00273100 Mulching Blades Fit for 36" 52" Deck Tractor, 482878 Mower Blades Fit for Gravely A riens Lawn Mowers, Replace for Ex Mark 1-633482, Scag 482462, Bad Boy 038-3000-00, 3 Pack

What It Is

This is a set of three aftermarket mulching blades designed to cut grass into fine clippings that decompose quickly, reducing the need for bagging. They fit 36-inch and 52-inch cutting decks on tractors and zero-turn mowers from Gravely, Ariens, Ex Mark, Scag, and Bad Boy.

Fitment & Compatibility

Before buying, verify your deck size (36" or 52") and model. These blades replace OEM part numbers 00273100, 482878, Ex Mark 1-633482, Scag 482462, and Bad Boy 038-3000-00. Measure your existing blade length (typically 18-20 inches for these decks), center hole diameter (usually 1" or 5/8"), and thickness (about 0.25"). Check that your spindle pattern matches—most use a standard 5-point star or offset hole. If your deck requires a specific sail height or wing design, compare photos to your current blade. Not all 36" or 52" decks use the same blade; confirm your model number in the compatibility list.

Key Things to Know

• Quality: Aftermarket blades may be slightly thinner or lighter than OEM, but at 4.4 stars from 75 reviews, most users find them durable for residential use. Expect faster wear on heavy or wet grass.
• Installation: Easy with basic tools—jack up the deck, remove the center bolt, and replace. Torque the bolt to 70-90 ft-lbs. Use a blade balancer after installation to avoid vibration.
• Common Gotchas: Mulching blades require sharp edges for fine clippings; dull blades tear grass. They work best with a mulching plug or kit (not included). On 52" decks, you may need to flip or stagger blades for overlap. Check that the blade tip clearance to the deck is at least 1/4".

Should You Buy It

Buy these if you have a compatible 36" or 52" deck from Gravely, Ariens, Ex Mark, Scag, or Bad Boy and want an affordable mulching upgrade for residential mowing. They’re a solid value for the price, but skip them if you need OEM-grade durability for commercial use or a perfect fit for a less common deck model.