Mercury 40-60 HP Command Thrust Long Complete Gearcase 8M0118591

Mercury Complete Gearcase 8M0118591 is a genuine Mercury OEM replacement lower unit for select 40-60 HP Command Thrust outboards. Mercury identifies this assembly as the Long, Generation 5 Command Thrust gearcase.

Compatible with select applications including:

• Mercury 40 HP Command Thrust
• Mercury 50 HP Command Thrust
• Mercury 60 HP Command Thrust
• Long-shaft configurations where 8M0118591 is specified

This is the complete gearcase assembly, rather than the basic, non-completed gearcase housing. The related basic gearcase assembly is sold separately as 8M0118594.

The Command Thrust gearcase uses a larger gearcase and propeller platform than the standard gearcase available on compatible horsepower models. Mercury also offers an X-Long Generation 5 Command Thrust version under part number 8M0118592, so shaft length and exact engine application should be confirmed before ordering.

To Confirm Compatibility: Contact our team with your engine serial number at (727) 596-5929 before ordering.