ENGINERUN Lawn Tractor Torsion Spring – Left Side Blade Idler Spring – Replaces MTD Cub Cadet Troy-Bilt 732-05151A – Fits XT1 LT42 LT46 LX42KH TB42 TB46

If your mower deck belt isn't staying tight or the idler pulley feels sloppy, the torsion spring might be the culprit.

This ENGINERUN torsion spring is designed as a direct replacement for OEM part numbers 732-05151A and 732-05151 – so it's a no-fuss swap.

It fits a bunch of popular mowers: Troy-Bilt XT1 LT42, LT46, LX42KH, TB42, TB46, plus Cub Cadet, Yard Man, Husky, and Murray models with compatible decks.

This is specifically the left-side spring, so make sure you're replacing the correct side.

The spring provides the right tension to keep your idler pulley pressed against the belt, ensuring smooth engagement and consistent cutting.

Made to last with the right material and temper, so it holds up under vibration and heavy use.

Installation is straightforward – no special tools needed.
Just remove the old one, hook the new one in place, and get back to mowing.

Saves you from buying a whole new deck assembly.