Lower Unit Gearcase Seal Kit for Johnson Evinrude 25 40 48 50 HP 18-2694, 433550

Lower Unit Gearcase Seal Kit for Johnson Evinrude

This lower unit gearcase seal kit is a direct replacement for Johnson Evinrude outboard motors of 25, 40, 48, and 50 HP, referencing OEM numbers 18-2694 and 433550.

Overview

This lower unit gearcase seal kit is designed for Johnson Evinrude outboards in the 25-50 HP range, providing all necessary seals and gaskets to stop gear oil leaks. The kit includes O-rings, shaft seals, and gaskets required for a complete lower unit rebuild. Ideal for DIY maintenance on older two-stroke Johnson and Evinrude motors.

Built For Performance

• Includes all seals needed for drive shaft, prop shaft, and shift shaft
• High-quality nitrile rubber resists oil and saltwater degradation
• Precision-molded seals for exact fit on Johnson Evinrude gearcases
• Cost-effective alternative to buying individual OEM seals
• Comes with illustrated installation guide (paper or digital)

Fits These Machines

• for Johnson Evinrude 25 HP outboards
• for Johnson Evinrude 40 HP outboards
• for Johnson Evinrude 48 HP outboards
• for Johnson Evinrude 50 HP outboards

On-The-Job Use

• Rebuilding lower unit after water intrusion or seal failure
• Preventive maintenance during off-season storage
• Replacing seals when changing gear oil or performing annual service
• Restoring older Johnson Evinrude outboards for fishing or recreation

Specs At A Glance

Good To Know

Q: Will this seal kit fit a 1985 Johnson 40 HP? A: Yes, it is designed to fit many 25-50 HP Johnson and Evinrude models from the 1970s through 1990s. Confirm your gearcase serial number for best fitment.

Q: Does the kit include the shift rod seal? A: Yes, the shift shaft seal is included along with all other critical seals for the gearcase.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.