Back to catalogue
Mercury & Mariner Starter Motors

Starter Motor for Mercury 40HP – 60HP

SKU: MXST-B168

$415.00
Out of stock Request a quote

The B168 is a 12-volt aftermarket replacement starter motor designed for selected 40HP to 60HP 4-stroke outboard engines. Featuring a 9-tooth drive gear, counterclockwise rotation and a 128mm motor casing, it provides reliable electric starting performance. Suitable for replacing worn, damaged or faulty original starter assemblies, this unit offers a practical replacement for compatible 4-cylinder outboards requiring the correct mounting and drive configuration.

Key benefits

Key Benefits

  • - 12V electric starter motor
  • - 9-tooth drive gear
  • - Counterclockwise (CCW) rotation
  • - 29mm drive gear diameter
  • - 128mm motor casing
  • - Suitable for selected 4-cylinder 4-stroke outboards
  • - Aftermarket replacement for original starter assemblies

Specifications & Dimensions

  • - Part Number: B168
  • - Product Type: Electric Starter Motor
  • - Voltage: 12V DC
  • - Drive Gear Teeth: 9
  • - Rotation Direction: Counterclockwise (CCW)
  • - Drive Gear Outside Diameter: 29mm (1.14")
  • - Motor Casing Length: 128mm (5.04")
  • - Starter Design: United Technologies-style
  • - Drive Gear Reference: 5008
  • - Engine Type: 4-Stroke
  • - Engine Configuration: 4-Cylinder

Compatible Outboard Motors

  • Mercury Outboards – 4-Cylinder, 4-Stroke
  • Selected models from 2001 onwards
  • - Mercury 40HP 4-Stroke
  • - Mercury 50HP 4-Stroke
  • - Mercury 60HP 4-Stroke
  • The supplier lists 40HP–60HP four-cylinder 4-stroke engines manufactured from 2001 onwards. Individual engine serial numbers and later model variations must be checked before ordering.

Cross-Reference / Replacement Part Numbers

  • Mercury OEM References
  • - 50-859377T
  • - 50-884044T
  • - 50-888161T
  • - 50-893888T

Signs the Starter Motor Needs Replacing

  • - Engine fails to crank despite a fully charged battery
  • - Clicking noise when turning the ignition key
  • - Slow or intermittent engine cranking
  • - Grinding or unusual noises during starting
  • - Excessive starter motor heat
  • - Worn or damaged starter drive gear
  • - Corroded electrical terminals or damaged starter housing

Important Fitment Information

  • - Confirm 12V electrical operation.
  • - Verify the 9-tooth drive gear and 29mm outside diameter.
  • - Confirm counterclockwise (CCW) rotation.
  • - Check the 128mm motor casing length.
  • - Compare the original starter against the listed OEM replacement numbers.
  • - Verify the engine model, production year and serial number.
  • - Confirm mounting configuration and electrical connections before installation.
  • - Not suitable for every 40HP–60HP outboard engine.

Shipping

Ships Australia-wide