John Deere Complete 42X Edge Extra Mower Deck Assembly - SKU25365

Part Number: 9039M
20 Review(s)
John Deere Complete 42X Edge Extra Mower Deck Assembly - SKU25365
John Deere Complete 42X Edge Extra Mower Deck Assembly - SKU24193
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Your Price: $670.00
John Deere Complete 42X Edge Extra Mower Deck Assembly - SKU25365
Usually available
Brand John Deere


John Deere Complete 42X Edge Extra Mower Deck Assembly

The 42-in. (107-cm) Edge Xtra Deck provides the performance advantages of a two-spindle mower in a wide 42-in. (107-cm) size.

  • A resilient 4-point mounting system
  • Wide anti-scalp wheels
  • Cut-height increments of 0.25 in. (6.4 mm)
  • Onboard deck-leveling system
  • Replaces the C-designation for use on Select Series Tractors
The strength of the deck is enhanced by the top-discharge design. A section of material below the discharge opening ties the front and rear of the deck together.

When using the rear bagger, material flows upward through the deck to provide highly effective bagging and a reduced chance of plugging. For this reason, no Power Flow is available for the 42-in. (107-cm) mower.

  • 42 In. Cutting Width
  • Two 0.67 In. Starlock Greaseable Spindles
  • Two Front 2.6 In. Wide Anti-Scalp Wheels
  • Wash Port
  • 4 Point Mounting
  • Adjustable Down Stop
  • 0.25 In. Cut Height Increments 
  • 1 to 4 In. Cutting Heights
Note: If a 42X or 42M Mower is installed on an X300 Series Tractor that was equipped with a 38X Mower, one M155044 right-hand/left-hand lift arm is required; the 38X Mower uses a unique right-side draft arm

Factory item - please allow a minimum of 14 days for shipping



  • California use info:

    ⚠ Warning: Cancer and Reproductive Harm -

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Customer Reviews

John Deere 300X owner
This Deck Assembly arrived ready for installation. With John Deere's 4 point mounting system on the 300X, I was able to remove the old deck and install the new deck in 90 minutes. I had never removed my deck prior to this repair. The new deck arrived 100% ready for installation. I only had to cut the two metal straps binding the deck to the shipping pallet. If you need to replace your old deck, this item is your solution.
Did you find this helpful?  21 of 25 Found Helpful
Reviewed by: (Verified Buyer)  from Mobile, AL. on 10/5/2016
This deck is the best thing going if you need a new deck. These decks are tough but after building a home in the middle of nowhere I hit many obstacles hidden by tall grass. I'd welded the original a couple of times but I was tired of repairing it. This new deck came with the the small scalping wheels, and the discharge chute in a separate box and had to be installed. Total install time for complete deck was probably about 40 min's. Another 15 min's to level properly (it took me several sequences to get level correct). This being a complete deck isn't cheap but purchasing thru Greenpartsstore the complete deck including new belt was less money than I could buy the deck shell from my local John Deere dealer in Stillwater, Ok. Great value in my opinion. I did call in and talk before purchase. The personal at Greenpartsstore were very helpful. I'll definitely buy parts here when need arises.
Did you find this helpful?  16 of 17 Found Helpful
Reviewed by:  from Orlando. on 9/9/2017
Works Great !!!
Perfect mower deck replacement for my 2007 X300 42". Exactly as described. Easy install. Beats the cost of a new John Deere! GPS was great to work with...good communication, fast & easy shipment to my home. Answered all my questions, and gave great advice. Glad I made the purchase.
Did you find this helpful?  7 of 7 Found Helpful
Reviewed by:  from Tennessee. on 9/24/2017
Arrived and mounted perfectly to my 300x
Did you find this helpful?  6 of 6 Found Helpful
Reviewed by:  from Wis. on 5/8/2017
Excellent Purchase, Very Happy.
The new factory deck arrived in excellent/perfect condition in one week !! Very fast shipping. Already installed on my X300 in less than one hour. I was able to sell my used deck for $100 on a Craigslist, had many interested buyers. My local JD Dealer wanted to charge me $430 to replace the spindles in my deck and they wanted $800 for just the deck shell alone, and they did not even offer the ability to purchase an entire new deck, who knows what the price tag on that would have been. THANK YOU GREEN PARTS STORE !! Would certainly purchase from you again !! Best Wishes !
Did you find this helpful?  4 of 4 Found Helpful
Reviewed by:  from Ocala, FL. on 8/13/2018
nice deck took about 1 hr to install and level went to try turn on clutch belt stater smoking and broke took deck back off and check all of the pulleys found the pulley under the belt tencher lock up so remove found bushing on the wrong side swap bushing around went got new belt put on works like a charm belt very costly $67.00
Did you find this helpful?  3 of 3 Found Helpful
Reviewed by:  from Lagrange. on 3/25/2019
X300 Mower Deck!
Outstanding value for what you receive. The deck came with literally everything for a complete change out including clips and pins and new front adjustment bar. Lawnmower sounds like new again and the cut is excellent. Communication with GreenPartStore was excellent and very happy I purchased through them. This took me three days to install. The first two days I was drunk and the third day I finally got around to it. Total install time if you are not drinking and never changed out a deck or leveled your lawnmower using basic hand tools is about 1 to 1.5 hours and that is if you are very diligent on your install. ;-)
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from MADISONVILLE. on 5/16/2022
John Deere owner
Extremely satisfied. Deck arrived and immediately installed and used. It was everything as advertised.
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from Lacombe. on 6/22/2021
Right part, great price
Purchased the mower for an X300 lawn tractor for hundreds less than what I was quoted for just the bare pan here locally. Even though I had to pay freight to ship it, I still came out hundreds ahead.
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from Eustis. on 5/5/2020
X300 Deck
Great price considering my local John Deere dealer wanted a $1000 for just an empty shell. Deck came packaged very well and secure.
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from Leighton, Al. on 4/19/2019
Fast shipping product as described would buy from again
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from Sd. on 5/9/2018
JD X 300 mower deck
This mower deck is the real thing for my X300. Fits perfectly and is quality deck. It has also an improved shut over the original.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Westport MA. on 5/14/2022

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