O - Ring End Cap - Mercury / Mariner / Mercruiser 70-240 HP (1981-1982, 1988, 1990-1992, 1997-2000, 2004-2006, 2010, 2012-2014, 2018) OEM# 25-54029 | WSM 526-18

O-Ring End Cap Mercury / Mariner / Mercruiser 70 - 240 Hp OEM# 25-54029

This WSM o-ring end cap is a quality aftermarket replacement part designed for Mariner Bravo Two and 47 other compatible models.

It replaces selected OEM reference numbers including 25-54029 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 50 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 526-18
• Product: O-Ring End Cap
• OEM Reference: 25-54029
• Application: Mariner Bravo Two and 47 other compatible models

Product Fitment

This part is suitable for the following models:

• Mariner Bravo Two – All Years
• Mercruiser MC1 – All Years
• Mercruiser MC2 – All Years
• Mercruiser MC3 – All Years
• Mercruiser Racing Alpha – All Years
• Mercruiser Racing TR-TRS – All Years
• Mercruiser SSM2 – All Years
• Mercruiser SSM3 – All Years
• Mercruiser SSM4 – All Years
• Mercruiser Mercruiser – All Years
• Mercury 3 Cyl 3.375 Bore Looper 70 – All Years
• Mercury 3 Cyl 3.375 Bore Looper 75 – 1988-1990
• Mercury 3 Cyl 3.375 Bore Looper 80 – 1988-1990
• Mercury 3 Cyl 3.375 Bore Looper 90 – 1988-1990
• Mercury 6 Cyl 2.5L XS 200 – 1988-1990
• Mercury 6 Cyl 3.125 Bore 2L 135 – 2001-2006
• Mercury 6 Cyl 3.125 Bore 2L 150 – 1986-2000
• Mercury 6 Cyl 3.125 Bore 2L 175 – 1978-2005
• Mercury 6 Cyl 3.125 Bore 2L XR2 150 – 1976-1981
• Mercury 6 Cyl 3.375 Bore 2.4L 175 – 1986-1988
• Mercury 6 Cyl 3.375 Bore 2.4L 200 – 1981-1982
• Mercury 6 Cyl 3.375 Bore 2.4L 225 – 1978-1982
• Mercury 6 Cyl 3.375 Chrome Bore 2.4L 175 – 1980-1981
• Mercury 6 Cyl 3.375 Chrome Bore 2.4L 200 – 1983-1998
• Mercury 6 Cyl 3.375 Chrome Bore 2.4L 220 – 1982-1990
• Mercury 6 Cyl 3.375 Steel Bore 2.4L XR-4 150 – 1987-1991
• Mercury 6 Cyl 3.375 Steel Bore 2.4L XR-4 175 – 1988-1992
• Mercury 6 Cyl 3.501 Bore 2.5L 200 – 1991-1992
• Mercury 6 Cyl 3.501 Bore 2.5L EFI 150 – 1991-2005
• Mercury 6 Cyl 3.501 Bore 2.5L EFI 175 – 1992-2010
• Mercury 6 Cyl 3.501 Bore 2.5L EFI 200 – 1990-2004
• Mercury 6 Cyl 3.501 Bore 2.5L Jet 105 – 1978-1982
• Mercury 6 Cyl 3.501 Bore 2.5L Jet 110 – 1992-1999
• Mercury 6 Cyl 3.501 Bore 2.5L Jet 140 – 2006-2013
• Mercury 6 Cyl 3.501 Bore 2.5L Optimax 115 – 1992-2005
• Mercury 6 Cyl 3.501 Bore 2.5L Optimax 135 – 2000
• Mercury 6 Cyl 3.501 Bore 2.5L Optimax 150 – 1998-2012
• Mercury 6 Cyl 3.501 Bore 2.5L Optimax 175 – 1998-2014
• Mercury 6 Cyl 3.501 Bore 2.5L Pro Max 150 – 2001-2014
• Mercury 6 Cyl 3.501 Bore 2.5L Pro Max 200 – 1994-1998
• Mercury 6 Cyl 3.501 Bore 2.5L Pro Max 225 – 1994-2006
• Mercury 6 Cyl 3.501 Bore 2.5L Sport Jet 200 – 1995-2004
• Mercury 6 Cyl 3.501 Bore 2.5L Sport Jet 210 – 1997-2006
• Mercury 6 Cyl 3.501 Bore 2.5L Sport Jet 240 – 2001-2006
• Mercury 6 Cyl 3.501 Bore 2.5L XR6 150 – 2000-2005
• 6 Cyl 3.6265 Bore 2.5L Pro XS 150 6 Cyl 3.501 Bore 2.5L XRI 200 – 2000-2006
• Mercury 6 Cyl 3.6265 Bore 2.5L Pro XS 150 – 1992-1998
• 6 Cyl 3.501 Bore 2.5L Pro XS 175 – 1992-1997
• 2010-2018
• 2008-2018

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.

You May Also Need

Browse related parts for compatible models:

• Divider Plate Seal Mercury / Mariner 105 - 240 Hp 76-18 OEM# 26-814754 – 540-35
• Drain Plug Gasket Johnson / Evinrude / Mercury / Mariner / Mercruiser / Force / OMC 5 - 300 Hp OEM# 0307552 – 555-11
• Drain Plug Gasket Johnson / Evinrude / Mercury / Mariner / Mercruiser / Force / OMC 5 - 300 Hp OEM# 0307552 – 555-11-01
• Drain Plug Gasket Johnson / Evinrude / Mercury / Mariner / Mercruiser / Force / OMC 5 - 300 Hp OEM# 0307552 – 555-11-10

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