Sold out -15% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring #18-0858
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Sierra Sierra O-Ring #18-0858 $2.91 $3.42
Sierra 18-0858 O-RingsSierra O-Ring #18-0858OEM Interchange:MERCURY MARINE: 25-54029Sierra O-Ring #18-0858Normalized SKU: 180858UPC Code: 030999751492
Sold out -16% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring #18-0175
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Sierra Sierra O-Ring #18-0175 $3.67 $4.32
Sierra 18-0175 O-RingsSierra O-Ring #18-0175OEM Interchange:MERCURY MARINE: 25-26543Sierra O-Ring #18-0175Normalized SKU: 180175UPC Code: 030999751331
Sold out -16% sale
Sierra Not Qualified for Free Shipping Sierra Bowl O-Ring #18-0179
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Sierra Sierra Bowl O-Ring #18-0179 $2.26 $2.66
Sierra 18-0179 O-RingsSierra Bowl O-Ring #18-0179OEM Interchange:RACOR: RK22244Sierra Bowl O-Ring #18-0179Normalized SKU: 180179UPC Code: 808282265397
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 10-pk #18-7113-9
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Sierra Sierra O-Ring 10-pk #18-7113-9 $15.98 $19.07
Sierra 18-7113-9 O-RingsO-Ring (Priced Per Pkg of 10)OEM Interchange:MERCURY MARINE: 25-897536Sierra O-Ring (Priced Per Pkg of 10) #18-7113-9Normalized SKU: 1871139UPC Code: 808282187514
-15% sale
Sierra Not Qualified for Free Shipping Sierra Drain Screw O-Ring 5-pk #18-4253-9
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Sierra Sierra Drain Screw O-Ring 5-pk #18-4253-9 $3.15 $3.70
Sierra 18-4253-9 O-RingsDrain Screw O-Ring (Priced Per Pkg of 5)OEM Interchange:OMC: 336982Sierra Drain Screw O-Ring (Priced Per Pkg of 5) #18-4253-9Normalized SKU: 1842539UPC Code: 808282187118
Sold out -17% sale
Sierra Drain Screw O-Ring 50-pk #18-42531-9
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Sierra Sierra Drain Screw O-Ring 50-pk #18-42531-9 $21.37 $25.51
Sierra 18-42531-9 O-RingsDrain Screw O-Ring (Priced Per Pkg of 50)OEM Interchange:OMC: 336982Sierra Drain Screw O-Ring (Priced Per Pkg of 50) #18-42531-9Normalized SKU: 18425319UPC Code: 808282187125
Sold out -15% sale
Sierra O-Ring 2-pk #18-7440-1-9
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Sierra Sierra O-Ring 2-pk #18-7440-1-9 $3.69 $4.34
Sierra 18-7440-1-9 O-Rings O-Ring (Priced Per Pkg of 2) Features: Package of 2 Additional Details: I.D.: 0.799" or 20.3mm Width: 0.103" or 2.6mm GLM 81170 Johnson/Evinrude Outboard 301967 Mallory 9-76574 Mercruiser Stern Drive 25-36318 Mercury Marine 25-36318 Sierra O-Ring (Priced Per Pkg of 2) #18-7440-1-9 Normalized SKU: 18744019UPC Code: 808282198008
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring #18-7963
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Sierra Sierra O-Ring #18-7963 $11.98 $14.30
Sierra 18-7963 O-RingsO-RingOEM Interchange:OMC: 331353Sierra O-Ring #18-7963Normalized SKU: 187963UPC Code: 808282106232
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7956-9
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Sierra Sierra O-Ring 5-pk #18-7956-9 $20.09 $23.98
Sierra 18-7956-9 O-RingsO-Ring (Priced Per Pkg of 5)Sierra O-Ring (Priced Per Pkg of 5) #18-7956-9Normalized SKU: 1879569UPC Code: 808282166151
Sold out -16% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring #18-7950
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Sierra Sierra O-Ring #18-7950 $0.39 $0.46
Sierra 18-7950 O-RingsO-RingOEM Interchange:CHRYSLER FORCE: 25-45258Sierra O-Ring #18-7950Normalized SKU: 187950UPC Code: 808282260033
Sold out -17% sale
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Sierra Sierra O-Ring 5-pk #18-7952-9 $25.40 $30.32
Sierra 18-7952-9 O-RingsO-Ring (Priced Per Pkg of 5)Sierra O-Ring (Priced Per Pkg of 5) #18-7952-9Normalized SKU: 1879529UPC Code: 808282166144
Sold out -17% sale
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Sierra Sierra O-Ring 5-pk #18-7511-9 $10.90 $13.01
Sierra 18-7511-9 O-RingsO-Ring (Priced Per Pkg of 5)Sierra O-Ring (Priced Per Pkg of 5) #18-7511-9Normalized SKU: 1875119UPC Code: 808282166465
Sold out -17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7510-9
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Sierra Sierra O-Ring 5-pk #18-7510-9 $18.68 $22.29
Sierra 18-7510-9 O-RingsO-Ring (Priced Per Pkg of 5)Sierra O-Ring (Priced Per Pkg of 5) #18-7510-9Normalized SKU: 1875109UPC Code: 808282166458
Sold out -16% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring #18-7483
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Sierra Sierra O-Ring #18-7483 $3.21 $3.78
Sierra 18-7483 O-RingsO-RingOEM Interchange:YAMAHA: 93210-37M67-00Sierra O-Ring #18-7483Normalized SKU: 187483UPC Code: 030999876409
Sold out -15% sale
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Sierra Sierra Quad Ring 5-pk #18-7480-9 $2.06 $2.42
Sierra 18-7480-9 O-RingsQuad Ring (Priced Per Pkg of 5)Sierra Quad Ring (Priced Per Pkg of 5) #18-7480-9Normalized SKU: 1874809UPC Code: 808282166113
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 2-pk #18-7481-9
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Sierra Sierra O-Ring 2-pk #18-7481-9 $19.08 $22.77
Sierra 18-7481-9 O-RingsO-Ring (Priced Per Pkg of 2)Sierra O-Ring (Priced Per Pkg of 2) #18-7481-9Normalized SKU: 1874819UPC Code: 808282166120
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring #18-7485
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Sierra Sierra O-Ring #18-7485 $12.51 $14.93
Sierra 18-7485 O-RingsO-RingOEM Interchange:YAMAHA: 93210-86M38-00Sierra O-Ring #18-7485Normalized SKU: 187485UPC Code: 030999876416
-17% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring 5-pk #18-7475-9
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Sierra Sierra O-Ring 5-pk #18-7475-9 $15.44 $18.43
Sierra 18-7475-9 O-RingsO-Ring (Priced Per Pkg of 5)Sierra O-Ring (Priced Per Pkg of 5) #18-7475-9Normalized SKU: 1874759UPC Code: 808282166090
Sold out -16% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring #18-7474
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Sierra Sierra O-Ring #18-7474 $3.38 $3.98
Sierra 18-7474 O-RingsO-RingOEM Interchange:MERCURY MARINE: 25-94288Sierra O-Ring #18-7474Normalized SKU: 187474UPC Code: 030999876386
Sold out -15% sale
Sierra Not Qualified for Free Shipping Sierra O-Ring #18-7464
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Sierra Sierra O-Ring #18-7464 $5.70 $6.70
Sierra 18-7464 O-RingsO-RingOEM Interchange:MERCURY MARINE: 25-39695Sierra O-Ring #18-7464Normalized SKU: 187464UPC Code: 030999876331

Frequently Asked Questions

First Choice Marine is an online marine retailer carrying a diverse line of marine parts and accessories and related items from industry-respected and demanded manufacturers and suppliers. Through our diverse distributor network, we are able to access over 150,000 items, including our current site inventory, new products being added, and special order items. If you need it on your boat... we are your one-stop shop!

Yes, we offer FREE Shipping on most orders over $149 to US-48*.

Each product displays a shipping status message, just above the item price. Below is the meaning for each of these codes.

  • Qualifies for Free Shipping: This item qualifies for free shipping when the order is $149+
  • Qualifies for Free Ground Shipping: This item qualifies for free ground shipping when the order is $149+.
  • Oversized - Not Qualified for Free Shipping: This item is too large/heavy to qualify for free shipping
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  • In-Store Pickup Only: This item can only be picked up in our Grain Valley, MO retail store

Below the price of the item, on the product page, there is a message indicating the availability of the product.

The quantity on hand is updated as inventory events happen and matches what we have available. If you have urgent needs and we are close to what you need, contact us, and we can confirm stock.

We offer a hassle-free return policy. If you're not completely satisfied with your purchase, you can return it within 30 days for a full refund or exchange.

If you need to return an item, please follow the guidelines here so we can process a prompt refund and assist you in finding the correct item.

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