ILONPA 3 Pack 04265400 42" Mower Blades for Gravely ZT 42" Zero Turn Ariens Zoom Series 42 inch Deck Lawn Mower 915159 915161 915171 915233 915323 (Notched High Lift) Replace 1134-9210-01, Black

What It Is

This is a 3-pack of aftermarket high-lift mower blades designed for 42-inch zero-turn mowers, specifically Gravely ZT 42 and Ariens Zoom 42-inch deck models. The notched high-lift design improves grass lift and discharge for better mulching and bagging in thick or damp conditions.

Fitment & Compatibility

Before buying, confirm your mower has a 42-inch deck (measure deck width, not cutting path). These blades fit Gravely ZT 42 (models 915159, 915161, 915171, 915233, 915323) and Ariens Zoom 42-inch decks. OEM cross-references include ILONPA’s 04265400, Gravely/Ariens 1134-9210-01, and 915159/915161/915171/915233/915323. Each blade measures roughly 21 inches long, 2.5 inches wide, with a 1-inch center hole and 5-point star drive. Verify your spindle pattern matches—some older decks use a different drive. Aftermarket fit is fine, but aftermarket blades may differ slightly in thickness or balance compared to OEM.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a socket wrench and a torque wrench to tighten to 70-90 ft-lbs. Use thread locker on bolts to prevent loosening.
• Common gotcha: High-lift blades increase grass lift but also increase vibration and noise, especially at full throttle. If your deck is uneven or spindles worn, expect more shake.
• Quality: These are budget-friendly aftermarket blades. They may not hold an edge as long as OEM or premium brands (e.g., Oregon). Check balance before installing—unbalanced blades cause deck wear and poor cut.
• Durability: The black coating resists rust initially but will wear quickly in abrasive conditions. Not ideal for rocky or sandy lawns.

Should You Buy It

Buy these if you need a quick, affordable replacement for a Gravely ZT 42 or Ariens Zoom 42 and you’re okay with slightly shorter lifespan and higher vibration than OEM. They’re a solid value for average home use with frequent sharpening. Skip them if you mow professionally, need maximum durability, or have a deck with known balance issues—spend extra on OEM or premium aftermarket blades.