Description
SIERRA Mercury / Yamaha Gearcase Drain-Fill Washer, Replaces 27-81987M – 18-4698
Sierra 18-4698 is a gearcase drain/fill screw washer for Mercury/MerCruiser and Yamaha lower-unit gear-oil drain/fill screws using washer 27-81987M / Yamaha 90430-08020-00.
- Replacement sealing washer for lower-unit gearcase drain and fill screws.
- Cross-references Mercury/MerCruiser 27-81987 / 27-81987M and Yamaha 90430-08020-00.
- Replace the washer at gear-oil service if compressed, cut or hardened and inspect drained lubricant for water contamination or metal debris.
- Designed as a direct marine-service replacement where the listed Sierra/OEM reference is specified.
- Compare the original part number, dimensions and assembly configuration before installation.
Fitment for marine engine and drive service parts can vary by model, serial number, drive/gearcase, cooling configuration and prior OEM supersessions. Compare the original OEM number and physical configuration before installation, and follow the applicable manufacturer service procedure and torque specifications.
Specifications
- Manufacturer: Sierra
- Part Number: 18-4698
- Part Type: Gearcase drain/fill screw washer
- Application: Mercury/MerCruiser and Yamaha lower-unit gear-oil drain/fill screws using washer 27-81987M / Yamaha 90430-08020-00.
- Function: Gearcase drain/fill screw sealing washer
Interchange / OEM References
- Mercury/MerCruiser: 27-81987, 27-81987M
- Yamaha: 90430-08020-00
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