Quiz Task 1200 Engine Failure Analysis

A lawn tractor engine suddenly stops during operation. Consider factors such as fuel, air, and mechanical components. What could have caused the engine to stop?

• Lack of lubrication

• Clogged air filter

• Faulty spark plug

• All of the above

A compression tester is used for diagnosing ______?

• Fuel contamination

• Ignition timing issues

• Cylinder head gasket failure

• Carburetor malfunction

What key components should be regularly checked and maintained to prevent engine failure?

• Spark plug, air filter, and oil level

• Fuel tank, tires, and handle

• Blade sharpness, deck cleanliness, and wheel alignment

• Battery charge, seat condition, and paint job

A small engine is overheating. Which would be most effective in diagnosing the issue?

• Inspecting the cooling fins for debris

• Checking the oil level

• Examining the fuel quality

• Testing the spark plug gap

A small engine that fails to start. What steps should be taken?

• Check the fuel level, inspect the spark plug, and test the battery

• Replace the air filter, change the oil, and clean the carburetor

• Adjust the throttle, tighten the bolts, and lubricate the chain

• Refill the gas tank, replace the tires, and clean the exterior

Consider a small engine that is experiencing frequent stalling. Use strategic thinking to identify the most likely cause and propose a solution.

• Dirty air filter; clean or replace it

• Overfilled oil; drain excess oil

• Loose spark plug wire; tighten the connection

• Worn-out tires; replace them

Evaluate the role of a multimeter in diagnosing electrical issues in small engines. What specific problems can it help identify?

• Fuel line blockage

• Battery voltage and continuity issues

• Oil viscosity problems

• Air filter clogging

After mowing season is over, what should be done to ensure optimal performance next year?

• Clean the exterior and store in a dry place

• Change the oil, replace the spark plug, and clean the air filter

• Inflate the tires and check the seat condition

• Paint the exterior and polish the metal parts

A two stroke calls for 30:1 fuel mix in a backpack blower and the customer has been using 50:1. What are the potential consequences and how can they be prevented?

• Increased power output; use higher octane fuel

• Engine overheating; ensure correct oil-to-fuel ratio

• Reduced noise levels; use soundproofing materials

• Improved fuel efficiency; use ethanol-blended fuel

A small engine emits excessive smoke. What potential issues should be considered?

• Check the oil level and inspect the piston rings

• Examine the air filter and clean the carburetor

• Test the battery and inspect the wiring

• Inspect the tires and check the alignment