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John Deere LX188 Troubleshooting

John Deere LX188 Engine Problems

Engine will not start

Gas tank is empty - Fill it up.
Wrong grade of gasoline - Use correct gasoline grade.
Stale gasoline - Drain gasoline and add fresh.
Dirty fuel lines - Inspect and clean.
Spark plug defective - Check the spark plug wires.
Spark plug not working - Check ignition spark.
Clogged fuel filter - Fuel filter needs changing.
Faulty safety switch - Change damaged switch.
Carburetor is not adjusted - Check carburetor float adjustment.
Inspect starter cranking speed RPM. Check the Valves and Compression System.

Gas engine hard to start

Spark plug failed - Inspect the spark, replace if necessary.
Carburetor is dirty - Wash, clean and adjust.
Fuel lines are clogged - Clean fuel system components.
Throttle cable damaged - Change the cable.
Stale or incorrect gasoline - Pour quality fuel.
Loose or corroded electrical connections - Inspect and change wires if required.
Failing starter - Inspect the starter and change defective parts.

Rough running engine

Cooling fins blocked - Clean and wash cooling fins.
Loose electrical contacts - Check and repair defective connections.
Ignition adjustment lost - Test ignition and spark plug.
Throttle cable sticks - Check and replace.
Air filter element clogged - Change air cleaner.

Engine misses

Spark plug failed - Test spark plug.
Carburetor problems - Test and repair.
Ignition coil air gap incorrect - Check and adjust ignition coil air gap.

Engine overheating

Engine runs under excessive load - Reduce loads.
Air intake screen blocked - Clean clogged components.
Too much or too little oil - Inspect oil level.
Poor quality oil - Change engine oil.
Inspect crankshaft to main bearing clearance.
Fast idle speed - Adjust carburetor idle mixture screw.

Engine will not idle

Poor spark plug contact - Tighten the spark plug correctly.
Spark plug failed - Inspect the spark, change if necessary.

JD LX188 Engine knocks

Stale gasoline - Use correct gasoline.
Excessive engine load - Reduce loads.
Low oil level - add oil as required.
Engine speed too low - Adjust carburetor.
piston rings or cylinder bore damaged - Check cylinder bore and rings for wear.
Inspect for engine overheats from clogged cooling fins.
Checking and adjusting valve clearance.
Checking for wear crankshaft or camshaft bearings.

Engine backfires

Inspect spark plug and change if required.
Adjust or replace throttle.
Test carburetor, adjust if necessary.
Inspect and adjust ignition coil air gap.
Check for sticking valves.
Checking and adjusting valve clearance.
Inspecting flywheel key.

Insufficient engine power

Engine overheats - Change air filter.
Engine oil overfilled - Drain excess oil.
Fuel pump is damage - Inspect and repair fuel pump.
Faulty governor - Inspect and adjust governor.
Check carburetor float adjustment.
Test engine compression.

Excessive fuel consumption

Throttle did not open fully - Inspect choke cable.
Carburetor is not adjusted - Check carburetor float adjustment.

Black exhaust smoke

Air filter is dirty or oil soaked - Check and clean.
Choke partially engaged - Inspect and adjust choke.
Check for correct main jet for elevation.

John Deere LX188 Electrical Troubleshooting

Starter does not run

Main fuse defective - Install new fuse.
Poor terminal connection - Clean terminals.
Battery is discharged - Charge the battery.
Ignition lock problems - Change switch.
Starter is damaged - Change the starter.
Wiring damage - Replace wiring.

Battery does not charge

One or more battery cells dead - Fit new battery.
Battery terminals and cables are dirty - Clean or replace cable.

Lights do not work

Light plug defective.
Bulbs defective.
Inspect electrical wires for short- circuit.

JD LX188 Machine Troubleshooting

Excessive tractor vibration

Equipment driven belt worn out - Inspect and change damaged belt.
Traction drive belt damage - Install new belt.
Dirt on drive sheaves - if required.
Bent cutting blade or no balance - Change defective blades.

The engine is running but tractor is not moving

Parking brake locked - Release the parking brake.
Bypass valve lever activated - Deactivate the bypass valve.
Blades loose - Fasten the blades securely.
Incorrect blade balance - Inspect the blades and balance if necessary.
Too little transmission oil - Pour oil as required.

John Deere LX188 Mower Deck Troubleshooting

Discharge Chute Clogged

Speed too high - Do not use high speed.
Too high grass for mowing - Use a shorter cutting height.
The grass is wet - Wait until later to cut.
Engine is running at too low speed - Open choke wide.
Restricted air flow - Adjust to high revs.
Cutting too low - Adjust cutting settings.
Belt is loose - Reinstall the belt properly.

Streaking of uncut grass

Clog in discharge area - Mower deck needs cleaning.
Defective blade - Installing new blade.
Mower deck low - Checking and adjust deck height.
Bagger too full - Clean grass bag.
Ground speed too fast - Use slower speed.

Belt slips

Pulley is dirty - Need to clean the pulley.
Drive belt damage - Install new belt.
No belt tension required - Install the belt correctly.

Excessive mower vibration

Mower clogged or in pulleys - Remove clogging from mower deck or sheaves.
Worn pulley or belt - Change damaged parts.
Belt or pulleys out of alignment - Check and align.
No blade balance adjustment - Balance blades properly.

Blades scalping grass

Cutting height too low - adjust cutting height.
Mower wheel height incorrect - Adjust rear or front wheel height.
Low tire inflation - Increase tire pressure.
Higher blade speed - Correct blades speed.
Bent blades during operation - Remove bent blade and install new one.

Uneven cutting results

Mower deck not level - Level mower deck.
Low tire inflation - Need to inflate tires.
Incorrect rollers height - Check wheel adjustment.
Traveling too fast - Use slower speed.
Blades blunt - Checking for blade fault and change if required.

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