1. Small Engine Parts Identification Test

2. 1) ? -Holds the fuel for engine consumption
-Sometimes houses Carburetor
-Usually has a shut off valve
-Can house a screen that can become impermeable due to varnish or trash

3. 2) ? Separates debris from air taken in during operation
Does NOT separate water!
Affects engine performance & life
Most cost effective service part found on any engine
May use a pre-cleaner
Various shapes and sizes
Constructed of many different materials

4. 3) ? Mixes fuel with air to provide a combustible gas
Depending on specific application a carburetor may be Up-draft, Down-draft, or Side-draft
Can be found on fuel tank, but….
Will always be fixed to an intake manifold that is fixed to the cylinder head or block
May have multiple jets or “barrels” that regulate fuel consumption
Will have either manual or electric choke

5. 4) ?
Part of the ignition system that provides a “spark” to ignite fuel/air mixture during powerstroke
Commonly misunderstood and misdiagnosed part
Comes in many lengths and heat ranges
Not all spark plugs are created equal

6. 5) ? Induces an electric current when rotated around a magnetic field
Always mounted in respect to flywheel location
Common ignition source of choice for newer carbureted engines
Replaced breaker points ignition

7. 6) ?
Volume of the cylinder above the piston in which combustion takes place
Located mainly in the cylinder head

8. 7) ?
Shaft containing lobe (cams) that open and close valves as the shaft rotates
Controls engine timing (advance, Retard)
Rotates in conjunction with the crankshaft

9. 8) ? Rod that connects the piston to the crankshaft
Large end – crank end (end w/bolts)
Small end – piston end
Attaches to piston via the wristpin

10. 9) ? Housing for the crank, cam, etc. Base of the engine
Contains engine oil
Seal housing

11. 10) ? Main shaft of the engine
Provides the reciprocating motion of the piston
Outputs rotary motion to be used to do work (ie. Turn pulleys, blades, etc.)

12. 11) ? The bore in which the piston rides
Usually made into the crankcase
Generally the largest engine component

13. 12) ?
Detachable portion of the engine that houses the combustion chamber
Can house valve components (OHV engines)
Always houses spark plug(s)

14. 13) ?
Valve that permits exhaust to leave combustion chamber on exhaust stroke
Always the smaller of the two valves (int, ex)

15. 14) ?
Valve that permits air/fuel mixture to enter the combustion chamber on intake stroke
Always the larger of the two valves (int.,ex)

16. 15) ?
Cylindrical part with closed surface area on one end connected to the crankshaft via the connecting rod
Forces fuel/air mixture into combustion chamber
Exerts force back down to the crankshaft

17. 16) ? Part of the piston above the rings
Can be flat , domed , or dished

18. 17) ?
Expanding rings placed in the grooves of pistons to create a seal that keeps oil down and the fuel/air mixture up
Never align the open ends when installing rings
Ring types- compression &
oil

19. 18) ?
Wheel bolted to one end of the crankshaft that maintains the speed of the engine during operation
Sometimes used for engine balance
Either used on work-end of the crankshaft or the free-end

20. 19) ? Used to keep the flywheel in place
Also used as a breaker point in some ignition systems

21. 20) ? Used for both filling & checking engine oil
Always locate this plug before doing anything to any engine
Service life begins Here!