Title: Replace oil seals.
Course: Small Engine Technology I (20110-I) > Section: Understanding Two-Stroke Operation Theory and Components

Replacement should include

- following manufacturer’s specifications and instructor’s guidelines
- determining appropriate gasket sealers, if needed
- using appropriate tools to install seals to prevent damage to sealing surface
- aligning gaskets before installing related parts.

Process/Skill Questions:

- Why are oil seals so important on a two-stroke engine?
- How does one test a crankcase for leaks?
- Why is a two-way seal used on the crankshaft of a two-stroke engine?