Which component uses multiple keyways, typically three or nine?

• A. Cam Gear
• B. Cam Bushing
• C. Adjustable Crankshaft Gear
• D. Bucket

Answer: (C)

Key concept: multiple keyways in timing gear allow discrete timing positions. The crankshaft gear that is designed to be adjustable uses several slots (keyways) so you can set the engine timing by moving the gear to a different keyway. Having three or nine positions provides several distinct timing offsets to choose from, enabling coarse timing adjustments without changing gear teeth or other components.

This is why the adjustable crankshaft gear is the best choice here. The cam gear on most engines is fixed to the camshaft with a single alignment method, so it doesn’t rely on multiple keyways for timing. The cam bushing and bucket are not used for timing adjustment via multiple keyways.