10074  (RD18979  Idle Gear)

Genuine Shimano Idle Gear (part #10074) — this gear is part of the oscillation mechanism in Shimano spinning reels, converting the rotary motion of the handle into the back-and-forth movement of the spool for even line distribution. A chipped or worn idle gear causes uneven line lay, spool stutter, and potential gear noise during retrieval. Cross-references with Shimano part number RD18979. OEM replacement ensures correct tooth profile and smooth, quiet operation. Available from Offshore Tackle & Repair in Stuart, FL — your trusted source for genuine Shimano spinning reel parts.