AMTHKNO 19A70041 19A70041100 Mulching Kit for Most MTD/CUB Cadet/Craftsman/Troy-Bilt, Zero-Turn Mowers 42" 742-0616 742-04312 942-0616 942-04312, RZT SX XT1 XT2 ZT1 19A70041 19A70041799

What It Is

This mulching kit replaces the standard side-discharge chute and blades on select 42-inch zero-turn mowers from MTD brands (Cub Cadet, Craftsman, Troy-Bilt). It recirculates clippings for finer cutting, letting grass decompose as natural fertilizer. Best for frequent mowing on flat, dry lawns.

Fitment & Compatibility

Crucial checks before buying:

• Deck size: Fits only 42-inch (107 cm) cutting decks. Measure your deck width; if it’s 46" or 54", this won’t work.
• Model numbers: Works with Cub Cadet RZT SX, XT1, XT2, ZT1 series. Also fits Craftsman ZT 7000, Troy-Bilt Mustang 42, and select MTD 42" zero-turns.
• OEM part cross-reference: 19A70041, 19A70041100, 19A70041799. Aftermarket versions are also available for ~$30–$50.
• Blade part numbers: Uses OEM blades 742-0616, 742-04312, 942-0616, 942-04312. Check your current blade part number to confirm interchangeability.
• What to measure: Ensure the deck spindle pattern matches (typically 5-point star, 1" center hole). The kit includes a mulch plate and baffle; verify your deck has pre-drilled mounting holes for the baffle.

Key Things to Know

• Quality: Decent steel construction, but the mulch plug can warp if left in direct sunlight or stored wet. Expect 2–3 seasons of regular use.
• Installation: Moderate difficulty – requires removing the discharge chute, swapping blades, and attaching the baffle. You’ll need a socket wrench and torque wrench (final torque: 70–80 ft-lbs on blade bolts). Plan 30–45 minutes.
• Common gotcha: The kit may not include new blade bolts. Reuse your old ones if they’re in good shape, or buy replacements (part 742-04312). Also, the baffle may require minor trimming if your deck has welded stiffeners.
• Performance note: Works best mowing no more than 1/3 of grass height per pass. Clumping occurs on wet grass – wait for dew to dry.

Should You Buy It

Buy this if you have a 42" MTD/Cub Cadet/Craftsman/Troy-Bilt zero-turn and want to eliminate bagging on a small-to-medium lawn (under 1 acre). It’s a solid, affordable upgrade for frequent mowing, but skip it if you often cut tall or wet grass – you’ll get clumping and uneven mulching.