8M0204693 Mercury MerCruiser 268M0204693 Yellow Drain Plug Washer | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Yellow Gear Lube Drain Screw Seal - Part Number: 26-8M0204693

A genuine Quicksilver yellow drain screw washer / seal used on Mercury, Mariner and MerCruiser gearcase drain, fill and vent screws. This is the newer yellow seal style replacing earlier 26-830749 and is used with standard 3/8"-16 gear lube drain screws where specified.

⚙️ Key Features

• Genuine Quicksilver OEM yellow drain screw seal

• Correct current Mercury part number 26-8M0204693

• Supersedes earlier 26-830749 seal washer

• Used with standard 3/8"-16 Mercury / MerCruiser gear lube drain screws

• Rubber-coated stainless washer design for improved tear resistance

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 26-8M0204693 → Supersedes 26-830749

• 26-830749 earlier yellow drain screw seal reference

OEM / Related Numbers:

• 26-8M0204693

• 8M0204693

• 268M0204693

• 26-830749

• 830749

• Yellow drain screw washer

• Yellow gear oil drain screw seal

• 3/8"-16 drain / fill screw seal

• 10-79953Q04 related magnetic drain screw

• 10-79953Q2 related drain screw

• 12-8M0187157 related blue drain screw washer for alternate applications

• 12-19183-3 earlier blue drain screw washer reference

Aftermarket / Verified Equivalents:

• Sierra: 18-24301-9

• Mallory: 9-60105

• Aftermarket yellow drain screw washer equivalents are available where matched to 26-8M0204693 / 26-830749

🚤 Compatibility

Commonly used on:

• Mercury / Mariner lower-unit drain and vent screws

• MerCruiser sterndrive drain, fill and vent screws

• Gearcase oil service on drives using a standard Mercury 3/8"-16 drain plug

Typically suits:

• Engine / drive models:

• MerCruiser Alpha One sterndrive drain / fill screw applications

• MerCruiser Alpha One Gen II sterndrive drain / fill screw applications

• MerCruiser Bravo One sterndrive drain / fill screw applications

• MerCruiser Bravo Two sterndrive drain / fill screw applications

• MerCruiser Bravo Three sterndrive drain / fill screw applications

• MerCruiser Vazer drive drain / fill screw applications where 26-8M0204693 is specified

• Mercury / Mariner 6HP to 300HP outboard gearcases using the standard 3/8"-16 gearcase drain / vent screw

• Mercury / Mariner EFI, DFI, OptiMax and Verado gearcase applications using the yellow drain screw seal

• Mercury high-performance outboard gearcases where 26-8M0204693 is specified

• HP Range: broad Mercury / Mariner outboard gearcase usage where the 3/8"-16 plug uses 26-8M0204693

• Engine / Drive Type: Mercury / Mariner outboard and MerCruiser sterndrive gear housing

• System Type: Gear lube drain / fill / vent screw seal

🔌 Function

The seal sits under the drain, fill or vent screw to seal the gearcase or sterndrive housing. It helps keep gear oil inside the gear housing and prevents water from entering through the drain plug seat.

Common signs of failure:

• Gear oil leaking around drain or vent screw

• Milky gear oil from water intrusion

• Drain plug seal flattened, torn or missing

• Failed lower-unit pressure or vacuum test

• Seal reused after gear oil change

• Replacement required during every gear lube service

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging