Where is BTDC on harmonic balancer?

BTDC stands for "Before Top Dead Center," indicating the position of the crankshaft in relation to the piston at the top of its stroke. On a harmonic balancer, BTDC is usually marked with a timing indicator or notch. This mark helps in timing the ignition to ensure the engine runs smoothly. To find it, look for a line or notch on the balancer that aligns with a timing scale typically located on the engine block.