For a used John Deere X340, start with the engine marking, the deck identification and the condition of the complete machine. Record those details before comparing parts listings.
Inspecting the X340 frame and operator area
Look over the frame, mounting points, seat adjustment and controls together. Inspect visible wear under the bodywork as well as the finish. Ask to see repairs and confirm that covers, guards and lights are present before deciding what work the tractor needs.
X340 engine identification
Deere’s home-maintenance cross-reference updated November 21, 2019 pairs X340 engine FH721V with kit LG249. This row prints no tractor-serial range. Match the actual engine marking before using that reference; an engine replacement needs its own parts identification.
Equipment & supplies
X340 maintenance kit for the documented engine
The November 2019 table links FH721V to LG249 without a tractor-serial range. Deere’s August 2021 X340 42-inch Mulch reminder identifies LG249 for Canada/US and AUC17080 elsewhere. Confirm the actual engine, market, current kit and package; there is no verified AUC17080 offer here.
John Deere LG249 maintenance kit
LG249 is Deere’s November 2019 X340 reference for FH721V. The August 2021 reminder limits this kit row to Canada/US. Read the installed engine marking and confirm current application and contents; neither the X340 badge nor a replacement engine proves fit.
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Deck and accessory identification
Read the installed deck label before choosing blades, belts, collection equipment or other accessories. Photograph its mounting and drive arrangement. Treat an attachment offered separately as another compatibility check, including its required mounting hardware and documentation.
Checking the operator fit
With the tractor stopped as prescribed by its manual, check seat adjustment and whether every control is within comfortable reach. A seller demonstration should follow the applicable manual. Record sticking controls, unusual vibration or lighting faults for inspection.
Equipment & supplies
X340 individual service parts to check
The August 2021 X340 42-inch Mulch sheet lists these engine-service references. Identify the fitted engine and confirm current application and quantity. Compare the kit’s actual contents first so that separate parts are not ordered twice. Use the applicable manual for the work.
AM116304 fuel filter
Deere’s August 2021 X340 reminder lists inline fuel filter AM116304. Confirm the current reference against the installed engine before purchase and follow its fuel-service precautions. This Amazon listing is a two-pack; check the seller’s current package.
John Deere M805853 spark plugs — two-pack
M805853 is the spark-plug reference on the August 2021 X340 sheet. Match the installed engine and its current specification, service method and required quantity before ordering. This offer is a two-pack; avoid duplicating plugs already supplied in a kit.
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Maintenance and Care Tips
Use the manual matching the installed X340 engine to establish oil, filters, quantities, intervals and the service procedure. LG249 is a historical kit reference for the FH721V row; it is not a complete maintenance schedule. Record completed work and keep deck service separate from engine service.
Equipment & supplies
A leveling check for the identified X340 deck
Deere’s August 2021 X340 42-inch Mulch reminder lists AM130907 as a deck-leveling gauge. Confirm the deck actually present and follow its manual. A documented gauge does not establish that this tractor has the sheet’s deck or identify every cause of an uneven cut.
John Deere AM130907 deck-level gauge
The August 2021 X340 42-inch Mulch sheet names gauge AM130907. Verify the fitted deck and current reference, then use the applicable measuring and adjustment procedure. The gauge alone does not supply the required setting or complete a fault diagnosis.
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X340 pre-purchase checklist
- Engine marking: Photograph the FH721V marking if present; investigate a different or unreadable engine before buying service parts.
- Starting and operation: Ask for a start and demonstration under the applicable manual, then note smoke, leaks and control response.
- Deck condition: Record the deck model, visible damage, guards and the parts included with any collection equipment.
- Maintenance records: Compare receipts with the installed engine and ask which filters, belts and other wear parts were changed.
- Operator area: Check seat adjustment, controls, lights and safety equipment without bypassing an interlock.
- Purchase scope: Write down the tractor, deck, attachments, keys and manuals included in the agreed offer.
Equipment & supplies
Workshop supplies for the fitted X340 equipment
Choose supplies around the procedure in the installed engine and tractor/deck manuals. Check drain access, fastener size and task-specific protection; follow isolation and disposal instructions. These general tools do not establish X340 parts compatibility.
FloTool 42003MI oil drain container
Measure the clearance at the fitted X340 engine’s drain point before using a FloTool 42003MI 16-quart container. Confirm access and collection capacity for the manual’s procedure, then follow local used-oil disposal requirements.
GEARWRENCH 80550 socket set
Choose an 80550 SAE or metric socket only after matching the fastener on the actual X340 equipment. The service manual determines tightening method and torque; the set does not provide a model-specific torque setting or establish impact-tool suitability.
DEWALT DPG82-11 clear safety goggles
For suitable X340 dust- or debris-producing maintenance work, compare the DPG82-11 goggles’ protection markings with the job’s requirements. Check their condition and select other protection when needed; chemical-splash protection is not established here.
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Comparing complete X340 offers
Compare tractors with the same documented equipment and a written list of included parts. Price the missing hardware and needed repairs separately.
Source: . The table documents historical applications, not current kit contents or service procedures.
I had an issue with mine last month, but customer service was super helpful! They walked me through troubleshooting over the phone. It’s nice to know they have your back! 👍
Thanks for sharing, Kevin! We always strive for excellent customer service.
That’s good to hear! I’ve heard mixed reviews about customer service, so it’s nice to see some positive experiences.
I’m on the fence about getting the X340. I’ve heard great things, but my neighbor says it’s overpriced. Can anyone share their long-term experience? How’s the maintenance?
Great question, Tom! The X340 is built to be user-friendly when it comes to maintenance.
I’ve had mine for over 2 years now, and maintenance is super easy! Just regular oil changes and keeping the blades sharp. 😊 Definitely worth it!
I just bought the John Deere X340 last month, and I’m honestly in love! 😍 The design is sleek, and it cuts my lawn like a dream. I was worried about the price, but after using it, I can say it’s totally worth it. My husband was skeptical, but now he wants to mow the lawn every weekend. 😂 Anyone else in love with this tractor?
Haha, I relate! My wife was the same way. Now it’s like a competition to see who can mow better! 😄
Thanks for sharing, Sarah! We love to hear how the X340 is making lawn care enjoyable.
Are there any good accessories for the X340? I want to maximize its use for the fall season. I heard about some leaf collection attachments. Anyone tried those?
I’ve seen those! They work great for leaves. I’m planning to get one myself.
Yes, Jessica! There are several accessories that enhance functionality, including leaf collection systems.
I’m impressed with the engine performance! I’ve used it for a few weeks now, and it starts every time with no hiccups. It’s also fuel-efficient! What’s not to love?
Agreed! I’ve noticed the same. My gas bill is lower than what I expected. Win-win! 💰
Thanks for sharing, Dave! Engine performance is a key selling point for the X340.
Honestly, I think the X340 is overrated. The cutting system is good, but I expected more power for the price. It gets the job done, but I was hoping for something a bit more robust. Anyone else feel this way?
I can see your point, Emily. It’s solid, but not a powerhouse for sure. I think it’s more for regular homeowners, not heavy-duty use.
Thanks for your feedback, Emily! It’s important to weigh expectations with the specs.
Just got my X340 last week! The user-friendly controls are amazing. I was worried I’d have trouble figuring it out, but it’s as easy as pie! 🍰 I even let my teen try it, and he did fine!
Happy to hear that, Carlos! The user-friendly design is one of the highlights of the X340.
That’s awesome, Carlos! My dad’s been using it, and he loves how intuitive it is too.
I’m considering the X340 because I have a large yard. How does it handle uneven terrain? My yard is a bit of a rollercoaster! 😂
It handles it pretty well, Rachel. Just take it slow on the slopes, and you should be fine.
Great question, Rachel! The X340 is designed for versatility, even on uneven ground.