About the 4-H Small Engine Project

Learn all about the design, operation, and troubleshooting of small internal combustion engines like those used in generators and lawn mowers! Dig into the function of different engine parts, compression ratios, and safety issues, and then learn how to tear down and rebuild a small engine.


Contact the Marion County 4-H office:


Small Engine Project Resources

You can learn more about small engines by completing one of the project activity guides, based on your grade level:

Project manuals may also be available to purchase at the Marion County Extension office, and older editions of manuals (if available) are free. Contact us to ask about availability!

Showcasing What You’ve Learned

You can create a project exhibit to showcase what you’ve learned while working on your project. Project exhibits are submitted for judging at the annual Marion County 4-H Showcase.

Exhibit Guidelines

Score Cards

Advancing to the State Fair

  • Yes! Small engine projects exhibits from 4-H members grades 3-12 are eligible to advance to the State Fair.

Cloverbuds (Grades K-2)


  • Show what you have learned about small engines by creating a poster, such as how to identify engine parts or helping an adult service an engine. A reference list must be included with your poster.
  • Cloverbud projects are for exhibition only (not judged), so there are no score cards, and exhibits are not eligible to advance to the State Fair.

More Small Engine Project Resources