O - Ring End Cap - Mercury / Mariner / Mercruiser 30-150 HP (1976-1978, 1981-1983, 1986, 1988, 1990, 1997) OEM# 218 | WSM 526-12

O-Ring End Cap Mercury / Mariner / Mercruiser 30 - 150 Hp 72-97 OEM# 218

This WSM o-ring end cap is a quality aftermarket replacement part designed for Mariner 3 Cyl 2.875 Bore Cross Flow 50 and 12 other compatible models.

It replaces selected OEM reference numbers including 218, 25-32546, 80420, S18-7161 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 15 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 526-12
• Product: O-Ring End Cap
• OEM Reference: 218, 25-32546, 80420, S18-7161
• Application: Mariner 3 Cyl 2.875 Bore Cross Flow 50 and 12 other compatible models

Product Fitment

This part is suitable for the following models:

• Mariner 3 Cyl 2.875 Bore Cross Flow 50 – All Years
• Mercruiser 3 Cyl 2.875 Bore Cross Flow 60 – All Years
• Mercury 3 Cyl 2.875 Bore Cross Flow 65 – 1983-1990
• Mercury 3 Cyl 2.875 Bore Cross Flow 70 – 1984-1990
• Mercury 4 Cyl 2.565 Bore Cross Flow 30 – 1972-1976
• Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1977-1983
• Mercury 4 Cyl 2.875 Bore Cross Flow 75 – 1989-1997
• Mercury 4 Cyl 2.875 Bore Cross Flow 80 – 1989-1997
• Mercury Mercury – 1984-1986
• Mercury 6 Cyl 2.875 Bore Cross Flow 115 – 1978-1982
• Mercury 6 Cyl 2.875 Bore Cross Flow 140 – 1973-1977
• Mercury 6 Cyl 2.875 Bore Cross Flow 150 – 1973-1988
• Mercury 6 Cyl 2.875 Bore Cross Flow 90 – 1978-1981
• 1973-1978
• 1978-1988

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:

• Ignition Coil Mercury / Mariner 6 - 300 Hp 72-07 OEM# 184-0001 – 376-5186
• Bearing Needles Force / Mercury / Mariner 35 - 150 Hp OEM# 31-62596A1 – 010-138
• Bearing Needles Force / Mercury / Mariner 35 - 150 Hp OEM# 31-62596A1 – 010-138-16
• Mounting Lock Nut Mercury / Mariner / Mercruiser 30 - 900 Hp OEM# 11-34933 – 445-222

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