26888593 Mercury MerCruiser Seal | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Engine Oil Drain Plug Seal - Part Number: 26-888593

A genuine Quicksilver sealing washer for the crankcase oil-drain plug on selected Mercury Verado four-stroke outboards.

The seal is compressed between the drain plug and engine housing to prevent engine oil escaping after an oil change. It should be renewed whenever the drain plug is removed rather than reused after it has been flattened or heat-cycled.

⚙️ Key Features

• Genuine Quicksilver OEM oil-drain plug seal

• Correct original Mercury part number 26-888593

• Superseded by current Mercury part number 26-8M0188614

• Used on Mercury Verado L4 and L6 four-stroke outboards

• Recommended replacement during routine engine-oil servicing

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 26-8M0188614 → Supersedes 26-888593

• 26-888593 earlier OEM oil-drain plug seal reference

OEM / Related Numbers:

• 26-8M0188614

• 8M0188614

• 26-888593

• 888593

• 26888593

• 745061635401

Aftermarket / Verified Equivalents:

• Recmar: REC26-888593

🚤 Compatibility

Commonly used on:

• Mercury Verado four-stroke crankcase oil-drain plugs

• Verado L4 and L6 engine-oil service applications

• Selected Mercury Racing supercharged outboards using the same drain-seal reference

Typically suits:

• Engine models:

• Mercury Verado 135HP L4 - serial 1B227001 to 1B381711

• Mercury Verado 150HP L4 - applicable 1B-series through 2B-series production

• Mercury Verado 175HP L4

• Mercury Verado 200HP L4

• Mercury Verado 200HP L6

• Mercury Verado 225HP L6

• Mercury Verado 250HP L6

• Mercury Verado 275HP L6 - serial 2B144123 to 2B578935

• Mercury Verado 300HP L6

• Mercury Verado 350HP L6 - serial 2B141617 to 3B342962

• Mercury Racing 350SCi

• Mercury Racing 400R / Verado L6 applications using seal 26-888593 or 26-8M0188614

• HP Range: 135HP - 400HP

• Engine Type: Mercury Verado supercharged L4 and L6 four-stroke outboard

• Year Range: Approximately 2005 onward, dependent on model and serial number

🔌 Function

The seal forms an oil-tight joint between the crankcase drain plug and engine housing. It prevents oil seepage while allowing the plug to be removed during scheduled oil changes.

Common signs of failure:

• Engine oil seeping around the drain plug

• Oil droplets beneath the drain location

• Seal visibly flattened, split or hardened

• Oil leakage beginning after an oil change

• Gradual reduction in engine-oil level

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging