Mercury 8M0142871 6-Jaw Sliding Gearcase Clutch

Mercury 8M0142871 6-Jaw Sliding Gearcase Clutch

Mercury 8M0142871 is the genuine OEM six-jaw sliding clutch used in the propeller shaft assembly of select Mercury and Mercury Racing outboard lower units. The clutch slides along the propeller shaft to engage the forward or reverse gear as the engine shifts.

Applications

Examples of gearcase configurations that list 8M0142871:

• Mercury 300 HP 4.6L V8 Pro XS and Verado: Select 5.44-inch torpedo gearcases with standard rotation.
• Mercury 225 HP 4.6L V8 Pro XS and 250 HP 4.6L V8 FourStroke: Select 5.44-inch torpedo gearcases with counter rotation.
• Mercury Racing 300R 4.6L V8 AMS: Select 5.44-inch torpedo and 1.60:1 Sport Master gearcases with standard rotation.
• Mercury Racing 450R 4.6L V8: Select 1.60:1 Sport Master gearcases with standard or counter rotation.
• Mercury 350 HP 2.6L L6 Pro Verado: Select 5.44-inch HD Sport Master gearcases with counter rotation. 

Confirm the engine serial number, gearcase model, gear ratio, and rotation. Match 8M0142871 in the parts diagram for the gearcase installed on your outboard before ordering.

Key Facts

• Brand: Mercury Marine
• Part number: 8M0142871 (catalog reference 52-8M0142871)
• Design: Six-jaw sliding clutch, also called a clutch dog
• Assembly: Gear housing and propeller shaft
• UPC: 745061174573

What’s Included

One Mercury 8M0142871 sliding clutch. The cross pin and retaining spring are separate service parts.

Shipping & Returns

Sold individually. See our Refund Policy for return details.

Service Notes

During gearcase service, inspect the mating gear dogs, cross pin, and retaining spring for wear. Follow the Mercury service manual for the specific lower unit and verify shift engagement before returning the outboard to service.