Gravely Zero Turn Mulching Kit OEM Part # 79220200 52" Decks

What It Is

This Gravely OEM mulching kit (part #79220200) converts 52" cutting decks on select Gravely zero-turn mowers from side-discharge or bagging to a fine-cut mulching system. It’s designed for operators who want to leave nutrient-rich clippings on the lawn rather than collecting or broadcasting them.

Fitment & Compatibility

• Deck size: Only fits Gravely 52" fabricated decks (not stamped or 48"/60" models).
• Models: Compatible with Gravely ZT HD, ZT X, ZT XL, Pro-Turn Z, and Pro-Turn XZ series (model years vary—check your serial number).
• OEM vs aftermarket: This is genuine Gravely; aftermarket kits may fit but often require modifying baffles or using non-OEM blades, which can void deck warranties.
• What to check before buying: Measure your deck width (edge to edge) and confirm your deck is a “fabricated” (welded) type. Look up your mower’s model number in Gravely’s parts diagrams—if your deck accepts part #79220200, you’re good.

Key Things to Know

• Installation difficulty: Moderate. You’ll remove the discharge chute and install the kit’s baffle plate, then swap to the included mulching blades. Expect 30–60 minutes with basic hand tools.
• Quality: Heavy-gauge steel baffle, powder-coated to resist rust. The blades are OEM-grade hardened steel—sharper and longer-lasting than generic replacements.
• Performance: Best in dry grass; wet or tall grass will clump and leave uneven clippings. You may need to mow more frequently to avoid overloading the deck.
• Common gotcha: The kit includes new blade bolts and washers—do not reuse old ones. Torque blades to 70–80 ft-lbs; under-tightening can cause blade detachment.

Should You Buy It

Buy this kit if you have a Gravely 52" fabricated deck, mow weekly, and want a clean, fine-mulch finish without bagging. It’s a premium OEM solution—reliable fit, no guesswork—but at $312, it’s only cost-effective if you’re committed to mulching long-term. Skip it if you frequently mow wet or overgrown grass, or if you need a universal kit for a non-Gravely deck.