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Husqvarna LTH 151 Troubleshooting
The
Husqvarna LTH 151 is a 2-wheel drive lawn tractor. This model was manufactured
between 2004 and 2011. The tractor is equipped with a 29.1 cu.in (477 cc) Kohler
Courage SV470 4-cycle single-cylinder vertical shaft air-cooled gasoline engine.
The engine has a cylinder bore of 3.3" (84 mm), piston stroke of 3.38"
(86 mm), and rated power of 15 hp (11.2 kW). The Husqvarna LTH151
tractor is fitted with a 3 types of transmission. Type 1: Hydro-Gear
322-0510 hydrostatic transaxle. Type 2: Tuff Torq K46 BA belt-driven
hydrostatic transmission. Type 3: Hydro-Gear T2 belt-driven hydrostatic
transmission.
The maximum forward speed - 5.5 mph (8.8 kph), maximum reverse speed -
2.9 mph (4.6 kph). The Husqvarna LTH 151 tractor is equipped with a
manual steering, disc brakes, 15x6.00-6 front tires, and 18x9.50-8 rear
tires. The tractor is compatible with a 38" mid-mount 2-blade side
discharge mower deck with cutting height of 1.5-4.0 in (38-102 mm),
manual blade engagement, six cut positions, and mechanical lifting
system.
| Engine Troubleshooting |
| Engine starts up hard or won't start |
| No fuel in fuel tank - Fill gasoline up |
| Incorrect fuel grade - Change gasoline |
| Water or air in fuel system - Remove air or water from system |
| Damaged spark plug wiring connection - Inspect spark plug wiring connection, change or repair |
| Damaged spark plug - Change spark plug |
| Fuel filter is plugged - Replace fuel filter |
| Brake pedal not depressed - Press the brake pedal |
| Carburetor is not working properly - Inspect and adjust |
| Low engine compression - Inspect cylinder block and change defective components |
| Throttle cable is damaged or adjusted incorrectly - Replace cable or adjust correctly |
| Plugged cooling fins - Need to wash or clean |
| Ignition system is defective - Inspect ignition system and change failed components |
| Faulty or stuck throttle cable - Change or service the cable |
| Dirty air filter element - Change or service air filter |
| Dirty or faulty fuel pump - Test fuel pump and change if necessary |
| Engine starts and immediately shuts off |
| Spark plug is defective - Change spark plug |
| Dirty or faulty carburetor - Clean or change carburetor |
| Ignition coil is not working - Ignition coil must be replaced |
| Broken or bad valve springs - Change valve springs |
| Stuck valves - Clean the valves |
| Not enough engine oil - Need to add engine oil |
| Engine is overloaded - Reduce the load |
| Plugged cooling fins - Clean and wash as required |
| Too lean fuel mixture in carburetor - Use proper settings |
| Wrong ignition timing - Ignition timing needs to be adjusted correctly |
| Incorrect valve setting - Set the valves properly |
| Low octane fuel - Use correct gasoline |
| Engine overloaded - Load reducing is recommended |
| Engine oil level is insufficient - Add oil to the engine crankcase |
| Improperly adjusted low idle speed - Adjust idling as required |
| Fuel pump is damaged or dirty - Service or change fuel pump |
| Main bearings or crankshaft failure - Worn parts replacement required |
| Valve clearance is improper - Adjust to proper valve clearance |
| Worn piston rings or cylinder bore - Replace faulty parts |
| Engine power is insufficient |
| Incorrectly adjusted or dirty carburetor - Service or properly adjust carburetor |
| Plugged air filter - Clean or replace air filter |
| Dirty or defective fuel pump - Service or replace fuel pump |
| Defective ignition system - Inspect ignition system and change failed components |
| Cylinder head gasket is worn - Install new cylinder head gasket |
| Valves are burned or stuck - Change or clean valves |
| Worn or defective push rod - Push rod should be replaced |
| Cylinder block components are damaged - Replace defective parts |
| Engine using too much gasoline |
| Throttle not fully open - Check throttle cable and adjust as required |
| Improper adjustment of carburetor main jet - Adjust it correctly |
| Spark plug is loose or defective - Tighten or replace spark plug |
| Stuck, burned, or worn valves - Change or clean valves |
| Worn rings, piston, or sleeve - Replace defective components as required |
| Improper valve clearance - Adjust valve clearance |
| Engine oil consumption is too high |
| Defective seals or gaskets - Replace defective parts |
| Worn valve stems and valve guides - Valves need to be changed |
| Piston rings are stuck or worn - Change piston rings |
| Cylinder liner or piston is scored - Inspect liner and piston, replace as necessary |
| Breather pipe or hose is plugged - Change or service |
| Hydrostatic Transmission Troubleshooting |
| Hydrostatic transmission noise |
| Bent or unadjusted speed control pedal linkage - Adjust or replace linkage |
| Transmission overloaded - Reduce loading |
| Contaminated transmission fluid or low fluid level - Top up to proper level or change transmission fluid |
| Worn or defective transmission components - Check HST components for defect or damage and change if necessary |
| Corroded or worn shift linkage - Lubricate or change linkage |
| Hydrostatic pump is stuck or worn - Replace or repair pump |
| Defective or unadjusted transmission shift control components - Adjust correctly or replace |
| Insufficient transmission oil - Fill up the transmission oil |
| Drive sheave is worn or faulty - Change sheave |
| Shifter linkage is faulty or not adjusted - Change or adjust linkage |
| Speed control pedal linkage is bent or not adjusted - Adjust or replace linkage |
| Transmission gaskets or seals are worn - Replace gaskets or seals |
| Leaking final drive shaft - Shaft seals need to be changed |
| Cracked transmission housing - Replace damage housing or transmission assembly |
| Mower Deck Troubleshooting |
| Excessive mower vibration |
| Drive sheave of mower deck is dirty or worn - Service or change sheave |
| Loose or defective drive belt - Replace belt or adjust belt tension |
| Cutting blades are bent or unbalanced - Balance blades or replace it |
| Loose blade bolts tightening - Tighten bolts as required |
| Discharge chute keeps clogging |
| High mowing speed - Use a slower speed |
| Grass is too high - Must be set to low cutting height |
| Engine rpm is too low - Adjust choke to full opening |
| Mower deck set to low cutting - Change cutting height adjustment |
| Incorrect mower drive belt installation - Install drive belt correctly |
| Deck is plugged with grass - Clean mower deck as required |
| Not sharp blades - Need a blade sharpening |
| Damaged or worn blades - Blades need to be replaced |
| Ground speed is too fast - Use a slower speed |
| Mower deck set to low cutting - Must be set to high cutting height |
| Grass bag is full - Clean grass bag |
| Lawn is bumpy or not smooth - Level the lawn |
| Low cutting height - Need to set high cutting height |
| Ground speed is too fast - Select a lower speed |
| Deck level is not correct - Level the deck correctly |
| Blades are bent or worn - Change the blades |
| Low tire inflation - Inflate tires correctly |
| Tire pressure is too low - Check and inflate the tires |
| Deck level is not correct - Level the deck properly |
| Not sharp blades - Sharpen the blades |
| Bent or worn blades - Blades need to be replaced |
| Mower deck is clogged - Check cutting deck and clean as necessary |
| Deck shell is damaged - Replace or rebuild mower deck |
| Loose or defective mower spindle - Spindle needs to be repaired or replaced |
| Electrical Troubleshooting |
| Battery does not charge |
| Loose or corroded wire connections - Clean or tighten wiring connections |
| Electrical terminal connectors are faulty - Replace terminal connectors |
| Bad cell in battery - Battery replacement required |
| Low battery power - Recharge the battery |
| Battery is draining quickly - Service battery or change it |
| Terminals are faulty or battery cables are disconnected - Check cables and clean or change terminals |
| Battery is drained or defective - Charge or change the battery |
| Wiring is improperly connected or disconnected - Check wiring and connect properly |
| Low battery capacity - Battery is drained, charge it |
| Spark plug faulty or incorrectly gapped - Clean, gap or replace spark plug |
| Starter motor or solenoid is defective - Starter/solenoid should be replaced |
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| Lawn and Garden Tractors Technical Specs |
