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Husqvarna LTH17538 Troubleshooting
The
Husqvarna LTH17538 lawn tractor was manufactured between 2020 and 2022. The
Husqvarna LTH17538 driveline consists of Briggs and Stratton 31R977 Intek single
cylinder OHV vertical shaft air-cooled gasoline engine and Tuff Torq K46 BA
belt-driven hydrostatic transmission with infinite forward and reverse gears.
A 30.5 cubic inches (500 cc) engine has a cylinder bore of 3.56" (91
mm), piston stroke of 3.06" (78 mm), and rated power of 17.5 hp (13 kW).
The fuel system has a float fixed main jet carburetor and integral type
fuel pump. The maximum forward speed - 5.5 mph (8.8 kph), maximum
reverse speed - 2.5 mph (4 kph).
The Husqvarna LTH17538 riding mower is equipped with a manual steering,
pneumatic wheels, 15x6.00-6 front tires, and 20x8.00-8 rear tires.
Compatible attachments for the lawn tractor: 44", 48" or 60" mid-mount
mower decks with a cutting height of 1.0-4.0 inches (25-102 mm), a 46"
front blade and 42" front-mount single-stage snow blower with a
mechanical lift system.
| Engine Troubleshooting |
| Engine won't start or difficult to start |
| No gasoline in tank - Fill gasoline up |
| Incorrect fuel grade - Change gasoline |
| Air in the fuel lines - Bleed the fuel lines |
| Spark plug wiring connection is defective - Inspect spark plug wiring connection, change or repair |
| Spark plug is faulty - Change spark plug as required |
| Dirty fuel filter - Install new filter |
| Faulty safety switch - Change damaged switch |
| Carburetor problems - Carburetor diagnostics required |
| Low engine compression - Inspect cylinder block and change defective components |
| Throttle cable is adjusted improperly or worn - Adjust properly or replace the cable |
| Air intake screen is blocked - Wash or clean as required |
| Defective ignition - Inspect ignition system and change faulty parts |
| Choke cable is stuck or faulty - Service or replace the cable |
| Air filter element is clogged - Clean or replace air filter |
| Fuel pump is damaged or dirty - Service or replace fuel pump |
| Engine starts and then stalls |
| Damaged spark plug - Replace spark plug |
| Clogged or defective carburetor - Service or repair carburetor |
| Ignition coil is not working - Change ignition coil as required |
| Valve springs are damaged or weak - New valve springs need to be installed |
| Stuck valves - Clean the valves |
| Engine oil level is low - Check oil level and add oil as required |
| Engine overloaded - Reduce the load |
| Air intake screen is plugged - Need to wash or clean |
| Carburetor is running lean - Make the correct settings |
| Ignition timing is improper - Set the ignition timing properly |
| Incorrect valve setting - Valves needs to be set correctly |
| Stale gasoline - Use correct gasoline |
| Engine is under excessive load - Reduce the load |
| Engine oil level low - Need to add engine oil |
| Too low idle RPM - Correct idle adjustment |
| Fuel pump is damaged or dirty - Test fuel pump and replace if necessary |
| Main bearings or crankshaft wear - Install new parts as as required |
| Excessive valve clearance - Adjust valve clearance according to specifications |
| Piston rings or cylinder bore are damaged - Replace defective parts |
| Dirty or incorrectly adjusted carburetor - Adjust carburetor properly or service it |
| Air filter element is clogged - Service or replace air filter |
| Fuel pump is clogged or faulty - Check fuel pump and replace if necessary |
| Ignition system failure - Check ignition and replace faulty components |
| Blown cylinder head gasket - Replace the head gasket |
| Valves are stuck or burned - Service or change valves |
| Push rod is damaged or worn - Change push rod |
| Damaged cylinder block components - Replace defective parts |
| Engine uses too much fuel |
| Throttle opening is not full - Adjust or change throttle cable |
| Carburetor main jet adjustment is incorrect - Adjust the carburetor main jet properly |
| Loose or defective spark plug - Re-tighten or change the spark plug |
| Valves are worn, stuck, or burned - Change or service valves |
| Piston, sleeve, or rings are damaged - Change defective parts |
| Valve clearance is improper - Adjust valve clearance |
| Engine consuming too much oil |
| Seals or gaskets are wearing excessively - Install new components |
| Worn valve stems and valve guides - Install new valves |
| Piston rings are seized or worn - Change piston rings |
| Scuffed piston or cylinder liner - Inspect piston and liner, fit new components as necessary |
| Breather hose or pipe is plugged - Clean or replace |
| Hydrostatic Transmission Troubleshooting |
| Hydrostatic transmission makes noise |
| Speed control linkage is defective or unadjusted - Adjust or install new linkage |
| Excessive loading - Reduce loading |
| Insufficient oil level or contaminated oil - Add oil to the correct level or fill the transmission with fresh oil |
| Worn or defective parts of the hydrostatic transmission - Change or repair defective parts |
| Stuck or worn shift linkage - Linkage need to be replaced |
| Seized or worn hydrostatic pump - Repair or replace pump |
| Transmission shift control parts are damaged or misadjusted - Change or adjust correctly |
| Transmission fluid level is low - Need to add transmission fluid |
| Damaged or worn drive pulley - Change pulley |
| Unadjusted or broken shift linkage - Change or adjust linkage |
| Bent or unadjusted speed control pedal linkage - Adjust or change linkage |
| Transmission gaskets or seals are worn - Change gaskets or seals |
| Final drive shaft leaks - Change shaft seals |
| Cracked transmission housing - Install a new transmission housing |
| Mower Deck Troubleshooting |
| Mower vibrates too much |
| Clogged or damaged mower drive sheave - Replace or service sheave |
| Drive belt is damaged or loose - Replace belt or adjust belt tension |
| Mower blades are not balanced or warped - Change or balance blades |
| Blade bolts are not tightened well - Bolts need to be tightened |
| Discharge chute regular clogging |
| Fast ground speed - Operate at slower speed |
| Tall grass - Adjust mower to lower cutting height |
| Low engine speeds - Throttle is not fully open |
| Mower cuts too low - Need to set high cutting height |
| Drive belt installation is not correct - Drive belt must be installed correctly |
| Grass patches are not cut |
| Mower deck is clogged - Check cutting deck and clean as necessary |
| Blades are too dull - Blades need to be sharpened |
| Blades are worn or damaged - Blades need to be replaced |
| Fast ground speed - Use a lower speed |
| Low cutting height - Must be set to high cutting height |
| Filled bagger - Clean bagger |
| Bumpy or unleveled lawn - Lawn leveling required |
| Low cutting height - Need to set high cutting height |
| High mowing speed - Select a slower speed |
| Improperly leveled mower deck - Adjust the level of mower deck correctly |
| Worn or bent blades - Replace the blades |
| Tires are not properly inflated - Inflate tires as required |
| Mower deck to cut unevenly |
| Tire pressure is too low - Inflate tires correctly |
| Incorrectly leveled mower deck - Level the deck correctly |
| Blades are too dull - Need to sharpen the blades |
| Blades are defective or worn - Replace the blades |
| Discharge chute is plugged - Clean mower deck as required |
| Deck shell is damaged - Replace or rebuild mower deck |
| Mower spindle is loose or defective - Replace or repair the spindle |
| Electrical Troubleshooting |
| Battery will not charge |
| Corroded or loose electrical wire connections - Service or tighten cable connections |
| Battery terminal connectors are faulty - Terminal connectors need to be changed |
| Battery is worn - Use a new battery |
| Low battery output - Charge the battery |
| Battery will not hold charge - Service or change the battery |
| Terminals are faulty or battery cables are disconnected - Check cable connections and replace or service terminals |
| Battery is drained or worn - Need to charge or replace the battery |
| Disconnected or improperly connected wiring harness - Inspect battery wiring harness and connect as required |
| Low battery voltage - Battery needs to be recharged |
| Spark plug faulty or incorrectly gapped - Replace or clean and gap |
| Starter motor or solenoid is defective - Starter/solenoid needs to be replaced |
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| Lawn and Garden Tractors Technical Specs |
