Lower Unit Seal Kit – Fits Johnson/Evinrude 85-140 HP V4 Outboards (Replaces 18-2692)
Lower Unit Seal Kit – Fits Johnson/Evinrude 85-140 HP V4 Outboards (Replaces 18-2692) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Lower Unit Seal Kit – Fits Johnson/Evinrude 85-140 HP V4 Outboards ...
Lower Unit Seal Kit – Fits Johnson/Evinrude 85-140 HP V4 Outboards (Replaces 18-2692) is backordered and will ship as soon as it is back in stock.
Product Details
This comprehensive Lower Unit Seal Kit is designed for Johnson/Evinrude 85-140 HP V4 outboard engines manufactured between 1973 and 1983. It provides all the essential seals and gaskets needed to service and reseal the lower unit gearcase, preventing water intrusion and oil leaks to restore optimal performance.
This kit directly replaces Sierra 18-2692, GLM 86712, Mallory 9-74113, and Soxa-Marine 18-2692, offering a reliable, direct-fit alternative to OEM parts.
- Installation: Suitable for both DIY mechanics and professional technicians.
- Complete Kit: Includes all necessary gaskets, O-rings, and oil seals for a full lower unit service.
- Durability: Made from high-quality rubber and synthetic materials to withstand the harsh marine environment.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Sierra | 18-2692 |
| GLM | 86712 |
| Mallory | 9-74113 |
| Soxa-Marine | 18-2692 |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
This seal kit is specifically for the Johnson/Evinrude outboard models listed.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | V4 | 85 | 2-Stroke | 1973–1980 | 18-2692 | |
| Johnson/Evinrude | V4 | 90 | 2-Stroke | 1981–1983 | 18-2692 | |
| Johnson/Evinrude | V4 | 100 | 2-Stroke | 1979–1980 | 18-2692 | |
| Johnson/Evinrude | V4 | 115 | 2-Stroke | 1973–1983 | 18-2692 | |
| Johnson/Evinrude | V4 | 135 | 2-Stroke | 1973–1976 | 18-2692 | |
| Johnson/Evinrude | V4 | 140 | 2-Stroke | 1977–1983 | 18-2692 |
Technical Specs
- Product Type
- Lower Unit Gearcase Seal Kit
- Installation
- DIY or Professional
- Components
- Gaskets, O-rings, Oil Seals, Washers
- Application
- V4 Outboard Gearcase
- Material
- Various (Rubber, Synthetic)
- Warranty
- 1 Year
- Package Dimensions
- 180mm × 150mm × 18mm (7.05" × 5.95" × 0.7")
- Weight
- 0.12 kg (0.26 lbs)
What’s in the Box
- 1 x Shift Housing Gasket (324670)
- 2 x Oil Seal (321453)
- 1 x Solenoid Cover Gasket (314876)
- 2 x Washer (311598)
- 4 x O-Ring (317178)
- 1 x O-Ring (322598)
- 1 x O-Ring (313446)
- 1 x O-Ring (314728)
- 1 x O-Ring (318372)
- 2 x Oil Seal (330137)
Installation Notes
- Safely secure the outboard engine and disconnect the battery. Drain the gearcase oil completely into a suitable container.
- Remove the propeller assembly, taking care to note the order of the thrust washer, spacer, and nut.
- Unbolt and carefully lower the gearcase assembly from the engine's midsection.
- Disassemble the gearcase, including the water pump and bearing carrier, laying out all parts in order on a clean surface.
- Carefully remove all old gaskets, seals, and O-rings. Thoroughly clean all mating surfaces, ensuring they are free of old adhesive, corrosion, and debris.
- Install the new seals and O-rings from the kit. Apply a thin layer of marine grease to the seals before installation to prevent damage.
- Reassemble the gearcase components, following the manufacturer’s service manual for correct sequence and torque specifications.
- Refill the gearcase with the recommended type and amount of fresh marine gear lube before reinstalling the propeller.
Troubleshooting & FAQ
How do I know if this seal kit will fit my engine?
This kit is specifically for Johnson/Evinrude 85-140 HP V4 outboards from 1973–1983. Please verify your engine's model, horsepower, and year against the compatibility chart on this page. Do not purchase if your model is not explicitly listed.
What are common signs of a failing lower unit seal?
The most common indicators are milky or creamy-looking gear oil (which signifies water intrusion) or a visible oil leak around the propeller shaft or drain screws. You may also notice a grinding noise or poor shifting performance.
How often should I replace my gearcase seals?
There is no fixed interval, but it is good practice to inspect for leaks every season. Seals should be replaced whenever the lower unit is serviced, if you notice any signs of water intrusion in the oil, or if the seals have become hard and brittle with age.
Does this kit include everything for a complete lower unit rebuild?
This is a seal kit, containing all necessary gaskets, O-rings, and oil seals. It does not include bearings, gears, or other internal hard parts. It is intended for resealing a mechanically sound gearcase.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
