8TEN Deck Blade Belt Kit for AYP Husqvarna RZ4619 RZ4621 RZ4623 Z246 403107 539117245 46 Inch

What It Is

This is a complete 46-inch deck blade belt kit from 8TEN, designed to replace the OEM belt and blades on AYP (American Yard Products) and Husqvarna zero-turn mowers. It’s meant for routine service—replacing worn blades and the deck drive belt in one go.

Fitment & Compatibility

Deck size: Fits 46-inch cutting decks only.
Models: Compatible with Husqvarna RZ4619, RZ4621, RZ4623, and Z246. Also fits AYP (Craftsman, Poulan, McCulloch) models using the same 46-inch deck and belt part numbers.
OEM cross-references: 403107 (belt) and 539117245 (blade set). If your mower uses these OEM numbers, it’s a direct swap.
What to check before buying:

• Confirm your deck is exactly 46 inches (measure blade tip to tip).
• Verify your current belt part number matches 403107 or 539117245.
• Check blade measurements: each blade is roughly 18.5 inches long with a 1-inch center hole and 7/8-inch offset. If your blades are a different length or hole size, this kit won’t fit.
• This is an aftermarket kit, not OEM—fitment is solid for the listed models, but always compare your old belt routing and blade shape before installing.

Key Things to Know

• Quality: Blades are heat-treated steel, but not as thick as OEM Husqvarna blades. Expect slightly shorter lifespan in heavy or rocky conditions. Belt is reinforced Kevlar and holds up well.
• Installation: Moderate difficulty—requires removing the deck, releasing belt tension, and swapping blades. A belt diagram is usually printed on the deck or in your manual.
• Common gotcha: The belt may feel tight on initial install. Double-check routing around all pulleys and tensioner—it’ll seat after a few minutes of run time.
• Blade balance: Out of the box, blades are usually balanced, but it’s worth checking with a blade balancer to avoid vibration.

Should You Buy It

If you need to replace both blades and the belt on a compatible 46-inch AYP or Husqvarna zero-turn, this kit saves time and money over buying parts separately. It’s a solid value for routine maintenance on residential mowers. Not ideal for heavy commercial use—OEM blades last longer under constant abuse.