Generic 38" Lawn Mower Deck Blades (2-Pack) Replacement for Simplicity 1704101/1704856 — 0.203" Thick, Air-Lift Offset

These two replacement 38" deck blades restore cutting performance on Massey Ferguson and Simplicity lawn tractors that use part numbers 1704856 or 1704101.

If your mower deck is leaving uneven stripes, tearing grass, or making extra noise, worn or damaged blades are often the cause. This 2-pack of replacement blades fits 38-inch cut decks that accept Simplicity part numbers 1704856 and 1704101 (Oregon equivalents), offering the correct lengths, thickness, center hole size, and air-lift offsets to match factory specifications. Each blade is made to the dimensions needed for a secure fit and consistent cutting geometry so you can get back to a clean, even cut without modifying the deck.

How do these blades match my mower’s specifications?

Each blade in this set corresponds to a specific Simplicity part and mirrors the original measurements so they mate with the spindle and deck geometry as intended. Using the correct length, width, thickness, center-hole diameter, and air-lift offset keeps blade balance and mower clearance within manufacturer tolerances.

• Replacement for part 1704856: 16 1/8" length, 2" width, 0.203" thickness, 3/4" center hole, 1 1/8" air lift.
• Replacement for part 1704101: 22 1/4" length, 2" width, 0.203" thickness, 3/4" center hole, 1 1/16" air lift.
• Designed to fit 38" cut decks on Massey Ferguson and Simplicity models compatible with those part numbers.

Will installation require special tools or blade modifications?

Installation is straightforward with common yard equipment and basic hand tools; no cutting or reshaping is required when you match the blade to the correct part number. Always follow the tractor manufacturer’s instructions for blade replacement and use proper torque on spindle nuts.

• Use a wrench or socket to remove the spindle nut and existing blade.
• Confirm blade orientation and air-lift offset before tightening.
• Re-torque to manufacturer spec and check balance to avoid vibration.

How do these blades affect cutting performance and durability?

Replacing worn blades with correctly sized replacements restores cutting edge geometry and deck airflow, which improves grass lift and produces a cleaner, more even cut. Properly matched blades also reduce stress on the spindle and decrease the risk of scalping or uneven wear across the deck.

• Restores even grass discharge and striping when properly installed.
• Correct thickness (0.203") maintains structural strength and balance.
• Air-lift offsets re-establish the deck’s designed airflow for better clipping lift.

Who is this for: This 2-pack is intended for owners of 38" cut Massey Ferguson and Simplicity lawn tractors (or other machines that accept the same specifications) who need direct-fit replacements for part numbers 1704856 and 1704101. It's a practical choice for DIY maintenance, landscaping professionals replacing worn blades between seasons, and anyone restoring cutting performance without modifying the mower deck.