Servicing and Troubleshooting

Dirty or debris filled cylinder fins can cause which of the following?

• Dirty or debris filled cylinder fins can cause which of the following?

• Low heat transfer

• Lowered emissions

• Cold engine

A carburetor which is adjusted to lean may cause which of the following?

• Increased RPM

• Increased hydrocarbons

• Increased engine operating temperature

• Increased carbon monoxide

Which of the following is NOT an emission control part?

• Piston

• Ignition module

• Air filter

• Carburetor

Permeation requirements for the fuel tank, fuel feed lines and fuel cap gasket are designed to do which of the following?

• Reduce hydrocarbon (HC) emissions

• Eliminate fuel tank vent from the system

• Allow for less air to enter the carburetor

• Reduce oxides of nitrogen (NOX) emissions

Because of the complex nature of the system, which of the following requires very little maintenance?

• Carburetor

• Spark plug

• Fuel filter

• Electronic fuel injection

A spark plug with a white insulator and eroded electrode indicates which of the following?

• Lean running engine

• Cool running engine

• Improper air/fuel ratio

• Blocked cooling fins

On an engine equipped with a carburetor, a bog or hesitation when accelerating from low to high speed could indicate which of the following?

• High speed mixture is too rich

• Low speed mixture adjustment is too lean

• Insufficient engine warm-up

• Fuel hose damage

Which of the following could cause an engine to over-speed at full-throttle?

• Blocked muffler

• Leaking carburetor Welch plug

• Retarded ignition timing

• Restricted fuel filter

According to the presentation, which of the following should be completed first when inspecting the fuel system?

• Make sure the fuel filter is installed

• Inspect the fuel

• Check the fuel line for holes

• Verify the fuel tank vent is working properly

Which of the following would NOT cause engine vibration?

• Bent crankshaft

• Broken engine mounts

• Gear case issues

• Plugged air vent