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John Deere LX266 Lawn Tractor Problems

John Deere LX266 Engine Troubleshooting

Kohler engine fails to start

No gasoline in tank - Add fuel.
Improper fuel grade - Change fuel.
Stale gas - Drain fuel and replace with fresh fuel.
Dirty fuel lines - Inspect and clean.
Plug connection defective - Check wires connection.
Spark plug damaged - Replace as required.
Fuel filter is clogged - Fuel filter needs to be replaced.
Brake pedal not pushed down - Push the brake pedal down.
Carburetor is not working properly - Inspect and adjust.
Test fuel transfer pump output. Test crankcase vacuum.

Engine long starting

Spark plug wear - Inspect the spark, replace if necessary.
Carburetor incorrectly set - Set carb correctly.
Clogged fuel lines - Clean fuel system components.
Throttle cable worn - Install new throttle cable.
Stale or incorrect fuel - Drain and add proper gasoline.
Electrical connection problems - Check and replace.
Failing starter - Test starter and repair if necessary.

Engine runs roughly

Cooling fins plugged - Clean and wash cooling fins.
Electrical contacts are damaged - Check and replace damaged connections.
Ignition system problems - Check ignition and adjust if necessary.
Choke cable sticks - Check and repair.
Air filter element clogged - Replace air cleaner.

Engine stops or misses

Spark plug wear - Change spark plug.
Carburetor problems - Test and repair.
Ignition coil defective - Test ignition coil and replace if necessary.

Kohler engine overheats

Engine runs under excessive load - Reduce the load.
Air intake screen blocked - Clean dirty components.
Engine oil high or too low - Inspect oil level.
Incorrect engine oil viscosity - Change engine oil.
Inspect crankshaft to main bearing clearance.
Idle speed problems - Adjust fast idle.

Engine doesn't idle speed

Spark plug is loose - Adjust spark plug gap.
Spark plug fail - Test spark and replace as required.

Engine knocks

Stale or low octane fuel - Use correct gasoline.
Engine overloaded - Reduce the load.
Oil level low - Add to required level.
Engine speed too low - Adjust carburetor.
piston rings or cylinder bore damaged - Replace defective components.
Inspect for engine overheats from clogged cooling fins.
Checking and adjusting valve clearance.
Check for loose or worn connecting rods.

Kohler engine back-fire

Checking spark plug.
Adjust or replace choke.
Checking and adjusting carburetor.
Inspect and adjust ignition coil air gap.
Inspect inlet and outlet valves.
Test valve clearance, adjusting if necessary.
Check flywheel key.

Loss of power

Engine overheating - Check air cleaner for plugged condition.
Overfilling engine oil - Remove excess oil.
Fuel pump broken - Test fuel pump output.
Faulty governor - Repair or replace governor.
Inspect carburetor for plugged passages.
Test engine compression.

Engine uses too much fuel

Throttle did not open fully - Check throttle cable.
Carburetor is not adjusted - Adjust or repair carburetor.

Black smoke is emitted during operation

Air filter element clogged - Inspect and clean.
Choke not fully engaged - Inspect and adjust throttle.
Check and adjust carburetor float level.

John Deere LX266 Electrical System Troubleshooting

Starter does not run

Blown main fuse - Check and replace.
Terminals are severely corroded and heat up - Inspect and clean terminals.
Weak battery - Battery charging required.
Ignition switch is damaged - Change the lock.
Starter fault - Install new starter.
Wiring disconnected - Connect wires.

Battery does not charge

Battery cells defective - Install new battery.
Bad contact between battery pole and cable - Check and Clean.

No Lights work

Light plug disconnected.
Bulbs defective.
Wiring damaged - Check and replace.

John Deere LX266 Machine Troubleshooting

Tractor vibrates too much or rattles excessively

Attachment drive belts worn or damaged - Check and change worn belt.
Worn traction drive belt - Check and replace belt.
Drive sheaves are dirty - Clean the sheaves.
Unbalancing or bending of blades - Change damaged blades.

The engine is running but tractor is not moving

parking brake blocks the tractor - Release the park brake.
Bypass lever is on - Set bypass valve to the off position.
Blades loose - Checking blades for loose bolts.
Unbalance in one or both blades - Balance the blades correctly.
Low transmission oil - Pour oil as required.

John Deere LX266 Mower Deck Problems

Clogged discharge chute

Speed too high - Need to reduce speed.
High grass - Use a shorter cutting height.
The grass is wet - Wait until later to cut.
Low engine speeds - Open choke fully.
Lack of air flow - Check engine rpm.
Mower cuts too low - Adjust to higher cutting.
Belt is loose - install belt as required.

Streaking of uncut grass

Clog in discharge area - Check cutting deck and clean if necessary.
Excessive blade wear - Inspect and fit new blade if required.
Deck too low - Adjust and level the deck height.
Bagger too full - Empty the grass bag.
Speed is very high - Need to reduce speed.

Belt Slipping

Dirt in the sheaves - Clean or replace.
Belt is damaged - Check and replace belt.
Poor belt tension - Belt tension needs to be adjusted.

Excessive mower vibration

Debris in mower deck or in pulleys - Remove debris from deck or pulley.
Belt or sheaves faulty - Change defective parts.
Belt or sheaves out of centering - Check and align.
Blades are not balanced correctly - Balance blades correctly.

Blades scalp grass

Cutting height incorrect - Set the proper cutting height.
Mower rollers not adjusted improperly - Adjust front or back wheel height.
Tire pressure is uneven - Increase tire pressure.
Higher blade speed - Balance mower speed.
Bent mower blades - Remove bent blade and install new one.

Uneven cutting results

Mower deck low - Level mower deck.
Tire pressure uneven - Need to inflate tires.
Wheels not positioned correctly - Adjust front or back wheel height.
Speed too high - Use slower speed.
Mower blades dull - Check and replace the blade.

JOHN DEERE TRACTORS ATTACHMENTS
420	430	455	790	990
X300	X320	X330	X350	X475
X485	X500	X540	X570	X590
X700	X720	X738	X758	1023E
2025R	2210	2520	3025E	3032E
3038E	3038R	3039R	3046R	3203
3320	3520	4052R	4066R	4100
4105	4115	4200	4310	4320
4400	4410	4520	4600	4720

JD TRACTORS TROUBLESHOOTING
2640	3040	3310	3650	4100
5050D	5090R	5410	6105R	7200R
E130	L111	LA110	LT155	X300R