Mercury 500-600 HP V12 Silver Contra-Rotating Complete Gearcase 8M0174564

Mercury Silver Contra-Rotating Complete Gearcase 8M0174564 is a genuine Mercury OEM replacement gearcase assembly for select 7.6L V12 outboards. Mercury parts breakdowns identify 8M0174564 as the complete silver contra gearcase assembly.

Compatible with select applications including:

• Mercury 500 HP 7.6L V12 SeaPro
• Mercury 600 HP 7.6L V12 Verado
• Contra-rotating V12 gearcase applications where 8M0174564 is specified

The V12 gearcase system is designed specifically for Mercury's 500-600 HP 7.6L V12 platform. Parts breakdowns for both the 500 HP V12 SeaPro and 600 HP V12 Verado identify 8M0174564 as the complete gearcase.

This is the complete gearcase assembly, not the basic gearcase housing. The basic 500-600 HP housing is serviced separately as 8M0174565, while the internal shafts, bearings, seals, gears, and related components are also available individually.

Because of the different gearcase configurations used with Mercury V12 outboards, the engine serial number and original gearcase should be confirmed before ordering.

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