Description
SIERRA Johnson / Evinrude 5.5 / 6 / 7.5 HP Lower Unit Seal Kit – 18-2679
Sierra 18-2679 is a Lower unit seal kit engineered for the specified marine application. Selected Johnson/Evinrude 5.5, 6 and 7.5 HP gearcases from 1955-1967 as identified in the Sierra application chart, with suffix-specific exceptions.
- Lower-unit seal kit for classic small Johnson/Evinrude outboards.
- Application chart includes 5.5, 6 and 7.5 HP models in the 1955-1967 range.
- Contains bearing-housing gasket, oil seals, O-rings, washers and spaghetti seal components.
- Intended for complete gearcase resealing rather than replacement of a single external seal.
- Confirm model number/year suffix because late-1960s 6 HP variants transition to different Sierra kits.
For marine drive and engine service parts, fitment can vary by model, serial number, gear ratio, casting and prior service history. Compare the original OEM number and physical configuration before installation, and replace related seals, bearings, locking hardware, hoses or cable components when their condition requires it.
Specifications
- Manufacturer: Sierra
- Part Number: 18-2679
- Part Type: Lower unit seal kit
- Application: Selected Johnson/Evinrude 5.5, 6 and 7.5 HP gearcases from 1955-1967 as identified in the Sierra application chart, with suffix-specific exceptions.
- Horsepower: 5.5 / 6 / 7.5 HP
- Era: 1955-1967 applications

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