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O-Ring (Pack Of 5) - Sierra Marine Engine Parts - 18-7145-9 (118-7145-9)

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0.01 LBS
Alternate Products SKU:
"333572-PK", "25-01675-1", "64068-PK", "18-7145-9"
Manufacturer Part Number (MPN):

O-Ring (Pack Of 5) - Sierra Marine Engine Parts - 18-7145-9 (118-7145-9)


The clamping pressure surrounding the combustion chamber is increased using an O-Ring.

The 18-7145-9 O-RING from Sea Star Solutions is designed to improve cylinder sealing in high-pressure situations. The metal parts encircle the bore and chamber, improving the head gasket's ability to seal. An O-ring is a gasket that joins two surfaces through a circular loop. The oil can run into the valve guides, which are burned inside the combustion chamber if this small and otherwise uncomplicated component is absent.

Key Features

  • Can resist the most pressure when sealing.
  • Two working surfaces are naturally compressed and sealed by high-performance sealing power, preventing air or liquid leakage.
  • O-rings are a great option since they can withstand high temperatures and are resistant to moisture, silicone, steam, and oil.
  • It does not deteriorate.
  • Five pieces come in each pack.


  • BRAND: Sea Star Solutions
  • SKU: 18-7145-9
  • UPC: 808282165246
  • Weight: 0.01 LBS
  • Alternate Products SKU: "333572-PK", "25-01675-1", "64068-PK", "18-7145-9"
  • Unit Of Measure: PK
  • Manufacturer Part Number (MPN): 118-7145-9
  • I.D.: 0.250" or 6.35mm
  • Width: 0.100" or 2.54mm

I.D.: 0.250" or 6.35mm, Width: 0.100" or 2.54mm

This product replaces:

    47-7145, 47-7145-9, 47-71459, 808282165246, 18-7145, AP478


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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