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Husqvarna YT42DXL Troubleshooting
The
Husqvarna YT42DXL is a two-wheel drive lawn tractor. This model was manufactured
from 2017 to 2022. The Husqvarna YT42DXL drivetrain system components: Kohler
KT725 7000 Series 4-cycle twin-cylinder air-cooled vertical shaft gasoline
engine and Tuff Torq K46 BT belt-driven hydrostatic transaxle with
foot-controlled variable speed drive.
A 44.2 cu.in (725 cc) engine has a cylinder bore of 3.27" (83 mm),
piston stroke of 2.64" (67 mm), and max power of 22 hp (16.3 kW). The
maximum travel speed (forward/reverse): 5.5 mph (8.8 km/h) and 2.4 mph
(3.8 km/h).
The Husqvarna YT42DXL 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, 7 cut positions, two anti-scalp wheels, and mechanical
lifting system.
| Engine Troubleshooting |
| Engine starts hard or won't start |
| No gasoline in tank - Fill it up |
| Incorrect fuel grade - Change fuel |
| Air in fuel system - Bleed fuel system |
| Defective wiring connection of spark plug - Check the spark plug wire connection, repair or replace |
| Spark plug is defective - Install new spark plug |
| Clogged fuel filter - Fuel filter needs changing |
| Brake pedal not pushed down - Push the brake pedal down |
| Incorrect carburetor adjustment - Adjust carburetor idle mixture screw |
| Low engine compression - Inspect cylinder block and change defective components |
| Incorrectly adjusted or damaged throttle cable - Change cable or adjust correctly |
| Cooling fins are plugged - Wash or clean as required |
| Ignition failure - Inspect ignition system and change failed components |
| Throttle cable is stuck or defective - Clean or change the cable |
| Dirty air filter element - Service or change air filter |
| Clogged or defective fuel pump - Check fuel pump and change if required |
| Engine starts but stops suddenly |
| Defective spark plug - Install new spark plug |
| Carburetor is clogged or defective - Repair or clean carburetor |
| Ignition coil is not working - Ignition coil should be replaced |
| Damaged or weak valve springs - Install new valve springs |
| Valves sticking - Clean the valves |
| Low engine oil level - Fill up the oil to required level |
| Engine is overloaded - Load reducing required |
| Cooling fins are plugged - Clean and wash as required |
| Carburetor is running lean - Adjust carburetor correctly |
| Ignition timing is wrong - Set the ignition timing properly |
| Valve setting is incorrect - Valves needs to be set correctly |
| Engine knocking sound or abnormal noise |
| Stale gasoline - Change fuel |
| Excessive engine load - Load reducing is recommended |
| Engine oil insufficient - Checking oil level and add if necessary |
| Wrong adjustment of low idle speed - Correct idle adjustment |
| Clogged or defective fuel pump - Test fuel pump and change if necessary |
| Worn main bearings or crankshaft - Change defective components as required |
| Valve clearance is incorrect - Adjust valve clearance according to specifications |
| Damaged cylinder bore or piston rings - Change faulty parts |
| Carburetor is improperly adjusted or clogged - Adjust the carburetor properly or clean it |
| Air filter is dirty - Change or clean air filter |
| Clogged or damaged fuel pump - Clean or replace fuel pump |
| Defective ignition system - Inspect ignition system and change failed components |
| Blown cylinder head gasket - Replace cylinder head gasket |
| Valves are stuck or burned - Change or service valves |
| Worn or damaged push rod - Change push rod |
| Damaged cylinder block parts - Replace defective components |
| Engine using too much gasoline |
| Insufficient choke opening - Inspect choke cable and adjust as required |
| Carburetor main jet adjustment is improper - Adjust it properly |
| Spark plug is loose or defective - Change or re-tighten spark plug |
| Stuck, worn, or burned valves - Clean or change valves |
| Sleeve, rings, or piston are damaged - Change defective parts |
| Valve clearance is not correct - Adjust valve clearance according to specifications |
| Engine using too much oil |
| Gaskets or seals may be damaged - Install new components |
| Damaged valve guides or valve stems - Valves need to be changed |
| Piston rings are seized or worn - Change the piston rings as required |
| Piston or cylinder liner is damaged - Check piston and liner, replace as required |
| Breather pipe or hose is blocked - Service or change |
| Hydrostatic Transmission Troubleshooting |
| HST transmission noise |
| Worn or out of adjustment speed control linkage - Adjust or replace linkage |
| Transmission overload - Reduce transmission load |
| Contaminated transmission fluid or low fluid level - Pour fresh fluid or add transmission fluid to proper level |
| Worn or defective transmission components - Change or repair defective parts |
| Corroded or worn shift linkage - Lubricate or change linkage |
| Hydrostatic pump is blocked or defective - Repair or replace pump |
| Transmission shift control components are defective or misadjusted - Adjust properly or change |
| Lack of transmission oil supply - Add oil to the transmission housing |
| Worn or faulty drive pulley - Install a new pulley |
| Not adjusted or damaged shifter linkage - Adjust correctly or change linkage |
| Speed control linkage is worn or unadjusted - Replace or adjust linkage |
| Transmission gaskets or seals are damaged - Install new seals or gaskets |
| Final drive shaft is leaking - Change shaft seals |
| Transmission case is cracked - Replace defective case or transmission assembly |
| Mower Deck Troubleshooting |
| Excessive mower vibration |
| Mower deck drive sheave is clogged or worn - Replace or clean sheave |
| Loose or defective drive belt - Replace belt or adjust belt tension |
| Unbalanced or warped cutting blades - Change or balance blades |
| Loose blade mounting bolts - Bolts need to be tightened |
| Discharge chute regular clogging |
| Fast ground speed - Use a slower speed |
| Long grass - Use a lower cutting height |
| Engine rpm is too low - Open choke fully |
| Cutting level is too low - Change cutting height adjustment |
| Incorrect mower drive belt installation - Drive belt must be installed correctly |
| Discharge chute is plugged - Need to clean the mower deck |
| Blades are too dull - Sharpen the blades |
| Worn or damaged blades - Change the blades |
| Ground speed is too fast - Operate at slower speed |
| Low cutting height - Use correct cutting height |
| Full bagger - Empty the bagger |
| Bumpy or not smooth lawn - Level the lawn |
| Mower deck set to low cutting - Raise the cutting height |
| Mowing speed is too high - Select a lower speed |
| Improper mower deck level - Level the deck correctly |
| Damaged or bent blades - Install new blades |
| Tires are not properly inflated - Correct tire pressure |
| Mower deck to cut unevenly |
| Tire pressure is too low - Check and inflate the tires |
| Incorrectly leveled mower deck - Deck needs to be adjusted properly |
| Excessive blade dullness - Need a blade sharpening |
| Blades are defective or worn - Install new blades |
| Cutting deck is clogged - Need to clean the mower deck |
| Deck housing is broken - Repair or replace the deck |
| Mower spindle is bent or loose - Change or repair the spindle |
| Electrical Troubleshooting |
| Battery does not charge |
| Wiring connections are corroded or loose - Tighten or clean connections |
| Battery terminal clamps are defective - Install new terminal clamps |
| Battery failing - Battery replacement required |
| Battery capacity is low - Recharge the battery |
| Battery is draining quickly - Service battery or change it |
| Corroded battery terminals or disconnected wires - Check cable connections and change or clean terminals |
| Battery is discharged or defective - Recharge or replace battery |
| Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly |
| Battery power is low - Charge the battery |
| Spark plug faulty or incorrectly gapped - Replace or clean and gap |
| Starter motor or solenoid failing - Starter/solenoid needs to be replaced |
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| Lawn and Garden Tractors Technical Specs |
