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Husqvarna YT42LS Troubleshooting
The
Husqvarna YT42LS is a 2WD lawn tractor. This model was manufactured from 2013 to
2018. The Husqvarna YT42LS drivetrain system components: a 44.2 cu.in (725 cc)
Kohler KT725 7000 Series 4-cycle OHV twin-cylinder air-cooled gasoline engine
with a rated power of 22 hp (16.4 kW), or 36.8 cu.in (603 cc) Kawasaki FR600V
4-cycle vertical-shaft V-twin air-cooled gasoline engine with a maximum power of
18.5 hp (13.8 kW), and Tuff Torq K46 CR hydrostatic transmission with infinite
forward and reverse gears.
The maximum travel speed (forward/reverse): 5.5 mph (8.8 km/h) and 2.4
mph (4 km/h). The Husqvarna YT42LS tractor is equipped with a manual
steering system, pneumatic wheels, 15x6.00-6 front tires, and 20x8.00-8
rear tires. The lawn tractor is compatible with a 42" mid-mount 2-blade
side discharge mower deck with cutting height of 1.5-4.0 in (38-101 mm),
electric blade engagement, six cut positions, two anti-scalp wheels, and
mechanical lifting system.
| Engine Troubleshooting |
| Engine won't start or difficult to start |
| Fuel tank is empty - Add gasoline |
| Improper fuel grade - Use quality gasoline |
| Fuel system clogged - Repair or replace |
| Damaged spark plug wiring connection - Inspect the spark plug wire connection, replace or repair |
| Spark plug is faulty - Change spark plug as required |
| Dirty fuel filter - Install new filter |
| Brake pedal not pushed down - Push the brake pedal down |
| Carburetor settings incorrect - Adjusting as required |
| Bad compression - Check and change damaged parts |
| Throttle cable is adjusted incorrectly or damaged - Change cable or adjust properly |
| Air intake grill is clogged - Need to wash or clean |
| Ignition system is defective - Check ignition and replace faulty components |
| Defective or stuck throttle cable - Replace or clean the cable |
| Air filter element is plugged - Change or clean air filter |
| Fuel pump is dirty or defective - Service or change fuel pump |
| Engine starts but stalls suddenly |
| Spark plug is defective - Replace spark plug |
| Defective or clogged carburetor - Clean or install new carburetor |
| Defective ignition coil - Install a new ignition coil |
| Bad or damaged valve springs - Change valve springs |
| Valves are stuck - Valves must be cleaned |
| Engine oil insufficient - Check oil level and add oil as required |
| Engine is running overloaded - Reduce engine load |
| Plugged cooling fins - Clean and wash as required |
| Carburetor is running lean - Set the carburetor properly |
| Ignition timing is incorrect - Adjust ignition timing as required |
| Valve setting is improper - Set the valves properly |
| Engine knocking sound or abnormal noise |
| Low octane gasoline - Use correct fuel |
| Engine overloaded - Reduce load |
| Engine oil level is insufficient - Check oil level and add oil as required |
| Too low idle RPM - Test and adjust |
| Dirty or faulty fuel pump - Clean or replace fuel pump |
| Crankshaft or main bearings failure - Worn parts replacement required |
| Incorrect valve clearance - Adjustment procedure required |
| Damaged cylinder bore or piston rings - Replace defective parts |
| Incorrectly adjusted or clogged carburetor - Adjust the carburetor properly or clean it |
| Air filter element is clogged - Change or clean air filter |
| Fuel pump is clogged or faulty - Service or change fuel pump |
| Ignition system is defective - Test ignition and replace failed parts |
| Worn cylinder head gasket - Replace cylinder head gasket |
| Burned or stuck valves - Replace or service valves |
| Bent or worn push rod - Install a new push rod |
| Worn cylinder block parts - Defective components need to be replaced |
| Engine uses too much fuel |
| Insufficient choke opening - Inspect choke cable and adjust as required |
| Improper carburetor main jet adjustment - Adjust it correctly |
| Loose or defective spark plug - Tighten or replace spark plug |
| Valves are worn, burned or stuck - Change or clean valves |
| Worn piston, rings, or sleeve - Replace defective components as required |
| Valve clearance is improper - Adjust valve clearance according to specifications |
| Engine consuming too much oil |
| Seals or gaskets are defective - To repair leaks, replace worn parts |
| Worn valve stems and valve guides - Valves need to be changed |
| Piston rings are seized or worn - Change the piston rings as required |
| Piston or cylinder liner is worn - Inspect liner and piston, fit new parts as necessary |
| Breather pipe or hose is plugged - Clean or change |
| Hydrostatic Transmission Troubleshooting |
| Hydrostatic transmission is making noise |
| Speed control linkage is worn or unadjusted - Adjust or install new linkage |
| Transmission overload - Reduce the load is required |
| Low transmission oil level or contaminated oil - Add oil to proper level or pour fresh transmission oil |
| Worn or defective transmission components - Check internal transmission parts for damage or wear and replace if required |
| Shift linkage is stuck or damaged - Clean or change linkage |
| Hydrostatic pump is defective or blocked - Repair or replace pump |
| Damaged or unadjusted transmission shift control components - Replace or adjust as required |
| Transmission oil level is low - Check transmission oil level and add oil as required |
| Damaged or worn drive pulley - Replace pulley |
| Shift linkage is damaged or unadjusted - Adjust properly or replace linkage |
| Speed control linkage is worn or unadjusted - Adjust or repair linkage |
| Transmission seals or gaskets are broken - Seals and gaskets need to be replaced |
| Final drive shaft leaks - Install new shaft seals |
| Transmission housing is cracked - Replace damage housing or transmission assembly |
| Mower Deck Troubleshooting |
| Mower vibration is excessive |
| Worn or dirty mower drive pulley - Replace or service pulley |
| Loose or worn drive belt - Change belt or adjust belt tension |
| Not balanced or bent mower blades - Change or balance blades |
| Loose blade mounting bolts - Tighten bolts as required |
| Constant clogging of discharge chute |
| Fast mowing speed - Select a lower speed |
| Grass is too long - Must be set to low cutting height |
| Low engine speeds - Adjust throttle to full opening |
| Cutting height is too low - Use correct cutting height |
| Drive belt installation is not correct - Install drive belt as required |
| Deck clogged with grass clippings - Mower deck needs to be cleaned |
| Excessive blade dullness - Blades need to be sharpened |
| Worn or damaged blades - Blades must be changed |
| High mowing speed - Use a slower speed |
| Cutting level is too low - Need to set high cutting height |
| Grass bag is full - Empty the grass bag |
| Uneven or bumpy lawn - Level the lawn |
| Low cutting height - Change cutting height adjustment |
| Fast mowing speed - Need to slow down |
| Deck is not leveled correctly - Level the deck correctly |
| Worn or bent blades - Install new blades |
| Low tire pressure - Need to inflate tires |
| Low tire pressure - Inflate tires correctly |
| Improper mower deck level - Deck needs to be adjusted properly |
| Excessive blade dullness - Sharpen the blades |
| Worn or bent blades - Change the blades |
| Deck clogged with grass clippings - Check cutting deck and clean as necessary |
| Damaged mower deck housing - Replace or repair the deck |
| Mower spindle is bent or loose - Install new spindle or repair it |
| Electrical Troubleshooting |
| Battery will not charge |
| Corroded or loose wire connections - Tighten or service connections |
| Battery terminal clamps are faulty - Change terminal clamps |
| Worn-out battery - Install a new battery |
| Battery voltage is low - Charge the battery |
| Battery runs out quickly - Service or replace the battery |
| Battery terminals are corroded or wires are disconnected - Check cables and clean or change terminals |
| Battery is discharged or defective - Change or recharge battery |
| Wiring is improperly connected or disconnected - Check wiring and connect properly |
| Low battery output voltage - Recharge the battery |
| Faulty or incorrectly gapped spark plug - Clean and gap or replace |
| Starter motor or solenoid failing - Repair starter or replace solenoid |
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| Lawn and Garden Tractors Technical Specs |
