8TEN LawnRAZOR Blade Set for Exmark Lazer Z Turf Tracer E S X AS CT Series 48" Deck 103-6391 (Mulching) 3 Pack

What It Is

This is a 3-pack of mulching blades from LawnRAZOR, designed to replace OEM part 103-6391 for Exmark Lazer Z, Turf Tracer, E, S, X, AS, and CT series mowers with a 48-inch deck. The blades are engineered to cut grass into fine clippings that decompose quickly, reducing bagging needs.

Fitment & Compatibility

Before buying, verify your Exmark deck is exactly 48 inches—not 52 or 60. This set fits most Lazer Z models (including E, S, X, AS, CT series) and Turf Tracer models from the early 2000s onward. Measure your existing blade length: OEM 103-6391 is 18.5 inches long, with a 1-inch center hole and 5/8-inch arbor hole. Check your spindle thickness; these blades are compatible with standard Exmark spindles but may not fit aftermarket spindles with different bore sizes. Confirm your blade bolt pattern matches (two holes, 3 inches apart). If your current blades are 103-6391 or cross-reference to it, this set fits.

Key Things to Buy

• Quality: LawnRAZOR blades are heat-treated and coated for rust resistance, but some users report they’re slightly thinner than OEM Exmark blades. Expect a 2–3 season lifespan under normal residential use.
• Installation: Easy—remove the center bolt, swap blades, torque to 70–90 ft-lbs. Use a blade lock or block of wood to prevent spinning. No special tools needed.
• Gotchas: Mulching blades require sharp edges for fine clippings; dull blades tear grass. Check deck level and blade balance after install. These blades may slightly reduce bagging efficiency if you switch between mulching and bagging frequently.
• Noise: Slightly louder than standard lift blades due to increased surface area.

Should You Buy It

If you own a 48-inch Exmark Lazer Z or Turf Tracer and want affordable mulching performance without paying OEM prices, this set is a solid choice. It’s ideal for homeowners or light commercial use who prioritize fine clippings over maximum discharge. For heavy commercial mowing or if you need OEM-grade thickness, stick with genuine Exmark blades.