10DKY  (RD18784  Idle Gear (Large)

Genuine Shimano Idle Gear - Large (part #10DKY) — this larger idle gear is a key component of the oscillation system in Shimano spinning reels, working with the smaller idle gear to convert rotary handle motion into smooth linear spool travel. Worn teeth on the idle gear cause uneven line lay, spool stutter, and clicking noises during retrieve. Cross-references with Shimano part number RD18784. OEM replacement ensures correct tooth geometry and quiet, even oscillation. Available from Offshore Tackle & Repair in Stuart, FL — your trusted source for genuine Shimano spinning reel parts.