Caltric 42" Deck Mulch Cover Compatible With John Deere Sabre 14.542GS 1642HS 17.542HS D100 D105

What It Is

This is an aftermarket mulch cover kit for 42-inch cutting decks, designed to replace the OEM discharge chute on select John Deere Sabre and 100-series lawn tractors. It blocks grass clippings from exiting the deck, forcing them to recirculate and cut finer for mulching.

Fitment & Compatibility

• Deck size: Requires a 42-inch stamped or fabricated deck (measure blade tip-to-tip or deck shell width).
• Compatible models: John Deere Sabre 14.542GS, 1642HS, 17.542HS, and 100-series D100, D105, D110, D120, D125, D130, D140, D150, D155, D160, D170. Also fits some LA-series and L-series with 42" decks.
• OEM cross-reference: Replaces John Deere part #GY21132, #GY20766, or #GY20938.
• Before buying: Verify your deck has two mounting holes at the discharge opening (about 4.5 inches apart). Measure the opening width—it should be roughly 12 inches. Check that your deck doesn’t have a curved or angled discharge flange that might interfere with the cover seal.

Key Things to Know

• Build quality: Caltric uses blow-molded plastic that’s lighter than OEM, but some users report it’s slightly thinner and may warp in extreme heat. The included foam seal strip helps reduce leak, but it may not be as snug as OEM.
• Installation: Simple bolt-on with two existing deck holes. No drilling or modification needed. Tighten bolts just snug—overtightening can crack the plastic.
• Common gotcha: On some D-series decks, the cover may contact the blade tips if the deck isn’t level. Check blade clearance (at least 1/2 inch) before mowing.
• Mulching performance: Works best with high-lift mulching blades (sold separately). Standard blades leave larger clippings.

Should You Buy It

If you have a compatible John Deere 42" deck and want to convert to mulching without buying OEM parts, this is a solid budget option at $22. It’s fine for occasional mulching on flat, dry lawns, but professionals or those with heavy, wet grass may prefer a sturdier OEM cover. Check your deck measurements and blade clearance before ordering.