Copyright Goodheart-Willcox Co., Inc.
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CHAPTER 9 Two-Stroke Engine Troubleshooting and Evaluation
Copyright Goodheart-Willcox Co., Inc.
8. A gray crust on the top of the piston indicates _____.
A. abrasive ingestion
B. normal engine running
C. excessive carbon buildup
D. the wrong oil was used in the premix
9. A dirty air filter element is okay _____.
A. if it allows the engine to run rich
B. if it is replaced after every five hours of use
C. if it is not dirty on the clean air side
D. if it allows only microscopic abrasives through
10. True or False? An engine can start and run when a spark test is
performed.