Oregon 92-676 Gator G3 Lawn Mower Blade, 21-3/8-Inch, Replaces Sunbelt, Arnold, John Deere and More

What It Is

The Oregon 92-676 Gator G3 is a 21-3/8-inch mulching blade designed for residential zero-turn and walk-behind mowers. It uses a serrated edge to chop clippings finer, returning nutrients to the lawn.

Fitment & Compatibility

Measure your blade first – this is 21-3/8 inches long, with a 1-inch center hole and 0.5-inch offset (measured from center hole to blade tip). It fits many Sunbelt, Arnold, and John Deere models, but verify your deck’s bolt pattern: the 5-point star center hole (similar to John Deere’s “D” hole) is standard, but some decks use a 7-point or round hole. Check your owner’s manual or measure the existing blade’s length, center hole size, and offset. Aftermarket, it replaces OEM part numbers like John Deere M155678, Sunbelt SB-12, and Arnold 490-610-0004. Not for EGO battery mowers – this is a gas-engine blade despite the “EGO” brand mention in the listing (likely a data error).

Key Things to Know

• Quality is inconsistent – 3.2-star rating reflects complaints about blades arriving dull, bent, or with unbalanced edges. Inspect upon arrival.
• Installation is easy – standard center hole and offset mean it bolts on like any OEM blade. Torque to 35-50 ft-lbs (check your mower spec).
• Mulching performance is good – the Gator design catches clippings and shreds them, but it’s loud and creates more dust than standard blades.
• Balance check required – many users report needing to balance the blade manually (file or grind high spots) to avoid vibration.

Should You Buy It

Buy this if you need a budget mulching blade for a gas mower with a 21-3/8-inch deck and you’re comfortable checking balance and sharpening on arrival. Skip it if you want a ready-to-install, high-quality blade – the low rating suggests frequent defects.