GHmarine 79953Q04 oil vent plug kit with two plugs and four gaskets.
GHmarine lower unit gearcase drain plug set for MerCruiser and Mercury engines.
GHmarine compatibility guide shows MerCruiser stern drives and Mariner outboards with plugs for reliable fits.
Non-magnetic plug screw design helps minimize leaks and water intrusion.
Two-pack with spare gaskets for quick future maintenance.
GHmarine 79953Q04 oil vent plug kit with two plugs and four gaskets.
GHmarine lower unit gearcase drain plug set for MerCruiser and Mercury engines.
GHmarine compatibility guide shows MerCruiser stern drives and Mariner outboards with plugs for reliable fits.
Non-magnetic plug screw design helps minimize leaks and water intrusion.
Two-pack with spare gaskets for quick future maintenance.

GHmarine 79953Q04 Oil Vent Plug Kit for MerCruiser & Mercury Gearcase – 2-Pack with Gaskets

OverviewMaintain the integrity of your lower unit with the GHmarine 79953Q04 Oil Vent Plug Kit. This practical...
Vendor: GHmarine
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£27.88
£27.88
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GHmarine 79953Q04 oil vent plug kit with two plugs and four gaskets.

GHmarine 79953Q04 Oil Vent Plug Kit for MerCruiser & Mercury Gearcase – 2-Pack with Gaskets

£27.88
GHmarine 79953Q04 oil vent plug kit with two plugs and four gaskets.
GHmarine lower unit gearcase drain plug set for MerCruiser and Mercury engines.
GHmarine compatibility guide shows MerCruiser stern drives and Mariner outboards with plugs for reliable fits.
Non-magnetic plug screw design helps minimize leaks and water intrusion.
Two-pack with spare gaskets for quick future maintenance.

GHmarine 79953Q04 Oil Vent Plug Kit for MerCruiser & Mercury Gearcase – 2-Pack with Gaskets

£27.88
Description
Description
x

Overview

Maintain the integrity of your lower unit with the GHmarine 79953Q04 Oil Vent Plug Kit. This practical two-pack includes oil vent plugs and four gaskets, giving you immediate spares for routine service or on-the-water maintenance.

What’s included and where it fits

  • Two oil vent plugs designed for drain or vent holes on a variety of stern drives and outboards
  • Four gaskets to ensure reliable seals during reassembly
  • A two-pack setup that supports regular maintenance and quick, on-site repairs

Compatibility and fitment

  • Designed for use with 3/8-16 drain or fill hole screws
  • Seamless compatibility with MerCruiser stern drives, Mercury and Mariner outboards
  • Broad Sierra Marine compatibility including models such as 10-20259, 10-79953Q04, 10-79953Q2, 10-79953A2, 10-28634, 10-28634A1, 816610A2, 816610A1, 18-2244
  • Note: Verado series is not covered by this kit

Design and protection

The kit uses a non-magnetic plug screw, a choice that helps minimize sticking and supports resistance to water intrusion. The robust construction is built to withstand regular maintenance cycles.

Practical use and potential benefits

  • On-time drain and fill maintenance without hunting for compatible parts
  • Reliable backup gaskets to reduce downtime during service
  • Non-magnetic screws and solid build may help preserve the lower unit’s integrity

GHmarine parts are designed to support boating projects with practical, straightforward components. This kit offers a realistic, flexible option for maintenance planning and on-site repairs, presenting possibilities rather than guarantees for gearcase care.

FAQ

Q: What is included in the GHmarine 79953Q04 Oil Vent Plug kit?

A: Two oil vent plugs and four gaskets are included, plus backups for future service.

Q: Which engines and fittings does this kit support?

A: Designed for 3/8-16 drain holes, it fits MerCruiser stern drives and Mercury/Mariner outboards, excluding Verado.

Shipping & Return
Shipping & Return
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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, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. 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.

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