241381-01 Mower Replacement Insulator Blade Compatible with Black & Decker CMM625 CMM630 CMM750 LMM200 MM1800(2Pack)

What It Is

This is a replacement insulator blade (part number 241381-01) designed for select Black & Decker electric lawn mowers. It acts as a non-cutting spacer or shield that mounts between the blade and the mower deck, primarily used to improve airflow and debris ejection in mulching or bagging configurations.

Fitment & Compatibility

Before buying, verify your mower model is listed: CMM625, CMM630, CMM750, LMM200, or MM1800. This part is NOT a cutting blade—it’s an insulator/spacer that fits under the main blade. Check your owner’s manual or existing part for the exact OEM number (241381-01). Aftermarket replacements like this may have slight dimensional differences; measure the original insulator’s thickness and hole diameter (typically 1/4-inch center hole). Deck size (e.g., 18-20 inches) must match your model—this part is for 18-20 inch decks only. If your mower uses a different insulator shape or mounting pattern, it won’t fit.

Key Things to Know

• Low rating (3.4/5) suggests fitment or durability issues; multiple users report the plastic breaking or warping after a few uses.
• Installation is straightforward—remove the blade bolt, swap the old insulator, and re-torque the bolt to spec (typically 30-40 ft-lbs). No special tools needed.
• Common gotcha: the insulator is thin and brittle; overtightening the bolt can crack it. Use a torque wrench and avoid impact drivers.
• Two-pack is useful for spares, but check if your mower actually needs two (most use one per blade assembly).

Should You Buy It

Buy this only if you need a cheap, immediate replacement for a broken insulator and your mower is out of warranty. For long-term reliability, consider sourcing an OEM Black & Decker part (#241381-01) or a higher-rated aftermarket option. If your mower is still working fine, skip it—the low quality and mixed reviews make this a last-resort purchase.