300 hp,65HP Model 650, 40/60 Sea Pro,40/50/60 4-Stroke Bigfoot Command Thrust Marathon

  • Fits Mercruiser Sterndrive Alpha One, Bravo One

  • Replaces Mercury/Mercruiser 11-52707, , HONDA 90301-ZW1-003, Pleasurecraft RO17066, OEM: CHRYSLER FORCE F7000, MERCURY MARINE 11-52707, 11-52707Q 1, PLEASURECRAFT R017066.



  • SKU:18-3700

  • UPC:030999236944

  • Weight:0.12 LBS

  • Unit Of Measure:EA

  • Alternate Products SKU:"11-00121", "18-3700"


This product replaces:

    7000, 47-3700, F7000, GLM21230, R017066, 11-52707, 3099923694, 30999236944, 92-21230D, 90301-ZW1-003


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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