Maxpower replacement secondary deck belt 1/2" x 95.5" for 46" & 50" mowers — OEM-spec durability

The MaxPower 336139 secondary belt is a durable replacement drive belt sized 1/2" x 95.5" for 46" and 50" cut Craftsman, Husqvarna, and Poulan mowers.

When your mower’s secondary belt shows wear, cracking, or frayed edges, replacing it with a correctly sized, OEM-spec belt restores reliable deck engagement and efficient power transfer. The MaxPower 336139 is engineered to match or exceed original equipment specifications and serves as a direct substitute for a variety of factory part numbers, making it a practical repair option for many 24H4B3A deck setups.

Will this belt fit my 46" or 50" cutting deck?

Yes — the 336139 is designed specifically for 46-inch and 50-inch cutting decks that use the 24H4B3A configuration. Confirm compatibility by checking your mower’s deck model and the belt size stamped on the old belt.

• Exact measurement: 1/2" (width) x 95.5" (length)
• Fits decks listed as 24H4B3A
• Compatible with Craftsman, Husqvarna, and Poulan models using these specs

Which original part numbers does this replace?

The MaxPower 336139 replaces several OEM and aftermarket numbers so you can match it to the part referenced in your manual or parts diagram. It’s intended as a drop-in replacement for those legacy part codes.

• Replaces OEM 144959 and 532144959
• Equivalent to PP12012, 532 14 49-59, and 531307218
• Use any of these numbers to cross-check fitment in parts lists

How does this belt compare to the original equipment?

Manufactured to meet or exceed OEM standards, the MaxPower 336139 is built for durable belt life and consistent performance under normal mowing loads. Materials and construction aim to replicate pulley engagement, tension retention, and resistance to common wear modes.

• Made to OEM dimensional and material tolerances
• Engineered for reliable flex and heat resistance
• Suitable for routine lawn-mowing duty and seasonal use

How do I know when to replace the secondary belt?

Replace the belt if you notice slipping, visible cracking, missing ribs, glazing, or if the deck no longer engages smoothly. Routine inspection at the start of each mowing season prevents unexpected failures while cutting.

• Signs: fraying, cracking, glazing, stretched length
• Listen for squeal or feel for slip during blade engagement
• Replace proactively if belt age or hours suggest wear

Who this is for: Lawn care do-it-yourselfers and repair shops that need a reliable, OEM-spec secondary deck belt for 46" and 50" Craftsman, Husqvarna, and Poulan riding mowers. If your parts list shows any of the cross numbers (144959, 532144959, PP12012, 532 14 49-59, 531307218) or you measure a belt at 1/2" x 95.5", the MaxPower 336139 provides a straightforward replacement engineered for long service life and consistent belt performance.