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PowerPoint ® Presentation Chapter 6 Basic Small Engine Maintenance and Repair Projects.

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Presentation on theme: "PowerPoint ® Presentation Chapter 6 Basic Small Engine Maintenance and Repair Projects."— Presentation transcript:

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2 PowerPoint ® Presentation Chapter 6 Basic Small Engine Maintenance and Repair Projects

3 Chapter 6 Basic Small Engine Maintenance and Repair Projects Engine oil used in small engines should be changed every 25 hr of operation or once per season.

4 Chapter 6 Basic Small Engine Maintenance and Repair Projects

5 Used oil and soiled rags should be disposed of in accordance to local environmental statutes.

6 Chapter 6 Basic Small Engine Maintenance and Repair Projects Several different steps are required to properly remove debris from a small engine.

7 Chapter 6 Basic Small Engine Maintenance and Repair Projects Accumulated grease can be removed from OPE by using a degreasing agent and a pressurized water hose.

8 Chapter 6 Basic Small Engine Maintenance and Repair Projects A spark plug gauge is used to adjust and measure the gap between two electrodes at the tip of a spark plug.

9 Chapter 6 Basic Small Engine Maintenance and Repair Projects A spark tester is used to test the ignition system of a small engine.

10 Chapter 6 Basic Small Engine Maintenance and Repair Projects A visible spark is present in the window of the tester when the ignition system is functioning properly.

11 Chapter 6 Basic Small Engine Maintenance and Repair Projects A spark plug is tested for spark miss after the ignition system proves to function properly.

12 Chapter 6 Basic Small Engine Maintenance and Repair Projects Dual-element air cleaners are available in a variety of designs.

13 Chapter 6 Basic Small Engine Maintenance and Repair Projects An attachment screw must be loosened to remove the air cleaner assembly cover on most small engines.

14 Chapter 6 Basic Small Engine Maintenance and Repair Projects Foam air-cleaner elements must be saturated with engine oil prior to installation.

15 Chapter 6 Basic Small Engine Maintenance and Repair Projects Dual-element air cleaners contain foam precleaner and a pleated paper element.

16 Chapter 6 Basic Small Engine Maintenance and Repair Projects Many precleaners have installation instructions printed directly on the surface.

17 Chapter 6 Basic Small Engine Maintenance and Repair Projects Air-cleaner cartridge housings should be cleaned with a clean, dry cloth instead of solvents or compressed air.

18 Chapter 6 Basic Small Engine Maintenance and Repair Projects A muffler that is attached to an engine with bolts can be removed by loosening the bolts with a socket wrench.

19 Chapter 6 Basic Small Engine Maintenance and Repair Projects A muffler that is screwed directly into an exhaust port should have penetrating oil applied to the screw threads prior to removal.

20 Chapter 6 Basic Small Engine Maintenance and Repair Projects A threaded muffler can be removed by grasping with slip- joint pliers and rotating counterclockwise.

21 Chapter 6 Basic Small Engine Maintenance and Repair Projects Hard soot accumulation in a muffler can be removed by tapping the muffler body with a rubber mallet or on a hard surface.

22 Chapter 6 Basic Small Engine Maintenance and Repair Projects Some lawn and garden tractors are equipped with mower decks that can be easily removed or installed using a quick-disconnect mechanism.

23 Chapter 6 Basic Small Engine Maintenance and Repair Projects Shear pins are designed to reduce component damage by fracturing when the driven member of a rigid system requires more power than a disc or coupling is able to provide.

24 Chapter 6 Basic Small Engine Maintenance and Repair Projects Two-stage snow throwers typically have skid shoes to help provide smooth movement of the snow thrower along uneven surfaces.

25 Chapter 6 Basic Small Engine Maintenance and Repair Projects Testing engine compression verifies the maximum power output of each piston stroke.

26 Chapter 6 Basic Small Engine Maintenance and Repair Projects Testing a crankcase breather ensures that crankcase gases are properly vented.

27 Chapter 6 Basic Small Engine Maintenance and Repair Projects When preparing a lawn mower engine for long-term storage, the moving components should be lubricated lightly with spray lubricant. Each lubricated component should then be actuated to spread the lubricant evenly into the moving parts.

28 Chapter 6 Basic Small Engine Maintenance and Repair Projects Prior to long-term storage, the belt drive systems of mower deck blades should be examined for worn, scorched, or misaligned belts.

29 Chapter 6 Basic Small Engine Maintenance and Repair Projects There is often an idler pulley connected with linkage to the clutch pedal of ride-on lawn mowers.


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