Quicksilver 8M0099218 Complete Gearcase Assembly 20" Long Shaft 1.92:1 Ratio

The Quicksilver 8M0099218 is a genuine OEM complete gearcase housing assembly designed specifically for Mercury 150 HP 4-cylinder, 4-stroke outboard engines. This factory-original lower unit assembly provides reliable power transfer from the engine to the propeller, ensuring optimal marine performance and longevity.

Key Specifications:

• Gear ratio: 1.92:1 for balanced acceleration and top speed
• Shaft length: 20 inches (long shaft configuration)
• Pinion teeth: 13 teeth for precise power transfer
• Color: Black finish with corrosion-resistant coating
• Part number supersedes: 1600-8M0099218

Application:

• Fits Mercury 150 HP 4-cylinder, 4-stroke outboard motors
• Compatible with serial numbers 2B138363 and above
• Complete assembly—ready to install with all internal components

This is a complete gearcase assembly manufactured by Mercury Marine under the Quicksilver brand, ensuring factory-level precision and durability. The assembly includes all internal gears, bearings, seals, and housing components needed for a complete lower unit replacement. As a genuine Mercury Marine part, it meets stringent marine industry standards for saltwater and freshwater applications.