PAIR OF 2 KEYS: This listing is for a pair (2) of brand-new replacement keys, precision cut by code 853 on the YH52R key blank for Mercury/Yamaha-style marine locks and ignition switches using the 841–860 code series on this reverse (R) keyway. These are code-cut keys made to factory spacing and depth—not copies traced from a worn key—so you receive a clean, consistent key even when the original is worn, bent, or was duplicated poorly. Common applications include boat ignition key switches at the helm/console, glove box and compartment locks, storage hatches, lockers/livewells, and other marine cam locks that share this key profile. Typical environments include marinas, docks, storage yards, and trailer setups where having a spare pair helps prevent lockouts during trips or service. To ensure proper fit, your lock (or original key) must be clearly stamped with code 853 and must use the matching YH52R keyway—codes are not universal across different key profiles. If the cylinder has been replaced or re-keyed, the stamped number may not match what currently operates it. For best results in marine environments, confirm smooth operation and use a corrosion-inhibiting lubricant; damaged or sticky cylinders can prevent any correctly cut key from turning. Cross-reference note: this keyway is commonly referenced as Ilco YH52R (for identification only; the full list is provided in the bullets). Manufactured by The Lock Doctor LLC under the KEYSALACARTE brand.