O - Ring End Cap - Mercury / Mariner / Mercruiser 30-135 HP (1971-1972, 1985, 1989, 1997) OEM# 25-20081 | WSM 526-10

O-Ring End Cap Mercury / Mariner / Mercruiser 30 - 135 Hp OEM# 25-20081

This WSM o-ring end cap is a quality aftermarket replacement part designed for Mariner Bravo Two and 12 other compatible models.

It replaces selected OEM reference numbers including 25-20081 and is suitable for service, repair and rebuild work.

Key Features

• Quality aftermarket replacement part from WSM
• Engineered for dependable fit, function and service life
• Designed for marine and powersports repair and maintenance
• Compatible with 14 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 526-10
• Product: O-Ring End Cap
• OEM Reference: 25-20081
• Application: Mariner Bravo Two and 12 other compatible models

Product Fitment

This part is suitable for the following models:

• Mariner Bravo Two – All Years
• Mercruiser MC3 – All Years
• Mercruiser SSM2 – All Years
• Mercruiser SSM3 – All Years
• Mercruiser SSM4 – All Years
• Mercruiser 4 Cyl 2.565 Bore Cross Flow 30 – All Years
• Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1989-1997
• Mercury 4 Cyl 2.565 Bore Cross Flow 45 – 1989-1997
• Mercury 4 Cyl 2.565 Bore Cross Flow 50 – 1980-1989
• Mercury Mercury – 1970-1985
• Mercury 4 Cyl 80 – 1970-1971
• Mercury 6 Cyl 2.875 Bore Cross Flow 115 – 1970-1972
• 6 Cyl 2.875 Bore Cross Flow 135 – 1970-1972
• 1970-1971

Why Buy WSM

WSM is a trusted manufacturer of aftermarket marine and powersports parts, known for dependable quality, strong fitment coverage and workshop-ready replacement components.

About the Mercury 135-200 HP Outboard Engines

Mercury and Mariner 135-200 HP outboard engines are widely used across recreational and performance boating applications. These engines have long-standing aftermarket support, making quality replacement gaskets, ignition, fuel and powerhead parts important for service and rebuild work.

You May Also Need

Browse related parts for compatible models:

• Fuel Pump Mercury / Mariner 30 - 300 Hp 83-04 OEM# 14360A14 – 600-090-05
• Ignition Coil Mercury / Mariner 6 - 300 Hp 72-07 OEM# 184-0001 – 376-5186
• O-Ring End Cap Mercury / Mariner / Mercruiser 30 - 150 Hp 72-97 OEM# 218 – 526-12
• Drain Plug Gasket Johnson / Evinrude / Mercury / Mariner / Mercruiser / Force / OMC 5 - 300 Hp OEM# 0307552 – 555-11

Please use the fitment guide, OEM references and images to confirm this is the correct part before ordering.