08300711 Heavy-Duty Extension Spring — 11 1/2" Overall, 8 3/4" Coil | Compatible with Ariens Gravely Apex 48"/52"/60" Carb CE, ZT HD 44-60", Pro-Turn 48-60"

High-strength replacement extension spring made from durable spring steel, sized to an overall length of 11 1/2" with a coil length of 8 3/4". Designed with hook ends for secure attachment, this heavy-duty tension spring provides the elasticity and fatigue resistance needed to reduce belt slippage and extend the service life of mower drive systems under heavy load.\n\nBuilt to OEM specification, this part strictly matches original part number 08300711 and delivers factory-equivalent tension and longevity for seasonal mowing use. It functions as a direct-fit tensioner spring for zero-turn and deck drive applications, offering an easy swap to restore correct belt tension.\n\nCompatibility covers Ariens and Gravely equipment including Apex 48"/52"/60" Carb CE models, ZT HD 44-60" machines, and Pro-Turn 48-60" series. It is also suitable for zero-turn mower deck tension spring tasks and works with Cub Cadet belt tensioner systems. Additionally, this industrial-grade replacement is compatible with Toro deck belt tensioner spring and John Deere 130 mower spring applications.\n\nCommon failures this spring addresses include fractures, belt slack, and loss of power transmission; replacing a worn spring with this unit helps restore peak drive efficiency. Installation is straightforward—designed as a direct-fit extension spring with hooks for quick replacement. When fitting the spring, inspect tensioner pulley bearings and verify belt condition to ensure optimal performance in drive belt tensioner and deck tensioner spring configurations.