Oregon 6PK 396-730 G6 Gator Blades Replacement for John Deere M128485 M131958 M144196 M163983 TCU15881

What It Is

The Oregon 6PK 396-730 G6 Gator Blades are a six-blade set of aftermarket mulching blades designed for select John Deere zero-turn and riding mowers with 60-inch decks. They replace OEM part numbers M128485, M131958, M144196, M163983, and TCU15881, and are built for heavy-duty mulching and bagging performance.

Fitment & Compatibility

Before buying, confirm your mower has a 60-inch cutting deck and uses six blades (two per spindle). These blades are not universal—they only fit John Deere models that accept the OEM part numbers listed above. Common compatible models include John Deere Z930M, Z950M, Z995M, and X700 series, but always double-check your deck’s part number. Measure your existing blade length: these are 20.5 inches long with a 1-inch center hole and 2.5-inch blade pitch. If your mower uses a different hole size or length, these won’t fit. They are aftermarket, not OEM, so warranty implications vary by manufacturer.

Key Things to Know

• Quality: Oregon Gator blades are known for durable, heat-treated steel and a serrated edge that improves mulching and bagging. They hold an edge well but may dull faster than OEM in sandy soil.
• Installation difficulty: Moderate. You’ll need a torque wrench (tighten to 70-90 ft-lbs) and a blade removal tool. The six-blade setup doubles the work of a standard three-blade swap.
• Common gotchas: Always replace all six blades at once to avoid imbalance. Check spindle condition before installing—worn spindles can cause uneven wear. These blades are heavier than OEM, which may slightly reduce engine RPM on some mowers.
• No universal fit: Even if your deck is 60 inches, verify your mower uses the listed OEM numbers. Some Deere models with 60-inch decks use different blade patterns.

Should You Buy It

Buy this set if you own a compatible John Deere 60-inch zero-turn or riding mower and want a high-quality aftermarket mulching blade that improves cut quality and bagging over OEM. It’s ideal for homeowners or light commercial users who mow frequently and want a durable, cost-effective replacement. Avoid if your mower isn’t on the fitment list or you prefer OEM parts for warranty reasons.