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Home / Lawn and Garden Tractors / John Deere Lawn Tractors / John Deere X107

John Deere X107 Troubleshooting

The John Deere X107 is a two-wheel drive lawn tractor from X100 series. This model was manufactured from 2021 to 2025. The driveline consists of 000 cu.in (0.0 L) Briggs and Stratton 31R977 Intek 4-cycle single cylinder OHV vertical shaft air-cooled gasoline engine with a rated power of 14.9 Hp (11.2 kW), and belt-driven hydrostatic transmission with infinite forward and reverse gears.

The John Deere X107 is equipped with a manual steering system, mechanical PTO clutch, disc brakes, 15x6.00-6 front tires, and 20x8.00-8 rear tires. The operating weight is 425 lbs (192 kg). The John Deere X107 tractor is compatible with the following attachments: 42" mid-mount 2-blade mower deck with a mechanical lift system, 44" front-mount 1-stage snow blower, and 46" front blade.

Engine Troubleshooting
Engine starts hard or will not start
Empty fuel tank - Add gasoline
Wrong grade of gasoline - Change gasoline
Air in fuel tank - Bleed fuel tank
Loose or disconnected spark plug wire - Inspect the spark plug wire connection, replace or repair
Spark plug is faulty - Spark plug need to be replaced
Fuel filter is dirty - Replace fuel filter
Faulty safety switch - Change damaged switch
Carburetor components worn out - Repair or replace parts
Poor cylinder compression - Check cylinder block and change worn parts
Choke cable is damaged or not adjusted properly - Adjust properly or replace the cable
Unstable engine running
Clogged cooling fins - Need to clean or wash
Ignition failure - Check ignition system and replace faulty parts
Faulty or stuck choke cable - Change or clean the cable
Air filter element is clogged - Service or replace air filter
Dirty or defective fuel pump - Check fuel pump and change if required
Engine starts and stops immediately
Defective spark plug - Change spark plug as required
Defective or dirty carburetor - Clean or replace carburetor
Ignition coil is defective - Ignition coil should be replaced
Valve springs are broken or bad - Install new valve springs
Valves are stuck - Service the valves
Engine keeps overheating
Engine oil insufficient - Check oil level and add oil as required
Engine is under excessive load - Reduce the load
Clogged cooling fins - Need to clean or wash
Carburetor fuel mixture is too lean - Adjust carburetor properly
Ignition timing is improper - Adjust ignition timing correctly
Valve setting is wrong - Set the valves correctly
Abnormal engine noise or knocking
Low octane fuel - Use proper fuel
Engine overload - Reduce engine load
Engine oil level is low - Checking oil level and add if necessary
Low idle speed setting is not correct - Correct idle adjustment
Fuel pump is clogged or faulty - Service or replace fuel pump
Worn crankshaft or main bearings - Replace crankshaft or bearings
Valve clearance is not correct - Check and adjust
Cylinder bore or piston rings are damaged - Replace faulty parts
Lack of engine power
Carburetor is incorrectly adjusted or clogged - Adjust carburetor properly or service it
Air filter is blocked - Replace or service air filter
Dirty or defective fuel pump - Clean or replace fuel pump
Ignition failure - Inspect ignition system and change faulty parts
Damaged cylinder-head gasket - Install new head gasket
Valves are stuck or burned - Clean or replace valves
Push rod is worn or damaged - Push rod should be replaced
Damaged cylinder block components - Defective components need to be replaced
Excessive fuel consumption
Choke doesn't open well - Adjust or replace choke cable
Incorrect carburetor main jet adjustment - Adjust the carburetor main jet correctly
Loose or defective spark plug - Spark plug need to be replaced or tightened
Stuck, burned, or worn valves - Service or change valves
Worn sleeve, piston, or rings - Replace faulty parts as required
Valve clearance is incorrect - Adjust valve clearance
Engine using too much oil
Seals or gaskets are defective - Install new components
Damaged valve stems or valve guides - Replace the valves
Damaged or seized piston rings - Have piston rings replaced
Worn piston or cylinder liner - Check piston and liner, change as required
Breather pipe or hose is plugged - Service or replace

Hydrostatic Transmission Troubleshooting
Hydrostatic transmission noises
Speed control linkage is worn or unadjusted - Adjust or replace linkage
Excessive loading - Load needs to be reduced
Fluid is contaminated or fluid level is insufficient - Fill to required level or change the fluid
Defective or worn transmission parts - Replace or repair defective components
Hard shifting
Shift linkage is loose or broken - Service or change the linkage
Hydrostatic pump is faulty or seized - Change or repair pump
Transmission shift control parts are faulty or unadjusted - Change or adjust correctly
Power is too low
Insufficient transmission oil - Fill the transmission housing to proper oil level
Worn or damaged drive sheave - Install a new sheave
Shifting linkage is broken or misadjusted - Replace or adjust linkage
Speed control linkage is worn or unadjusted - Replace or adjust linkage
Transmission leaks
Damaged transmission seals or gaskets - Change gaskets or seals
Final drive shaft leaks - Change shaft seals
Transmission case is cracked - Install a new transmission case

Mower Deck Troubleshooting
Mower vibrates too much
Drive pulley of mower deck is damaged or dirty - Change or clean pulley
Drive belt is loose or defective - Install a new belt or adjust belt tension
Unbalanced or warped mower blades - Change or balance blades
Blade bolts are not tightened well - Tighten it fast
Discharge chute is regularly plugged
High ground speed - Select a slower speed
Tall grass - Need to set low cutting height
Engine runs at low revs - Open throttle fully
Mower deck set to low cutting - Adjust mower to higher cutting height
Incorrect mower drive belt installation - Install drive belt correctly
Mower leaving random uncut of grass
Discharge chute is plugged - Need to clean the mower deck
Blades are too dull - Blades need to be sharpened
Worn or defective blades - Install new blades
Mowing speed is too high - Use a slower speed
Cutting level is too low - Use correct cutting height
Full bagger - Remove grass from bagger
Blades are scalping the grass
Lawn is uneven or bumpy - Lawn needs to be leveled
Cutting level is too low - Adjust mower to higher cutting height
Mowing speed is too high - Select a lower speed
Improperly leveled mower deck - Adjust mower deck level properly
Worn or bent blades - Install new blades
Tires are not properly inflated - Inflate tires as required
Uneven cutting
Low tire inflation - Correct tire pressure
Deck level is not correct - Deck should be adjusted correctly
Blades are excessively dull - Sharpen the blades
Blades are worn or damaged - Blades need to be replaced
Discharge chute is plugged - Need to clean the mower deck
Broken mower deck housing - Repair or change the deck
Mower spindle is loose or defective - Spindle needs to be repaired or replaced

Electrical Troubleshooting
Battery does not charge
Loose or corroded cable connections - Tighten or clean electrical wiring connections
Battery terminal connectors are faulty - Change terminal connectors
Worn-out battery - Change the battery
Starter turns slowly
Low battery voltage - Charge the battery
Battery will not hold charge - Battery needs service or replacement
Bad battery terminals or disconnected wiring - Check wire connections and change or service terminals
Starter is not cranking
Battery is drained or defective - Need to charge or replace the battery
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required
Low battery power - Battery is drained, charge it
Incorrectly gapped or worn spark plug - Clean and gap or replace
Damaged starter motor or solenoid - Repair starter or change solenoid

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