John Deere X300 Series Lawn Tractors

The John Deere X300 Series includes lawn tractors with different steering, deck and lift arrangements. Choose the configuration around the mowing route and the work it must do, then identify the actual tractor before ordering attachments or service parts. A series name alone does not establish compatibility.

This guide uses US Deere documents for named configurations. Older X310 and X320 tractors need their own manuals and parts selection; specifications from a newer X350 should not be transferred to them.

Compare the X300 models by the controls you need

Steering and deck lift are separate choices

These examples come from Deere’s May 2026 US X300 specifications. They describe the listed configurations, not every tractor carrying the same model badge.

Four-wheel steering describes which wheels steer; power steering describes assistance at the steering wheel. Neither term means four-wheel drive. Compare both controls during a demonstration instead of treating one model number as a guarantee of easier operation.

Measure the route before choosing a deck

Record the narrowest gate opening, space beside sheds and the turns around permanent beds. Ask for the assembled width with the required discharge or collection equipment in place. Nominal cutting width is not the tractor’s clearance measurement.

For a used tractor, photograph:

• the tractor identification number;
• engine label;
• deck identification.

Put those pictures beside the seller’s description. An engine or deck replacement can change which parts are required, even when the hood badge is unchanged.

Identify the engine before buying service parts

Keep the engine record with the tractor record

Write down the installed engine’s model and identification codes, the manual edition and any replacement-engine details. Use the engine label to resolve a mismatch between an advertisement, an old invoice and the current machine.

Check the fuel system on the actual X350

Do not assume an X350 has electronic fuel injection. Deere lists X350 among the general applications for its AUC21179 carburetor. The parts page requires equipment selection to check fit. Match fuel-system repairs and service parts to the identified engine rather than treating EFI as a series-wide option.

Try the controls before committing to a tractor

During an authorized demonstration, check whether the operator can comfortably use:

• the travel pedals;
• brake;
• parking brake;
• steering;
• deck-lift control.

Have the seller explain the controls and provide the applicable operator’s manual. A hydrostatic transmission description does not establish a towing allowance or slope capability.

Check comfort, cutting setup and condition

Inspect the seat and operating position

Adjust the seat on the stationary machine as instructed. Check pedal reach, visibility and access to the controls. Record damaged upholstery, loose mountings or a control that does not operate correctly; a high seat back or an optional armrest does not prove that the tractor fits its next operator.

Separate a height setting from a level deck

Use the tractor and deck instructions to check tire pressure, cutting-height setup and leveling. Uneven cutting is a reason to inspect the setup and condition, not an automatic reason to buy new blades. Follow the prescribed shutdown, isolation and access procedure before working near the deck.

Measuring and inspection supplies

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  Komelon Self Lock 25-foot tape.

  Record gate and storage openings before comparing assembled mower dimensions. Keep the measurements with the configuration being considered.

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• 

  John Deere AM130907 deck-leveling gauge.

  Deere's X350 42-inch maintenance sheet lists this gauge. Use the deck's leveling procedure; the gauge does not identify a worn or damaged component.

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• 

  Ullman HTC-2 inspection mirror.

  A small mirror for reading an awkwardly placed label on a shut-down machine. Access restrictions and the inspection procedure still apply.

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Match attachments to the complete tractor and deck

Build the collection or mulching package as a system

Choose side discharge, mulching or collection before pricing parts. Have the supplier identify the complete package for the tractor and deck, including:

• the chute or blower;
• hopper;
• mounting hardware;
• any required ballast.

A used hopper or a set of mulching blades is not proof of a complete conversion.

Distinguish an X350 with an added rear collection system from an X350R. Deere documents the X350R’s 42-inch rear-discharge deck separately. Similar-looking collection equipment should not be used to infer interchangeability.

Confirm seasonal equipment before purchase

For a proposed snow implement or cart, obtain the tractor and attachment instructions and a written list of required components. Check these together:

• model and serial applicability;
• mounting parts;
• operating limits;
• storage access.

Do not assume that a front loader, tiller or another attachment fits because a seller calls it an X300 accessory.

Create an X350 service list without overbuying

Use the exact configuration’s parts sheet

Deere’s X350 with 42-inch Accel Deep maintenance sheet lists LG265, AM125424, AM116304, MIU12554 and MIU12555. Confirm the installed engine and current parts selection before ordering. This is an X350 configuration reference, not a fit list for every X300 model.

Service choices for a confirmed X350 application

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  John Deere LG265 maintenance kit.

  A kit option after the engine application and current package contents are checked. Compare its contents with parts already on hand before adding separate filters.

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• 

  John Deere AM125424 oil filter.

  An individual replacement when the confirmed service plan calls for this reference. Check whether a selected kit already includes it.

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• 

  John Deere AM116304 fuel filters, two-pack.

  The Amazon listing describes two filters. Verify the reference and package quantity; a spare in the pack does not change the service schedule.

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• 

  John Deere MIU12554 foam precleaner.

  Match this outer foam component to the actual air-cleaner assembly. It is a separate item from the paper filter element.

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  John Deere MIU12555 air-filter element.

  The paper element listed with MIU12554 in the X350 sheet. Check both references and existing kit contents before placing an order.

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Record service hours and unresolved faults

Use the applicable operator’s manual for service intervals, fluid specifications, adjustment procedures and storage preparation. Keep a dated record of:

• hours;
• parts;
• work performed.

Do not substitute a universal 50-hour rule, fuel-draining instruction or battery-storage routine for that schedule.

Make the final X300 comparison

Shortlist a configuration only after recording the route measurements, preferred steering and lift controls, tractor/engine/deck identifiers and complete attachment package. Ask the seller to resolve missing records or equipment faults before purchase. This gives the comparison a concrete basis without promising a service life, mowing time or terrain capability that the records cannot establish.