Original Craftsman Husqvarna Part # 136420 Mulching Cover For 42" Decks

What It Is

This is an OEM mulching cover (part # 136420) designed for 42-inch cutting decks on select Craftsman and Husqvarna lawn tractors. It replaces the side-discharge chute or bagger adapter to convert the deck for mulching—finely chopping grass clippings and returning them to the lawn.

Fitment & Compatibility

• Deck size: Fits only 42-inch (107 cm) decks. Measure your deck width or check the model number; 42” decks are common on tractors like Craftsman T110, T120, and Husqvarna YTH models.
• Brand/model: OEM part for Craftsman (under the Husqvarna-owned line) and Husqvarna tractors. Fits most 42” AYP/Husqvarna stamped decks. Verify your mower’s model number against the OEM compatibility list—common matches include 917-series Craftsman and 960-series Husqvarna.
• OEM vs aftermarket: This is an original Craftsman/Husqvarna part, not a third-party copy. Expect exact fit and durable plastic. Aftermarket versions are cheaper but may warp or crack faster.
• Measurements: The cover is roughly 12” x 6” x 4” (L x W x H) with a single-bolt mounting pattern. Check that the mounting hole aligns with your deck’s discharge opening (typically a 3/8” or 5/16” bolt).

Key Things to Know

• Installation difficulty: Easy—remove the side-discharge chute or bagger adapter, line up the cover, and secure with one bolt. No special tools needed.
• Quality: High-impact ABS plastic resists UV and cracking. Users report 3–5 years of regular use before fading or minor warping.
• Common gotchas:
  • The cover will NOT fit 46” or 54” decks—double-check deck size.
  • If your mower has a bagger, you must remove the bagger mounting bracket first.
  • For best mulching results, keep blades sharp and mow at a slower ground speed.
• Compatibility note: Some Craftsman models (e.g., LT1000) use a different cover shape—check your deck’s discharge opening design (curved vs. flat) before buying.

Should You Buy It

Buy this if you own a 42” Craftsman or Husqvarna tractor and want a reliable, OEM mulching cover that installs in minutes. It’s a solid upgrade for reducing bagging trips and leaving nutrient-rich clippings on the lawn. Skip it if your deck is a different size or you’re on a tight budget—aftermarket covers can save $10–15 but may fit less precisely.