A-B1692180-AI SPRING-VALVE model-991099 ZT48HD John Deere Tillers: 518R

John Deere Tillers: 518R

Part Type: Wear Ring / Guide Ring / Wear Band

31AH55TB710

and D31S-17 - fits units after serial number 25000 (some sources indicate after s/n 32001 for certain sub-variants

316-8 (Model 73422)

A-B1692180-AI SPRING-VALVE model-991099 ZT48HD John Deere Tillers: 518ROne New Aftermarket Replacement Valve Spring Fits Briggs & Fits Stratton Small Engines This aftermarket replacement valve spring (Spring Valve) Fits Briggs & Fits Stratton small gasoline engines used in lawn mowers, lawn tractors, and generators. The valve spring maintains correct tension on the engine's intake and exhaust valves, ensuring consistent valve timing, efficient combustion, and smooth engine operation. Replaces OEM part numbers 692180,