103-6338 Blade Set for Ex Mark 60'' Deck, Toothed Mulching Blade Compatible with Ex Mark Lazer Z AC, Bad Boy Toro Hustler Zero Turn Mowers, Replace for 116-5173-S, 103-6338-S, 103-2530, 3 Pack

What It Is

The 103-6338 blade set is a three-pack of toothed mulching blades designed for 60-inch Ex Mark decks, primarily used on commercial zero-turn mowers. These blades are meant to chop clippings finer for better mulching and bagging performance, and they serve as a direct replacement for OEM part numbers 116-5173-S, 103-6338-S, and 103-2530.

Fitment & Compatibility

Before purchase, verify your mower has a 60-inch cutting deck—this set is for three blades, so it will not fit 48-inch or 72-inch decks. These blades are compatible with Ex Mark Lazer Z AC, Bad Boy, Toro, and Hustler zero-turn mowers that use a 60-inch deck with a 3-blade spindle pattern. Measure your existing blade length (should be approximately 20.5 inches from tip to tip) and center hole diameter (typically 1 inch or 5/8 inch). Check that your blade mounting pattern matches—most Ex Mark and Toro models use a 5/8-inch center hole. If your mower uses a different hole size or offset pattern, these blades will not fit. Always cross-reference your OEM part number (e.g., 116-5173-S) with this set.

Key Things to Buy

• Quality & durability: These are aftermarket blades made from hardened steel, comparable to OEM in thickness and edge retention. Expect a lifespan of 25–50 hours of mowing, depending on debris and grass conditions.
• Installation difficulty: Easy to install with basic tools (a socket wrench and torque wrench). You will need to lift the deck or remove the blades with the mower off and spark plug disconnected. Torque bolts to 70–90 ft-lbs.
• Common gotchas: The toothed mulching design may not lift grass as aggressively as standard high-lift blades—avoid in wet or tall grass. Also, these blades are directional; ensure the cutting edge faces the direction of rotation. Some users report slight balance issues; check with a blade balancer before installation.
• Price vs. OEM: At $42.99 for three blades, this is roughly 30–40% cheaper than buying three OEM Toro blades individually. The trade-off is a slightly shorter lifespan and no manufacturer warranty.

Should You Buy It

If you own a 60-inch Ex Mark, Toro, Bad Boy, or Hustler zero-turn and want a cost-effective mulching blade that delivers fine clippings and decent durability, this set is a solid value. It is best for homeowners or light commercial users who mulch regularly, not for heavy-duty commercial operators who need maximum lift or longer blade life.