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Four- Stroke Small Engines

Four- Stroke Small Engines. Transportation Mr. O. Components. Recoil Start- Pull start system, connects to flywheel/crankshaft. Flywheel - Large wheel mounted to crankshaft, stores momentum to keep engine running. Contains magneto. Components (cont’d).

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Four- Stroke Small Engines

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  1. Four- Stroke Small Engines Transportation Mr. O

  2. Components • Recoil Start- Pull start system, connects to flywheel/crankshaft. • Flywheel- Large wheel mounted to crankshaft, stores momentum to keep engine running. Contains magneto

  3. Components (cont’d) • Crankshaft- Transfers piston motion into rotation. Used as engine output.

  4. Components (cont’d) • Piston-creates combustion Inside chamber. • Piston rings -add compression/ clean cylinder walls. *Connecting Rod- Connects piston to Crankshaft.

  5. Components (cont’d) • Camshaft- rotate to open and close valves. • Timing gear- Spin to control opening/closing of valves.

  6. Components (cont’d) • Intake valve- opens and closes to allow air fuel mixture to enter. • Exhaust valve- opens and closes to allow exhaust to escape.

  7. Components (cont’d) • Sparkplug- fits into cylinder head and ignites compressed fuel/air mixture. • Magneto- device which generates electric current when rotated. • Coil- (ignition coil) converts low voltage into high voltage needed for spark plug.

  8. Components (cont’d) • Fuel Tank- Stores gasoline • Air cleaner- Connects to carburetor, cleans incoming air. • Carburetor- regulates fuel intake and fuel air mixture.

  9. How 4 strokes work:

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