O - Ring Oil Pump - Mercury / Mariner 105-300 HP (1981-1982, 1988, 1990-1992, 1998-2001, 2004-2006) OEM# 25-11379 | WSM 526-21

O-Ring Oil Pump Mercury / Mariner 105 - 300 Hp OEM# 25-11379

This WSM o-ring oil pump is a quality aftermarket replacement part designed for Mariner 6 Cyl 3.125 Bore 2L 135 and 27 other compatible models.

It replaces selected OEM reference numbers including 25-11379 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 30 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 526-21
• Product: O-Ring Oil Pump
• OEM Reference: 25-11379
• Application: Mariner 6 Cyl 3.125 Bore 2L 135 and 27 other compatible models

Product Fitment

This part is suitable for the following models:

• Mariner 6 Cyl 3.125 Bore 2L 135 – All Years
• 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 Chrome Bore 2.4L 175 – 1980-1982
• Mercury 6 Cyl 3.375 Chrome Bore 2.4L 200 – 1983-1999
• Mercury 6 Cyl 3.375 Chrome Bore 2.4L 220 – 1982-1990
• Mercury Mercury – 1987-1991
• Mercury 6 Cyl 3.501 Bore 2.5L 200 – 1988-1992
• Mercury 6 Cyl 3.501 Bore 2.5L EFI 150 – 1991-2005
• Mercury 6 Cyl 3.501 Bore 2.5L EFI 175 – 1992-2001
• Mercury 6 Cyl 3.501 Bore 2.5L EFI 200 – 1991-2001
• Mercury 6 Cyl 3.501 Bore 2.5L Jet 105 – 1991-2001
• Mercury 6 Cyl 3.501 Bore 2.5L Jet 140 – 1992-1999
• Mercury 6 Cyl 3.501 Bore 2.5L Pro Max 150 – 1992-2005
• 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 175 – 1994-2004
• Mercury 6 Cyl 3.501 Bore 2.5L Sport Jet 210 – 1997-2006
• Mercury 6 Cyl 3.501 Bore 2.5L Sport Jet 240 – 2000-2005
• Mercury 6 Cyl 3.501 Bore 2.5L XR6 150 – 2000-2006
• Mercury 6 Cyl 3.625 Bore 3L 225 – 1992-1998
• Mercury 6 Cyl 3.625 Bore 3L EFI 225 – 1994-2001
• Mercury 6 Cyl 3.625 Bore 3L EFI 250 – 1995-2001
• 6 Cyl 3.625 Bore 3L Pro Max 300 – 1995-2001
• 6 Cyl 3L Carb Sea Pro 225 – 1998-2000
• 1995-2001
• 2000-2005

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:

• O-Ring End Cap Mercury / Mariner / Mercruiser 90 - 485 Hp OEM# 25-62700 – 526-19
• 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.