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Husqvarna TS 138L Troubleshooting

The Husqvarna TS 138L 2-wheel drive lawn tractor was manufactured between 2019 and 2022. The Husqvarna TS138L driveline consists of Loncin LC1P92F-1 four-cycle vertical-shaft single cylinder air-cooled gasoline engine and Tuff Torq K46 BA belt-driven hydrostatic transmission with infinite forward and reverse gears.

A 27.6 cubic inches (452 cc) engine has a cylinder bore of 3.62" (92 mm), piston stroke of 2.68" (68 mm), and max power of 16 hp (11.9 kW). The fuel system has a fixed main jet carburetor and pulse fuel pump. The maximum forward speed - 5 mph (8 kph), maximum reverse speed - 2.2 mph (3.5 kph).

The Husqvarna TS 138L lawn tractor is equipped with a manual steering, pneumatic wheels, 15x6.00-6 front tires, and 18x8.50-8 rear tires. Compatible attachments for the tractor: 38" mid-mount 2-blade side discharge mower deck with cutting height of 1.5-4.0 in (38-101 mm), manual blade engagement, six cut positions, and mechanical lifting system with hand operated.

Engine Troubleshooting
Engine difficult to start or doesn't start
Gas tank is empty - Add gasoline
Low-quality gasoline - Change fuel
Fuel system clogged - Repair or replace
Defective wiring connection of spark plug - Inspect the spark plug wire connection, replace or repair
Damaged spark plug - Install new spark plug
Fuel filter is dirty - Replace fuel filter
Defective safety switch - Replace if required
Carburetor malfunction - Check and repair as required
Low cylinder compression - Check cylinder block and replace worn parts
Damaged or incorrectly adjusted choke cable - Replace cable or adjust properly
Engine runs intermittently
Clogged cooling fins - Wash or clean as required
Defective ignition system - Check ignition and replace faulty components
Stuck or faulty throttle cable - Change or clean the cable
Clogged air filter - Replace or clean air filter
Fuel pump is dirty or defective - Clean or change fuel pump
Engine starts but immediately stops
Spark plug is defective - Change spark plug as required
Carburetor is defective or dirty - Clean or change carburetor
Defective ignition coil - Replace ignition coil as necessary
Valve springs are worn or loose - Install new valve springs
Stuck valves - Service the valves
Engine overheating
Low engine oil level - Fill up the engine oil
Engine overload - Load reducing is recommended
Cooling fins are blocked - Clean and wash as required
Carburetor is running lean - Make the correct settings
Wrong ignition timing - Set the ignition timing correctly
Incorrect valve setting - Set the valves properly
Abnormal engine knocking or noise
Stale gasoline - Use correct fuel
Engine is overloaded - Load reducing required
Engine oil level low - Fill up the oil to required level
Low idle speed setting is not correct - Adjust idle speed
Fuel pump is faulty or clogged - Test fuel pump and change if necessary
Main bearings or crankshaft failure - Worn parts replacement required
Valve clearance is wrong - Adjust valve clearance according to specifications
Damaged cylinder bore or piston rings - Change defective components
Engine power is too low
Carburetor is dirty or incorrectly adjusted - Adjust carburetor properly or service it
Dirty air filter element - Service or replace air filter
Fuel pump is damaged or dirty - Clean or change fuel pump
Ignition system failure - Check ignition and replace faulty components
Cylinder head gasket is worn - Replace cylinder head gasket
Valves are stuck or burned - Replace or clean valves
Push rod is worn or damaged - Push rod should be replaced
Cylinder block parts are damaged - Replace defective parts
Excessive fuel consumption
Throttle does not open well - Inspect throttle cable and adjust it
Carburetor main jet adjustment is incorrect - Adjust the carburetor main jet properly
Spark plug is loose or defective - Tighten or replace spark plug
Valves are stuck, burned, or worn - Clean or replace valves
Sleeve, rings, or piston are damaged - Replace faulty components
Incorrect valve clearance - Need to adjust valve clearance
Engine oil consumption is too high
Gaskets or seals are excessively worn - Replace worn parts to avoid leaks
Damaged valve stems or valve guides - Replace the valves
Worn or stuck piston rings - Install new piston rings
Damaged piston or cylinder liner - Inspect liner and piston, change as necessary
Breather pipe or hose is blocked - Replace or clean

Hydrostatic Transmission Troubleshooting
HST transmission makes excessive noise
Worn or out of adjustment speed control linkage - Replace or adjust linkage
Excessive transmission load - The load should be reduced
Transmission fluid is dirty or fluid level is too low - Add fluid to the correct level or fill the HST with fresh fluid
Defective or worn transmission parts - Change or repair defective parts
Hard shifting
Rusty or worn shift linkage - Install a new gear linkage
Seized or worn hydrostatic pump - Repair or change pump
Worn or misadjusted transmission shift control parts - Change or adjust correctly
Power is too low
Low fluid level - Fill the transmission housing to proper fluid level
Damaged or worn drive pulley - Install a new pulley
Damaged or misadjusted shifter linkage - Adjust properly or replace linkage
Speed control linkage is worn or unadjusted - Change or adjust linkage
Transmission leakage
Worn transmission seals or gaskets - Install new seals or gaskets
Final drive shaft leakage - Install new shaft seals
Cracked transmission housing - Install a new transmission housing

Mower Deck Troubleshooting
Mower vibrates too much
Damaged or clogged mower drive pulley - Replace or service pulley
Loose or defective drive belt - Belt needs to be adjusted or replaced
Cutting blades are not balanced or warped - Balance blades or replace it
Blade mounting bolts are loose - Tighten it fast
Constant clogging of discharge chute
Mowing speed is too high - Use a lower speed
Grass is too long - Need to set low cutting height
Low engine speeds - Throttle is not fully open
Mower cuts too low - Use a higher cutting height
Mower drive belt installation is improper - Check drive belt for correct installation
Streaking of uncut grass
Cutting deck is clogged - Need to clean the mower deck
Blades are not sharp - Need to sharpen the blades
Blades are worn or damaged - Replace the blades
Mowing speed is too high - Operate at slower speed
Cutting level is too low - Change cutting height adjustment
Grass bag is overfilled - Grass bag must be empty
Blades are scalping the grass
Lawn is uneven or bumpy - Level the lawn
Mower deck set to low cutting - Raise the cutting height
Fast mowing speed - Need to slow down
Incorrectly leveled mower deck - Deck needs to be adjusted properly
Worn or bent blades - Install new blades
Incorrect tire pressure - Need to inflate tires
Mower cutting is uneven
Tires are not properly inflated - Correct tire pressure
Incorrectly leveled mower deck - Level the deck properly
Not sharp blades - Need to sharpen the blades
Blades are worn or damaged - Replace the blades
Deck clogged with grass clippings - Inspect and clean cutting deck
Broken mower deck shell - Replace or repair the deck
Bent or loose mower spindle - Replace or repair the spindle

Electrical Troubleshooting
Battery cannot be charged
Electrical cable connections are loose or corroded - Tighten or clean electrical wiring connections
Battery terminal connectors are defective - Change terminal connectors
Battery is worn - Install a new battery
Starter turns slow
Battery power is low - Battery is drained, recharge it
Battery runs out quickly - Service battery or replace it
Faulty battery terminals or disconnected cables - Connect wiring properly or install new terminals
Starter will not work
Battery is drained or defective - Need to charge or replace the battery
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed
Low battery voltage - Recharge the battery
Spark plug dirty or improperly gapped - Clean, gap or change spark plug
Damaged starter motor or solenoid - Repair starter or install a new solenoid



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