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OEM Mercury & MerCruiser Oil Drain Plug Seal
Mercury MerCruiser Oil Drain Plug O-Ring 863006
The Mercury MerCruiser 863006 Oil Drain Plug O-Ring is an OEM replacement seal used across a wide range of Mercury outboards, Verado engines, MerCruiser sterndrives, and inboard marine engines.
This O-ring seals the oil drain plug assembly and helps prevent oil leaks during operation and after routine oil service.
Fitment Overview
OEM part number 863006 is used across numerous Mercury and MerCruiser oil drain plug applications. Unlike the drain plug assembly itself, this seal is shared across multiple engine families and marine platforms.
This includes Mercury EFI outboards, Verado engines, V6/V8/V10 outboards, MerCruiser sterndrive engines, and select inboard marine engines.
Compatibility
| Application | Models / Engine Families |
|---|---|
| Mercury EFI 4-Stroke Outboards | 65HP through 150HP EFI models |
| Mercury V6 Outboards | 3.4L V6 175HP and 200HP |
| Mercury V8 Outboards | 4.6L V8 200HP through 300HP |
| Mercury V10 Outboards | 350HP 400HP 425HP models |
| Mercury Racing | 300R 450R 500R Verado applications |
| MerCruiser Sterndrive Engines | Multiple GM-based marine engine platforms |
| MerCruiser Inboard Engines | Select inboard oil drain plug applications |
Always verify fitment using your engine serial number or existing part number before ordering.
Associated Oil Drain Plug Assemblies
In those cases, replacing the complete drain plug assembly is recommended:
View Mercury 8M0112869 Oil Drain Plug Assembly
Part Numbers and Cross References
| Type | Part Number |
|---|---|
| Mercury OEM | 863006 |
| Associated Drain Plug Assembly | 8M0112869 |
| Related Drain Plug Assemblies | 8M0064964, 8M0045813 |
What This O-Ring Is Used For
This O-ring seals the oil drain plug assembly to prevent oil leaks and seepage. Over time, heat cycles, oil exposure, and repeated removal during oil changes can flatten or damage the seal.
- Seals engine oil drain plug assemblies
- Helps prevent oil leaks after service
- OEM Mercury and MerCruiser replacement seal
- Often replaced during routine oil maintenance
Replacing the O-ring during oil service is often the easiest and most affordable way to prevent future leaks.
System Function and Connections
- System Type: Engine lubrication / oil drain system
- Component Type: Oil drain plug O-ring seal
- Associated Components: Oil drain plug assemblies and oil pan drain systems
- Location: Oil drain plug sealing surface
FAQ
What does the 863006 O-ring fit?
It fits many Mercury and MerCruiser oil drain plug applications including EFI outboards,
Verado engines, V6/V8/V10 outboards, and select sterndrive and inboard engines.
Can I replace just the O-ring instead of the entire drain plug assembly?
Yes. If the drain plug assembly itself is still in good condition and only the seal is leaking,
replacing the O-ring is often the simplest repair.
When should I replace the full drain plug assembly?
Replace the entire assembly if the plug is cracked, stripped, damaged,
or leaking around the plug body itself.
What drain plug assembly commonly uses this O-ring?
One common associated assembly is the Mercury
8M0112869 Oil Drain Plug Assembly
.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 (continental U.S.).
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Part Numbers
863006, Mercury oil drain plug o-ring, Mercury oil plug seal, MerCruiser oil drain seal, Mercury Verado oil plug o-ring, Mercury V6 oil seal, Mercury V8 oil drain plug seal, Mercury V10 oil plug seal, 8M0112869, Mercury oil drain plug gasket
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