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SensorTemperature - Mercury / Mariner 35-300 HP (1976-1997) OEM# 12415 | WSM 778-104

SensorTemperature - Mercury / Mariner 35-300 HP (1976-1997) OEM# 12415 | WSM 778-104

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SensorTemperature Mercury / Mariner 35 - 300 Hp 76-97 OEM# 12415

This WSM sensortemperature is a quality aftermarket replacement part designed for Mercury 2 Cyl 2.875 Bore Cross Flow 35 and 20 other compatible models.

It replaces selected OEM reference numbers including 12415 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 92 listed fitments
  • Replaces selected OEM reference numbers listed below

Product Details

  • Brand: WSM
  • WSM Part Number: 778-104
  • Product: SensorTemperature
  • OEM Reference: 12415
  • Application: Mercury 2 Cyl 2.875 Bore Cross Flow 35 and 20 other compatible models

Product Fitment

This part is suitable for the following models:

  • Mercury 2 Cyl 2.875 Bore Cross Flow 35 – 1987
  • Mercury 2 Cyl 2.875 Bore Cross Flow 35 – 1988
  • Mercury 2 Cyl 2.875 Bore Cross Flow 35 – 1989
  • Mercury 3 Cyl 2.875 Bore Cross Flow 50 – 1987
  • Mercury 3 Cyl 2.875 Bore Cross Flow 50 – 1988
  • Mercury 3 Cyl 2.875 Bore Cross Flow 50 – 1989
  • Mercury 3 Cyl 2.875 Bore Cross Flow 50 – 1990
  • Mercury 3 Cyl 2.875 Bore Cross Flow 60 – 1987
  • Mercury 3 Cyl 2.875 Bore Cross Flow 60 – 1988
  • Mercury 3 Cyl 2.875 Bore Cross Flow 60 – 1989
  • Mercury 3 Cyl 2.875 Bore Cross Flow 60 – 1990
  • Mercury 3 Cyl 3.375 Bore Looper 70 – 1988
  • Mercury 3 Cyl 3.375 Bore Looper 70 – 1989
  • Mercury 3 Cyl 3.375 Bore Looper 70 – 1990
  • Mercury 3 Cyl 3.375 Bore Looper 75 – 1988
  • Mercury 3 Cyl 3.375 Bore Looper 75 – 1989
  • Mercury 3 Cyl 3.375 Bore Looper 75 – 1990
  • Mercury 3 Cyl 3.375 Bore Looper 80 – 1988
  • Mercury 3 Cyl 3.375 Bore Looper 80 – 1989
  • Mercury 3 Cyl 3.375 Bore Looper 80 – 1990
  • Mercury 3 Cyl 3.375 Bore Looper 90 – 1988
  • Mercury 3 Cyl 3.375 Bore Looper 90 – 1989
  • Mercury 3 Cyl 3.375 Bore Looper 90 – 1990
  • Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1989
  • Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1990
  • Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1991
  • Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1992
  • Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1993
  • Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1994
  • Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1995
  • Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1996
  • Mercury 4 Cyl 2.565 Bore Cross Flow 40 – 1997
  • Mercury 4 Cyl 3.375 Bore Looper 100 – 1985
  • Mercury 4 Cyl 3.375 Bore Looper 100 – 1986
  • Mercury 4 Cyl 3.375 Bore Looper 100 – 1987
  • Mercury 4 Cyl 3.375 Bore Looper 100 – 1988
  • Mercury 4 Cyl 3.375 Bore Looper 100 – 1989
  • Mercury 4 Cyl 3.375 Bore Looper 100 – 1990
  • Mercury 4 Cyl 3.375 Bore Looper 100 – 1991
  • Mercury 4 Cyl 3.375 Bore Looper 100 – 1992
  • Mercury 4 Cyl 3.375 Bore Looper 100 – 1993
  • Mercury Mercury – 1989
  • Mercury Mercury – 1990
  • Mercury Mercury – 1991
  • Mercury Mercury – 1992
  • Mercury Mercury – 1993
  • Mercury 6 Cyl 250 – 1989
  • Mercury 6 Cyl 250 – 1990
  • Mercury 6 Cyl 275 – 1989
  • Mercury 6 Cyl 275 – 1990
  • Mercury 6 Cyl 275 – 1991
  • Mercury 6 Cyl 275 – 1992
  • Mercury 6 Cyl 275 – 1993
  • Mercury 6 Cyl 275 – 1994
  • Mercury 6 Cyl 3.125 Bore 2L 135 – 1986
  • Mercury 6 Cyl 3.125 Bore 2L 135 – 1987
  • Mercury 6 Cyl 3.125 Bore 2L 135 – 1988
  • Mercury 6 Cyl 3.125 Bore 2L 150 – 1978
  • Mercury 6 Cyl 3.125 Bore 2L 150 – 1979
  • Mercury 6 Cyl 3.125 Bore 2L 150 – 1980
  • Mercury 6 Cyl 3.125 Bore 2L 150 – 1981
  • Mercury 6 Cyl 3.125 Bore 2L 150 – 1982
  • Mercury 6 Cyl 3.125 Bore 2L 150 – 1983
  • Mercury 6 Cyl 3.125 Bore 2L 150 – 1984
  • Mercury 6 Cyl 3.125 Bore 2L 150 – 1985
  • Mercury 6 Cyl 3.125 Bore 2L 175 – 1976
  • Mercury 6 Cyl 3.125 Bore 2L 175 – 1977
  • Mercury 6 Cyl 3.125 Bore 2L 175 – 1978
  • Mercury 6 Cyl 3.125 Bore 2L 175 – 1979
  • Mercury 6 Cyl 3.125 Bore 2L 175 – 1980
  • Mercury 6 Cyl 3.125 Bore 2L XR2 150 – 1986
  • Mercury 6 Cyl 3.125 Bore 2L XR2 150 – 1987
  • Mercury 6 Cyl 3.125 Bore 2L XR2 150 – 1988
  • Mercury 6 Cyl 3.375 Bore 2.4L 200 – 1978
  • Mercury 6 Cyl 3.375 Bore 2.4L 200 – 1979
  • Mercury 6 Cyl 3.375 Bore 2.4L 200 – 1980
  • Mercury 6 Cyl 3.375 Chrome Bore 2.4L 175 – 1985
  • Mercury 6 Cyl 3.375 Chrome Bore 2.4L 175 – 1986
  • Mercury 6 Cyl 3.375 Chrome Bore 2.4L 175 – 1987
  • Mercury 6 Cyl 3.375 Chrome Bore 2.4L 175 – 1988
  • Mercury 6 Cyl 3.375 Chrome Bore 2.4L 200 – 1982
  • Mercury 6 Cyl 3.375 Chrome Bore 2.4L 200 – 1983
  • Mercury 6 Cyl 3.375 Chrome Bore 2.4L 200 – 1984
  • Mercury 6 Cyl 3.375 Chrome Bore 2.4L 200 – 1985
  • Mercury 6 Cyl 3.375 Chrome Bore 2.4L 200 – 1986
  • 6 Cyl 3.375 Chrome Bore 2.4L 200 – 1987
  • 6 Cyl 3.375 Chrome Bore 2.4L 200 – 1988
  • 6 Cyl 300 – 1983
  • 6 Cyl 300 – 1984
  • 6 Cyl 300 – 1985
  • 6 Cyl 300 – 1986
  • 6 Cyl 300 – 1987

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.

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

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