Mercury 150 HP SeaPro Basic Gearcase Housing 8M0190046

Mercury Basic Gearcase Housing 8M0190046 is a genuine Mercury OEM replacement gearcase housing for select 150 HP EFI SeaPro FourStroke outboards. It serves as the main housing for the internal gears, shafts, bearings, seals, and related lower-unit components.

Compatible with select applications including:

• Mercury 150 HP EFI SeaPro FourStroke
• Standard-rotation SeaPro gearcase configurations
• Counter-rotation SeaPro gearcase configurations
• Long and X-Long configurations where 8M0190046 is specified

The same basic housing is shown in Mercury parts breakdowns for both standard and counter-rotation 150 HP SeaPro gearcases.

This is the basic gearcase housing, not a complete lower unit. Internal components such as the propeller shaft, gears, bearings, carrier, shift components, seals, and other gearcase hardware are serviced separately.

Complete 150 HP SeaPro gearcases use different part numbers depending on shaft length and rotation, so 8M0190046 should not be confused with a ready-to-install complete gearcase assembly. Current complete SeaPro gearcases include separate Long, X-Long, and counter-rotation configurations.

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