Exmark 116-5171-S Extreme Blade Lazer Z AC AS XP XS E S X Z Series 72 Inch 3 Pack

What It Is

This is a set of three OEM Exmark Extreme blades (116-5171-S) designed for 72-inch cutting decks on Exmark Lazer Z, AC, AS, XP, XS, E, S, and X Series zero-turn mowers. They are heavy-duty, high-lift blades intended for commercial-grade cutting of thick or tall grass.

Fitment & Compatibility

Before buying, verify:

• Deck size: 72-inch deck only (these blades will not fit 60-inch or 48-inch decks).
• Blade length: 24.5 inches (center hole to tip). Measure your current blade to confirm.
• Center hole: 1-inch diameter (round, not star-shaped). Check that your spindle matches.
• OEM vs aftermarket: This is genuine Exmark, not a third-party blade. If you need a cheaper alternative, look for aftermarket blades with the same length, hole size, and thickness (0.203 inch).
• Model series: Works on Lazer Z, Lazer Z AC, Lazer Z AS, Lazer Z XP, Lazer Z XS, Lazer Z E, Lazer Z S, and Lazer Z X. Not compatible with older Lazer Z (pre-2000) or non-Exmark decks.

Key Things to Know

• Cut quality: High-lift design gives excellent grass discharge and bagging but may leave windrows (stripes) in wet grass. Adjust ground speed if you see clumping.
• Installation: Straightforward—use a torque wrench to tighten spindle bolts to 70–90 ft-lbs. Do not overtighten; stripping the spindle is common.
• Durability: Heat-treated steel holds an edge well but will dull faster if you mow sandy or rocky soil. Sharpen after every 25 hours of use.
• Balance: Each blade is factory-balanced, but always check balance after sharpening. An unbalanced blade causes vibration and spindle wear.

Should You Buy It

If you own a 72-inch Exmark Lazer Z (2000 or newer) and need OEM-grade blades for heavy commercial use, this 3-pack delivers reliable cut quality and long life—worth the premium over aftermarket blades. Skip it if you have a smaller deck, a different brand mower, or only mow a residential lawn (a standard-duty blade will save you money).