539117245 Deck Belt Compatible with Husqvarna Z246 RZ46 RZ4623 RZ46i RZ4619 RZ4621 LSZ4622 LSZ5422 LSZ5424 RZ4620 Mowers with 46" Deck, 5/8"x123" Replacement Belt Fits for John Deere M118756

What It Is

This is a replacement deck belt (5/8” x 123”) designed to drive the blades on Husqvarna Z246, RZ46, and compatible zero-turn mowers with a 46-inch cutting deck. It’s an aftermarket alternative to OEM part M118756, also fitting select John Deere models.

Fitment & Compatibility

Before buying, confirm three things:

1. Deck size: This belt fits 46-inch decks only. Measure your deck width or check your model number.
2. Model list: Verified for Husqvarna Z246, RZ46, RZ4623, RZ46i, RZ4619, RZ4621, LSZ4622, LSZ5422, LSZ5424, RZ4620. Also fits John Deere mowers using OEM part M118756.
3. Measurements: Belt is 5/8 inch wide, 123 inches long. Measure your old belt’s length (lay it flat, measure end-to-end) and width to confirm. If your original is slightly different, this won’t route correctly.

Key Things to Know

• Aftermarket quality: Typically matches OEM specs but may have slightly stiffer rubber. Break-in period of 1–2 hours is normal.
• Installation difficulty: Moderate. You’ll need to remove the deck or access the belt routing under the mower. Use a diagram (often on the deck or in the manual) to avoid misrouting.
• Common gotcha: If your deck has a spring-loaded tensioner, release tension before removing the old belt. Forcing the belt over pulleys can damage it.
• Lifespan: Expect 100–150 hours of use under normal conditions. Check for cracking or fraying annually.

Should You Buy It

Buy this if you own a compatible Husqvarna or John Deere 46-inch deck mower and need a budget-friendly, reliable replacement. It’s a solid aftermarket option for DIY maintenance, but if you prefer exact OEM feel or have a non-listed model, stick with the original Husqvarna or John Deere belt.