Motor Fan+Blade Bolt Compatible with KM-2041B-06 40V Cordless Lawn Mower

What It Is

This is a replacement motor fan and blade bolt set designed specifically for the KM-2041B-06 40V cordless lawn mower. It serves dual purposes: the motor fan cools the electric motor during operation, while the blade bolt secures the mower blade to the spindle.

Fitment & Compatibility

• Exact model match: Only confirmed to fit the KM-2041B-06 40V mower. Do not assume it works with other KM-branded or 40V models without cross-referencing.
• Deck size: The mower’s deck is typically 17 inches; verify your deck width and blade bolt hole pattern (likely 5-point star or hex) before purchasing.
• OEM vs aftermarket: This is a generic aftermarket part, not OEM from KM. Check if your mower uses a left-hand thread blade bolt (common on electric mowers) – this bolt may be standard right-hand.
• Measurements: Fan diameter should match your original (approx. 4–5 inches). Bolt length and thread pitch (likely M8 x 1.25 or M10 x 1.5) must be confirmed with your existing bolt.

Key Things to Know

• Quality concerns: With a 3.8 rating from only 10 reviews, expect inconsistent fit or early wear. The motor fan is plastic and may warp under heat if not identical to OEM.
• Installation difficulty: Moderate – requires removing the blade, cleaning the spindle, and aligning the fan. Use a torque wrench (recommended 30–40 ft-lbs for blade bolt) to avoid stripping or loosening.
• Common gotcha: The fan may not sit flush if the spindle has a different keyway or notch. Dry-fit before tightening. Also, the blade bolt may be too short or long for your blade stack (blade + washer + fan).
• No hardware included: Some reviews note missing washers or lock washers – check your original assembly and reuse if needed.

Should You Buy It

Only buy this if you have the KM-2041B-06 and cannot find an OEM fan/bolt kit, or if you’re on a tight budget and comfortable with potential fitment tweaks. For critical cooling or safety, spend extra on an OEM part – the low review count and aftermarket risk make this a gamble for most users.