Set of Three Lawn Mower Blades Fits Exmark Quest 50" Deck E and S Series Replaces 115-5059-03

What It Is

This is a set of three replacement blades for Exmark Quest mowers with a 50-inch cutting deck, compatible with E and S Series models. It replaces OEM part number 115-5059-03 and is designed for medium-duty residential mowing.

Fitment & Compatibility

Before buying, confirm your Exmark Quest has a 50-inch deck (measure deck width if unsure). Check your model number—this fits E Series (e.g., QZE) and S Series (e.g., QZS) only, not other Exmark lines like Lazer or Turf Tracer. Verify your existing blade part number is 115-5059-03; aftermarket blades may have slight dimensional differences (length, hole size, or thickness). Measure your current blades: length should be ~16.5 inches, center hole diameter 0.75 inches, and offset 0.5 inches. If your deck uses different spindle spacing or blade design, this set won’t fit.

Key Things to Know

• Quality: Made from heat-treated carbon steel, comparable to OEM but may require balancing before installation (check for vibration). Some users report shorter edge life than OEM, so inspect regularly for dullness.
• Installation Difficulty: Easy—requires a socket wrench and blade removal tool. Torque bolts to 70-80 ft-lbs. Use blue threadlocker to prevent loosening.
• Common Gotchas: Blades may arrive with sharp edges; wear gloves. Ensure the “up” arrow on each blade points toward the deck—incorrect orientation causes poor cut and vibration. Replace all three at once for balanced cutting.
• Maintenance: Sharpen after 25 hours of use or when grass tears instead of cuts. Mow dry grass to extend blade life.

Should You Buy It

If you own an Exmark Quest 50” E or S Series and want a budget-friendly, solid-performing alternative to OEM blades, this set is a good value. It’s suitable for regular residential lawns but may not hold up as well in heavy-duty or commercial conditions—stick with OEM if you mow thick, wet grass daily.