Lower Unit Seal Kit – Fits Johnson Evinrude 85-140 HP V4 (Replaces 18-2692)
Lower Unit Seal Kit – Fits Johnson Evinrude 85-140 HP V4 (Replaces 18-2692) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Lower Unit Seal Kit – Fits Johnson Evinrude 85-140 HP V4 (Replaces 18-2692) is backordered and will ship as soon as it is back in stock.
Product Details
This Lower Unit Seal Kit – Fits Johnson Evinrude 85-140 HP V4 (Replaces 18-2692) is designed to restore the gearcase integrity of Johnson and Evinrude 85–140 HP V4 outboard engines from 1973–1983. It provides all necessary seals and gaskets to prevent water intrusion and oil leaks, ensuring reliable performance.
This kit is a direct interchange for several part numbers, including Sierra 18-2692, GLM 86712, Mallory 9-74113, and others, offering a dependable alternative to OEM components.
- Engineered for direct OEM-level replacement.
- Specifically designed for V4 engine applications.
- Includes a comprehensive set of gaskets, seals, and O-rings for a complete overhaul.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Sierra | 18-2692 |
| GLM | 86712 |
| Mallory | 9-74113 |
| SeaSierra | 18-2692 |
| QuickMarine | 18-2692 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for the following Johnson and Evinrude models.
| Brand | Model | Rated HP | Years |
|---|---|---|---|
| Johnson/Evinrude | V4 | 85 | 1973–1980 |
| Johnson/Evinrude | V4 | 90 | 1981–1983 |
| Johnson/Evinrude | V4 | 100 | 1979–1980 |
| Johnson/Evinrude | V4 | 115 | 1975, 1977, 1980–1983 |
| Johnson/Evinrude | V4 | 135 | 1973–1976 |
| Johnson/Evinrude | V4 | 140 | 1977–1983 |
Technical Specs
- Product Type
- Lower Unit Gearcase Seal Kit
- Installation
- Direct OEM replacement
- Housing Color
- Black/Gray
- Warranty
- 30 days (HARVARD MARINE)
- Other Technical Attributes
- V4 engine applications
What’s in the Box
- 1 x Shift Housing Gasket (0352165/324670)
- 1 x Solenoid Cover Gasket (314876)
- 2 x Oil Seal (0330137)
- 2 x Oil Seal (0321453)
- 2 x Drain/Fill Plug Washer (0311598)
- 4 x O-Ring (0317178)
- 1 x O-Ring (0307853/322598)
- 1 x O-Ring (0313446)
- 1 x O-Ring (0354731/314728)
- 1 x O-Ring (0318372)
- 1 x O-Ring (0302493)
Installation Notes
- Disconnect the battery and shift linkage. Place a drain pan under the lower unit.
- Remove the drain/fill plugs to drain the gearcase oil completely. Inspect the oil for metal shavings or a milky appearance, which indicates water intrusion.
- Unbolt and carefully lower the gearcase from the engine midsection.
- Disassemble the lower unit to access the seals, including the driveshaft and propshaft seals. Keep parts organized.
- Remove all old seals, O-rings, and gaskets. Thoroughly clean all mating surfaces and seal bores, ensuring they are free of old adhesive or corrosion.
- Carefully install the new seals and O-rings from the kit. Use a proper seal driver or socket to press them in squarely without damage. Lightly lubricate seals with marine grease.
- Reassemble the gearcase, torquing bolts to the manufacturer's specifications.
- Reinstall the lower unit, ensuring the driveshaft, water tube, and shift shaft align correctly.
- Refill the gearcase with fresh, high-quality marine gear lubricant according to your engine's manual.
- After running the engine, re-check for any oil or water leaks around the sealed areas.
Troubleshooting & FAQ
How do I confirm this kit fits my specific engine?
Verify your engine's brand (Johnson/Evinrude), model (V4), horsepower rating, and year of manufacture against the Engine & Model Compatibility table. This kit is specifically for 85–140 HP V4 models made between 1973 and 1983.
What are the signs that my lower unit seals are failing?
Common signs include milky or creamy gear oil (indicating water intrusion), visible oil leaks around the propeller shaft or driveshaft, or metal shavings on the magnetic drain plug. These symptoms suggest a breach in the seals that requires immediate attention.
Is this kit for 2-stroke or 4-stroke engines?
This kit is designed for the V4 engine models produced in the specified year range, which are 2-stroke outboards. Always confirm your engine's specifications before ordering.
How often should lower unit seals be replaced?
It is good practice to inspect your gear lube annually and replace the seals whenever you notice signs of leakage or water contamination. Many technicians recommend replacing lower unit seals every 3-5 years as preventative maintenance, or whenever the water pump is serviced.
Are any special tools required for installation?
Installation requires standard mechanical tools, a torque wrench, and potentially a seal puller and seal driver set for proper removal and installation of the oil seals without damaging the gearcase housing.
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.
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