SKU: 29667436710

396350 18-2656 Lower Unit Gearcase Seal O-ring Kit for Johnson Evinrude | JLM Marine

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Description

396350 18-2656 Lower Unit Gearcase Seal O-ring Kit for Johnson Evinrude | JLM MarineLower Unit Gearcase Seal O ring Kit 396350 Fits Johnson Evinrude 815 HP Outboards This Lower Unit Gearcase Seal O ring Kit is engineered to fit Johnson Evinrude 8, 9. 9, 10, and 15 HP outboard motors, covering both 2 stroke models (19742007) and 4 stroke models (19952004). It provides a complete seal solution for lower unit gearcase maintenance and rebuild applications. Direct Replacements: OMC 396350 0396350, Sierra 18 2656, and 26 00077. This kit

Lower Unit Gearcase Seal O-ring Kit 396350 – Fits Johnson Evinrude 8–15 HP Outboards

This Lower Unit Gearcase Seal O-ring Kit is engineered to fit Johnson Evinrude 8, 9.9, 10, and 15 HP outboard motors, covering both 2-stroke models (1974–2007) and 4-stroke models (1995–2004). It provides a complete seal solution for lower unit gearcase maintenance and rebuild applications.

Direct Replacements: OMC 396350 / 0396350, Sierra 18-2656, and 26-00077. This kit consolidates all essential seals and O-rings required for lower gearcase service in one package.

  • Complete seal kit for lower unit gearcase rebuild
  • Covers both 2-stroke and 4-stroke Johnson Evinrude engines
  • All components shown in product image included

Part Number Cross-Reference

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

Brand Part Number
OMC 396350, 0396350
Sierra 18-2656
Aftermarket 26-00077

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.

Brand Rated HP Stroke Years
Johnson Evinrude 9.9, 10, 15 HP 2 Stroke 1974–2007
Johnson Evinrude 8, 10, 15 HP 4 Stroke 1995–2004

Technical Specifications

Specification Value
OEM Part Number 396350, 0396350
Aftermarket Part Number 18-2656, 26-00077
Application Lower Unit Gearcase Seal Kit
Compatible Brand Johnson Evinrude

Package Contents

This kit includes:

  • 1 × Lower Gearcase Seal Kit

Note: The package contains all the seals and O-rings shown in the product image.

Installation Guide

  1. Disconnect the lower unit from the outboard motor and drain all gearcase oil. Clean the exterior thoroughly to prevent contamination during disassembly.
  2. Remove the propeller, shear pin, and any external hardware securing the lower unit housing. Mark the orientation of mating surfaces for reassembly.
  3. Carefully disassemble the gearcase, noting the position of shims and thrust washers. Inspect all internal components for wear or damage.
  4. Remove all old seals and O-rings from the gearcase housing using appropriate seal removal tools. Clean all sealing surfaces with solvent and inspect for scoring or corrosion.
  5. Lubricate new seals and O-rings with marine-grade grease before installation. Install each seal square to its bore, ensuring proper orientation and seating depth.
  6. Reassemble the gearcase components in reverse order, replacing shims and washers in their original positions. Torque all fasteners to manufacturer specifications.
  7. Refill the gearcase with the correct type and quantity of gear oil through the lower fill plug. Monitor for air bubbles and ensure oil reaches the upper vent hole.
  8. Reinstall the lower unit onto the outboard motor, aligning the driveshaft and water tube carefully. Secure all mounting hardware and torque to specification.
  9. Run the engine in a test tank or on the water, checking for leaks around all seal points. Monitor gearcase temperature and shift operation for proper function.

Troubleshooting & FAQ

Q: How do I confirm this seal kit fits my specific Johnson or Evinrude engine?
A: Check the compatibility table above for your engine's HP rating, stroke type, and year range. Cross-reference your current part number (396350, 0396350, 18-2656, or 26-00077) to ensure proper fitment before ordering.

Q: How often should I replace the lower unit seals?
A: Replace lower unit seals during gearcase rebuilds or whenever you notice gear oil leaking, milky oil (indicating water intrusion), or during routine maintenance every 3–5 years depending on usage and operating conditions.

Q: What are the signs that my lower unit seals are failing?
A: Common symptoms include visible gear oil leaks around the lower unit, milky or contaminated gear oil, difficulty shifting gears, unusual noise from the gearcase, or overheating during operation.

Q: Can I reuse the old seals if they look okay?
A: No, always replace all seals and O-rings during gearcase service. Even if they appear intact, seals lose elasticity over time and may fail shortly after reassembly, leading to costly water damage or gear failure.

Q: What's the difference between this kit and the OEM Johnson/Evinrude kit?
A: This is an aftermarket replacement part built to OEM specifications using comparable materials. It provides the same seal function and fitment as the original OMC kit at a more competitive price point.

Q: Is this an OEM or aftermarket part?
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.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 29667436710

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4.1 ★★★★★
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Chris snyder
Whiting, US
★★★★★ 3
Nice looking. Not very sturdy. Easy to install.
Size: 40x7 2Pcs, Color: White, Size: 40x7 2Pcs, Color: White
Update: The shelf slopes at about a 45° angle when you put anything more than about a pound on the outside edge of it. Perfectly fine up against the wall. Just seems like the braces inside aren't long enough to really give the stability needed. Bracket is nice and tight against the wall. Had to add braces underneath to hold a small plant, a photo and a small container. Wa sloping more and more each week The shelves look great and we're pretty easy to install. They have a single bracket that is very easy to mount to the wall and get nice and level.. The downside is that the bracket isn't long enough to go between studs. This seems like a pretty simple oversight. I mean why wouldn't you make it long enough to go stud to stud? Secondly and maybe more fatally the bars that go inside the shelf to support them coming out from the wall are significantly shorter than the depth of the shelf. Unfortunately this means the shelf is only supported the first few inches coming out from the wall so there is the potential for a slight lean forward.. The anchors they send are trash. Cheap soft plastic that just tears and bends with a screwdriver. I would suggest spending $2 and grabbing your own anchors from Ace or home Depot. The shelves are essentially made of a high grade cardboard kind of wood. They are not going to support much weight or last for years and years however there incredibly affordable and look nice and easy to install. Long as your expectations are right you'll be happy.
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Reviewed in the United States on October 23, 2023
J
Verified Purchase
Janice Amidon
Los Angeles, US
★★★★★ 5
Great product.
Size: 24x6 2Pcs, Color: Black
Very good sturdy item
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Reviewed in the United States on June 1, 2026
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Verified Purchase
Chris
Chelsea, US
★★★★★ 5
Looks Great with a Couple of Modifications
Turned out nice. I would say for the price, it's great quality and took about 45 mins to assemble, but I was also taking my time and using a screw gun. I wouldn't assemble everything by hand. Maybe to get the machined screws started by hand but everything else use a screw gun or drill. 1 thing to look out for: The light strip has a piece of it's stickers that is longer on the one end. I think that's so you can move the light strip over and then the end with the cord on it can be routed threw the top of the wooden side panel, then down on the outside of the shelf. As you can see in my video, I had to route it down on the inside of the shelf because the part that connects the power cord to the led strip landed right where 2 wood panels need to be screwed together. This might seem confusing in this review, but lay down the light strip 1st and then you might understand what I mean. The way mine turned out is still OK, but as you can see the power button control has to be mounted on the inside and you'll see it. Not a big deal for me, but that's not the way I wanted it to begin with. Also, I hated that the cord was white. I just put a couple coats of black spray paint and it looks a lot better.
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Reviewed in the United States on September 24, 2025
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Billy Avina
Massapequa, US
★★★★★ 5
Just get it don't hesitate
Size: 8.6"D x 23.6"W x 33.8"H, Color: Black
It's really nice and bold looking
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Reviewed in the United States on April 25, 2026
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Verified Purchase
C.Ray
Belleville, US
★★★★★ 5
Excellent value.
The instructions were pretty easy to follow. I appreciate that there was an extra screw of each size provided, just in case. I wish there had been clearer indications on how to handle the cord or the included light. I ran it down the inside and mounted the switch on the inside of the display shelf. I bought the white variant; however, beacause I am not fond of black furniture and tend towards bright colors, I used blue spray paint to cover the black metal and make the piece better fit my decor. A white with white option would have been ideal, but now I have a unique piece so it all works out. The value for the price is excellent. It is a large, sturdy piece that should prove functional for years to come. I am considering purchasing a second one for my husband's gaming space.
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Reviewed in the United States on August 23, 2025

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