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Husqvarna LT126 Troubleshooting
The
Husqvarna LT126 lawn tractor was manufactured from 2009 to 2013. The Husqvarna
LT 126 is powered by 2 engines: a 21.1 cu.in (344 cc) Briggs and Stratton 21R707
Intek 4-cycle single cylinder OHV vertical shaft air-cooled gasoline engine with
a rated power of 11.5 hp (8.5 kW), or 21.1 cu.in (344 cc) Briggs and Stratton
219807 Power Built 4-cycle single cylinder OHV vertical shaft air-cooled
gasoline engine with a rated power of 12.5 hp (9.3 kW).
The Husqvarna LT126 is fitted with a Peerless 206-565 machanical
transmission with 6 forward and 1 reverse gears. Max travel speed
(forward/reverse): 4.5 mph (7.2 km/h) and 1.6 mph (2.6 km/h). The
tractor is equipped with a manual steering system, pneumatic wheels,
13x5.00-6 front tires, and 16x6.50-8 rear tires. The wheelbase is 46.8"
(1190 mm).
The Husqvarna LT 126 is compatible with a 30" mid-mount 1-blade side
discharge mower deck with cutting height of 0.8-3.2" (20-80 mm), 6 cut
positions, manual blade engagement, and mechanical lift system.
| Engine Troubleshooting |
| Engine doesn't start or hard to start |
| Gas tank is empty - Fill fuel up |
| Improper fuel grade - Change fuel |
| Air in the fuel system - Air bleeding |
| Spark plug wire is disconnected or loose - Check spark plug wiring connection, repair or change |
| Spark plug is faulty - Change spark plug as required |
| Fuel filter is clogged - Change fuel filter |
| Brake pedal not depressed - Press the brake pedal |
| Carburetor not adjusted - Adjust according to instructions |
| Weak cylinder compression - Inspect cylinder block and change worn parts |
| Throttle cable is adjusted incorrectly or damaged - Change cable or adjust correctly |
| Air intake screen is blocked - Need to clean or wash |
| Ignition system is defective - Check ignition and replace faulty components |
| Stuck or defective choke cable - Change or service the cable |
| Clogged air filter - Change or service air filter |
| Dirty or faulty fuel pump - Clean or change fuel pump |
| Engine starts but then shuts off |
| Defective spark plug - Change spark plug as required |
| Carburetor is faulty or clogged - Clean or change carburetor |
| Defective ignition coil - Install a new ignition coil |
| Valve springs are worn or loose - Replace valve springs |
| Valves are stuck - Valves need to be cleaned |
| Low engine oil level - Check oil level and add oil as required |
| Engine is running overloaded - Load reducing required |
| Cooling fins are blocked - Need to wash or clean |
| Too lean carburetor mixture - Adjust carburetor correctly |
| Bad ignition timing - Adjust ignition timing correctly |
| Valve setting is wrong - Valves needs to be adjusted properly |
| Stale or low octane fuel - Use correct fuel |
| Engine is overloaded - Load reducing is recommended |
| Engine oil level low - Checking oil level and add if necessary |
| Low idle speed setting is not correct - Adjustment required |
| Dirty or defective fuel pump - Service or change fuel pump |
| Main bearings or crankshaft are worn out - Need to install new components |
| Valve clearance is not correct - Adjust valve clearance |
| Piston rings or cylinder bore are damaged - Change defective parts |
| Incorrectly adjusted or dirty carburetor - Carburetor needs to be adjusted correctly or cleaned |
| Dirty air filter element - Service or change air filter |
| Clogged or damaged fuel pump - Check fuel pump and change if required |
| Defective ignition - Inspect ignition system and change failed components |
| Worn cylinder head gasket - Replace the gasket as required |
| Valves are stuck or burned - Replace or service valves |
| Push rod is damaged or worn - Replace push rod |
| Cylinder block parts are worn out - Defective components need to be replaced |
| Engine using too much gasoline |
| Insufficient throttle opening - Adjust or replace throttle cable |
| Improper carburetor main jet adjustment - Adjust main jet as required |
| Defective or loose spark plug - Tighten or replace spark plug |
| Valves are worn, stuck, or burned - Replace or service valves |
| Worn sleeve, piston, or rings - Change defective components |
| Valve clearance is improper - Adjust to proper valve clearance |
| Engine oil consumption is too high |
| Damaged gaskets or seals - Replace worn parts to avoid leaks |
| Damaged valve stems or valve guides - Valves need to be changed |
| Stuck or defective piston rings - Change the piston rings as required |
| Cylinder liner or piston is scored - Check piston and liner, change as required |
| Plugged breather pipe or hose - Replace or service |
| Transmission Troubleshooting |
| Difficulty shifting gears |
| Gear shift linkage is stuck or damaged - Clean or change shift linkage |
| Bent or worn shift forks - Change the shift forks |
| Defective gearshift mechanism - Replace defective components |
| Transmission makes excessive noise |
| Low transmission fluid level - Add fluid to the transmission housing |
| Dirty transmission fluid - The fluid must be changed |
| Bearings are worn or gears are damaged - Install new gears or bearings |
| Transmission jumps out of gear |
| Damaged or incorrectly installed gear shift lever - Install the lever correctly or replace it |
| Worn or damaged gear teeth - Replace gears |
| Shift rods or shift forks are faulty - Replace defective forks or rods |
| Drive belt/shaft is improperly adjusted or worn - Replace belt/shaft or adjust it |
| Worn brake/clutch or improper brake/clutch adjustment - Adjust clutch/brake or install a new one |
| Drive pulley is worn or faulty - Replace pulley |
| Mower Deck Troubleshooting |
| Mower vibration is excessive |
| Drive pulley of mower deck is damaged or dirty - Change or clean pulley |
| Loose or worn drive belt - Replace belt or adjust belt tension |
| Mower blades are not balanced or warped - Change or balance blades |
| Loose blade mounting bolts - Tighten it fast |
| Discharge chute is regularly plugged |
| High ground speed - Operate at slower speed |
| Grass is too long - Use a lower cutting height |
| Engine runs at low revs - Adjust carburetor to higher rpm |
| Mower cuts too low - Adjust mower to higher cutting height |
| Incorrect mower drive belt installation - Check drive belt for correct installation |
| Mower leaving random uncut of grass |
| Clogged mower deck - Clean out the mower deck |
| Blades are excessively dull - Blades need to be sharpened |
| Damaged or worn blades - Blades must be changed |
| Mowing speed is too high - Use a lower speed |
| Mower cuts too low - Change cutting height adjustment |
| Grass bag is overfilled - Grass bag must be empty |
| Lawn is bumpy or not smooth - Level the lawn |
| Cutting level is too low - Change cutting height adjustment |
| Fast ground speed - Select a lower speed |
| Incorrect level of mower deck - Adjust the level of mower deck correctly |
| Damaged or bent blades - Install new blades |
| Tire pressure is too low - Inflate tires as required |
| Tires are not properly inflated - Correct tire pressure |
| Deck is not leveled correctly - Level the deck correctly |
| Blades are excessively dull - Need a blade sharpening |
| Blades are worn or damaged - Blades need to be replaced |
| Clogged mower deck - Mower deck needs to be cleaned |
| Broken mower deck shell - Repair or replace the deck |
| Loose or defective mower spindle - Repair or replace the spindle |
| Electrical Troubleshooting |
| Battery cannot be charged |
| Loose or corroded cable connections - Tighten or service connections |
| Faulty battery terminal clamps - Replace terminal clamps |
| Worn-out battery - Use a new battery |
| Battery power is low - Charge the battery |
| Battery will not hold charge - Service or change the battery |
| Bad terminals or disconnected battery cables - Connect wires properly or change terminals |
| Starter motor is not working |
| Battery is low or faulty - Charge or replace the battery |
| Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required |
| Battery power is low - Recharge the battery |
| Spark plug dirty or improperly gapped - Clean and gap or replace |
| Faulty solenoid or starter motor - Repair starter or change solenoid |
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| Lawn and Garden Tractors Technical Specs |
