1/2 Inch x 105 3/4 Inch Lawn Mower Deck Belt Fits Craftsman 7133156, AYP 405143 584453101

What It Is

This is a 1/2-inch wide by 105 3/4-inch long lawn mower deck belt designed to transfer engine power to the mower blades on select Craftsman and AYP riding mowers. It’s a common replacement belt for 42-inch and 46-inch cutting decks.

Fitment & Compatibility

Before buying, confirm your mower’s deck belt length and width. This belt is 1/2-inch wide and 105 3/4 inches long. It directly replaces OEM part numbers 7133156 (Craftsman), 405143 and 584453101 (AYP). It fits many Craftsman LT1000, LT2000, and GT3000 series mowers with 42-inch or 46-inch decks, plus some Husqvarna, Poulan, and McCulloch models using AYP decks. Measure your old belt’s length end-to-end (not around pulleys) and check your owner’s manual for your specific model number. Aftermarket belts may vary slightly in thickness or material from OEM, so verify the belt rides smoothly in all pulley grooves.

Key Things to Know

• Quality: This aftermarket belt is typically reinforced with polyester cord for decent durability, but may not last as long as OEM belts under heavy use or in wet grass.
• Installation: Moderate difficulty—requires removing the deck or accessing the belt routing under the mower. Use a belt routing diagram (often on the deck or in the manual) to avoid misrouting. A belt tensioner tool may be needed.
• Common gotchas: The belt can be tight to install; loosen the tensioner fully. Check for worn pulleys or a bent spindle before installing—new belt on worn parts will fail quickly. Ensure the belt isn’t twisted after installation.
• Storage: Keep spare belts in a cool, dry place away from oil and sunlight to prevent premature aging.

Should You Buy It

Buy this belt if you need a budget-friendly replacement for a Craftsman or AYP riding mower with a 42-inch or 46-inch deck and want to save money over OEM. It’s a solid choice for light-to-medium duty mowing, but if you mow tough, thick grass frequently or want maximum lifespan, consider spending more on an OEM belt.