Mercury SeaPro Command Thrust Counter-Rotation Complete Gearcase 8M0099917

Mercury Complete Gearcase 8M0099917 is a genuine Mercury OEM replacement lower unit for select Mercury EFI SeaPro FourStroke outboards. This SeaPro-specific assembly features a 2.38:1 Command Thrust gearcase with counter rotation for compatible multi-engine installations.

Compatible with select SeaPro applications including:

• Mercury 75 HP EFI SeaPro
• Mercury 90 HP EFI SeaPro
• Mercury 115 HP EFI SeaPro

This is a complete gearcase assembly, rather than the basic empty gear housing. Mercury parts breakdowns list 8M0099907 as the corresponding basic SeaPro gear housing.

The CXL configuration uses a counter-rotation gearset and left-hand propeller shaft. This gearcase is part of Mercury's 2.38:1 Command Thrust family and is specifically configured for SeaPro applications.

Specifications

Part Number: 8M0099917
Type: Complete Gearcase Assembly
Application: SeaPro
Gearcase: Command Thrust
Gear Ratio: 2.38:1
Rotation: Counter-Rotation
Configuration: CXL
Basic Gear Housing: 8M0099907

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