Small Engine Parts Identification Test

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

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

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

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

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

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

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

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

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

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.)

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

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

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

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

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

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

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

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

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

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