Rev your brain as you build, display and learn about engines with this Smithsonian Motor-Works model engine.
- Four-cylinder model engine parts
- Valves rock, spark plugs fire and pistons drive crankshaft
- Includes washers, 2 shafts, 4 exhaust valves, 4 intake valves, 8 valve stems, 4 piston valves, 4 connecting rods, 8 timing cams, 8 rocker arms, 1 crankshaft pulley, 1 fan pulley, 1 fan, 1 engine mounting stand, 5 bearings, 1 clutch housing, 1 oil pan & 1 lower crankcase
- Ages 8 years & up
- Requires 4 "AA" batteries (not included)
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