Quicksilver 878408A 1 Power Trim O-Ring Repair Kit for Mercury Outboards

The Quicksilver 878408A 1 is a genuine OEM Power Trim Repair Kit designed to restore proper hydraulic function to Mercury and Mariner outboard power trim and tilt systems. This kit addresses common trim system failures caused by worn or degraded seals and O-rings, including hydraulic fluid leaks and loss of trim pressure.

As an authentic Quicksilver factory part, this kit is manufactured to the same specifications as the original components, ensuring a precise fit and reliable performance. It includes the seals and O-rings necessary to rebuild the power trim cylinder assembly on a wide range of Mercury and Mariner outboard engines.

Key Features:

• Genuine Quicksilver OEM factory replacement kit — not aftermarket
• Includes seals and O-rings required to rebuild the power trim/tilt cylinder
• Restores hydraulic integrity and stops trim fluid leaks
• Engineered to exact Mercury Marine factory specifications
• Compatible with Mercury and Mariner outboard engines ranging from 135–300 HP (2.5L and 3.0L), including DFI and select Verado models
• Sold as a single kit (Quantity = 1)

OEM / Cross-Reference Part Numbers: 878408A1, 878408A 1

This repair kit is the correct OEM solution for restoring a leaking or non-functioning power trim system. Typical repair time ranges from one to four hours depending on experience level.