Sierra 18-2656 Lower Unit Seal Kit, Replaces OMC 396350, for Johnson/Evinrude Outboard Motor

The Sierra 18-2656 Lower Unit Seal Kit is a gear housing reseal kit built for Johnson/Evinrude outboard motors, engineered to meet or exceed original equipment quality. The kit contains the oil seals needed to reseal the lower unit gear case, helping keep gear lube inside and water out during service or after a lower unit rebuild. It is designed as a direct equivalent to the original equipment part it replaces, so installation and fit match the OEM component it is servicing.

Inside the kit are two individual oil seals: part 18-2025 (O.E. 318971) and part 18-2028 (O.E. 321480), covering the seal points typically required for a complete lower unit reseal on applicable Johnson/Evinrude outboards. The kit is finished in white and uses aluminum in its construction. This is a service kit intended for technicians and DIY boat owners performing lower unit maintenance, gear seal replacement, or a full lower unit teardown and rebuild.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2656
• Product Type: Lower Unit Seal Kit
• Kit Contents: Oil Seal 18-2025 (O.E. 318971), Oil Seal 18-2028 (O.E. 321480)
• Color: White
• Material: Aluminum
• Weight: 0.11 pounds
• UPC: 030999312679
• Recommended Use: Seal kit for Johnson/Evinrude outboard motor

Fitment

• Johnson/Evinrude outboard motors

Replaces (OEM)

• 396350

Frequently Asked Questions

What does the Sierra 18-2656 Lower Unit Seal Kit fit? The Sierra 18-2656 is a lower unit seal kit designed for Johnson/Evinrude outboard motors.

What OEM part number does the 18-2656 replace? The 18-2656 kit replaces OEM number 396350 on applicable Johnson/Evinrude outboards.

What is included in the 18-2656 kit? The kit contains two oil seals: part 18-2025 (O.E. 318971) and part 18-2028 (O.E. 321480).

Is the Sierra 18-2656 an aftermarket or genuine OEM part? It is an aftermarket seal kit, built to meet or exceed the quality of the original equipment seal kit it replaces.

What material are the seals made of? The 18-2656 kit uses aluminum in its construction.

How much does the 18-2656 seal kit weigh? The Sierra 18-2656 Lower Unit Seal Kit weighs 0.11 pounds.

What color is the Sierra 18-2656 kit? The kit is finished in white.

When would I need this seal kit? This kit is used when resealing the lower unit gear case during service, gear seal replacement, or a full lower unit rebuild on a Johnson/Evinrude outboard.

Are there other seal kits that cross to the same OEM number? Yes, the 18-2656 is cross-referenced to the same OEM 396350 seal application as GLM 87602 and Mallory 9-74100.

What is the UPC for the Sierra 18-2656? The UPC for the Sierra 18-2656 Lower Unit Seal Kit is 030999312679.

Does the 18-2656 kit include installation hardware or gaskets? The kit includes the two oil seals (18-2025 and 18-2028); no additional hardware is listed as included.

Is this kit specific to one lower unit or a range of models? The 18-2656 is a Johnson/Evinrude outboard lower unit seal kit; confirm your outboard's gear housing uses OEM seal 396350 before ordering.