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Extension > Youth Development > Minnesota 4-H > Projects > Science, Engineering & Technology > Small Engines

Small Engines Project

Lawn mowers, go-karts and ATVs all run on small combustion engines. Learn about internal and external engine parts, tools, rules and regulations, safety issues, and career possibilities. Troubleshoot problems with a small engine, rebuild it and operate it safely.

Small Engines


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Minnesota State Fair

4-H plays a pivotal role in youth development and public education at the Minnesota State Fair. More than 7,000 4-H youth have the opportunity to interact with the public and educate fairgoers through 4-H exhibits, demonstrations, performances, and 4-H promotion. More info.

Project resources

Level 1 learning goals:

Identify engine parts and oil grade differences, demonstrate spark plug maintenance, understand the importance of safety labels and which machine to use for which job.

Level 2 learning goals:

Classify small engine types, identify internal parts of an engine, adjust a carburetor, calculate compression ratios, seasoning their engines, describe effects of changing gears and follow procedures for tearing down an engine.

Level 3 learning goals:

Tear down and rebuild an engine's air and fuel systems, electrical system and engine base. Sharpen a lawnmower blade, match engine sounds to problems and adjustments, use diagnostic tools and explain calculations and considerations in determining whether or not to start a small business.

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Project leader resources

Record keeping & evaluation

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