18-2692 Gearcase Lower Unit Seal Kit for Johnson Evinrude V4 Crossflow | JLM Marine

18-2692 Gearcase Lower Unit Seal Kit for Johnson Evinrude V4 Crossflow

This gearcase lower unit seal kit is designed for Johnson/Evinrude V4 Crossflow outboards rated 85–140 HP manufactured between 1973 and 1983. It provides a complete sealing solution for your lower gearcase, ensuring reliable performance and protection against water intrusion.

This kit serves as a direct replacement for OEM part number 18-2692, delivering the seals, o-rings, and gaskets needed for a professional lower unit reseal.

• Complete seal kit with all necessary components for lower gearcase service
• Fits Johnson/Evinrude 85, 90, 100, 110, 115, 135, and 140 HP engines (1973–1983)
• Engineered specifically for V4 Crossflow engine configurations

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here's a guide to help you identify your engine's serial/model: Johnson/Evinrude Serial Number Guide.

Technical Specifications

Package Contents

This seal kit includes:

• 1 × Complete Lower Unit Gearcase Seal Kit
• All seals, o-rings, and gaskets shown in the product images

Installation Guide

1. Disconnect the battery and remove the propeller from the lower unit. Drain all gearcase oil completely.
2. Detach the lower unit from the mid-section following your service manual's torque sequence. Support the unit securely.
3. Disassemble the gearcase, removing the water pump, drive shaft, and propeller shaft. Keep all hardware organized.
4. Remove all old seals, o-rings, and gaskets from the housing and shafts. Clean all mating surfaces thoroughly with a suitable solvent.
5. Inspect all seal grooves and bearing surfaces for damage, corrosion, or wear. Replace any worn components as needed.
6. Lubricate new seals lightly with marine grease. Install each seal in the correct orientation, ensuring lips face the proper direction.
7. Reassemble the propeller shaft, drive shaft, and bearing carrier, using new gaskets and o-rings from the kit. Torque fasteners to specification.
8. Reinstall the water pump housing with a new gasket. Align the drive shaft splines carefully.
9. Mate the lower unit to the mid-section, ensuring the water tube seats properly. Tighten mounting bolts to the specified torque in a cross pattern.
10. Refill the gearcase with the correct grade and quantity of gear oil. Check for leaks at the fill and vent plugs.
11. Reinstall the propeller with a new cotter pin or locking hardware. Reconnect the battery.
12. Test-run the engine in a test tank or on the water, monitoring for leaks or unusual noise. Recheck oil level after initial run.

Troubleshooting & FAQ

Q: How do I confirm this seal kit fits my specific engine?
A: Cross-reference your engine's horsepower, year, and model designation with the compatibility table above. This kit is designed exclusively for Johnson/Evinrude V4 Crossflow engines (85–140 HP, 1973–1983). Verify your engine configuration before ordering.

Q: What are the signs that my lower unit seals need replacement?
A: Common symptoms include milky or contaminated gear oil (indicating water intrusion), oil leaking from the propeller shaft or lower unit seams, unusual noise during operation, or difficulty shifting gears. Inspect seals during routine maintenance intervals.

Q: How often should I replace the lower unit seals?
A: Replace seals any time you service the lower unit, experience leaks, or notice water contamination in the gear oil. As preventive maintenance, inspect seals annually or every 100 hours of operation, whichever comes first.

Q: Can I reuse any of the old seals or gaskets?
A: No. Always replace all seals, o-rings, and gaskets during lower unit service to ensure a proper seal and prevent future leaks. Reusing old components can lead to premature failure and water damage.

Q: What's the difference between OEM and aftermarket seal kits?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.