Sierra 18-8355 Marine Crankshaft Seal Kit

The Sierra 18-8355 Crankshaft Seal Kit is a quality aftermarket replacement seal kit designed for marine engines. Crankshaft seals serve a critical function — they prevent oil from leaking out of the engine at the crankshaft journal, maintaining proper lubrication and protecting internal engine components from contamination.

Sierra International is a trusted name in marine parts, supplying OEM engine manufacturers and boat builders with high-quality components. This crankshaft seal kit meets or exceeds the specifications of the original equipment parts it replaces, ensuring reliable performance in demanding marine environments.

Key Features:

• Meets or exceeds OEM specifications for fit, form, and function
• Engineered for the harsh marine environment
• Cross-references to multiple OEM part numbers for broad compatibility
• Sierra part number: 18-8355 (also listed as 118-8355)

OEM Cross-Reference Numbers:

• Chrysler / Force / US Marine: 25-45711, 25-F455305, 25-F455342
• MerCruiser / Mercury Marine: 25-47632, 25-864701
• OMC: 910582
• Johnson / Evinrude: 319662, 319664, 326649, 333096, 398051, 553127, 554545
• GLM: 81140, 81220, 81320, 87120
• Mallory: 9-76539, 9-76553

Replacing worn or leaking crankshaft seals at regular service intervals helps prevent oil loss, engine damage, and unexpected failures on the water. The Sierra 18-8355 provides a cost-effective solution that restores proper engine sealing without sacrificing quality.