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Husqvarna CTH171 Troubleshooting
The
Husqvarna CTH 171 lawn tractor was manufactured between 2004 and 2008. The
components of Husqvarna CTH171 powerline system: Kohler Courage SV530 4-cycle
single-cylinder vertical shaft air-cooled gasoline engine and Hydro-Gear
321-0510 belt-driven hydrostatic transmission with infinite forward and reverse
gears.
A 32.6 cubic inches (535 cc) engine has a cylinder bore of 3.50" (89
mm), piston stroke of 3.38" (86 mm), rated power of 17 hp (12.7 kW), and
max torque of 37.8 Nm (27.9 lb-ft) at 2600 rpm.
Max. travel speed (forward/reverse): 5.5 mph (8.8 km/h) and 2.4 mph (3.8
km/h). The Husqvarna CTH171 was equipped with a manual steering system,
disc brakes, 15x6.00-6 front tires, and 20x10.00-8 rear tires. The
wheelbase is 47 in (1200 mm). The lawn tractor is compatible with a 36"
mid-mount 2-blade mower deck with cutting height of 1.0-3.5" (25-90 mm),
6 cut positions, 2 anti-scalp wheels, and mechanical lift system.
| Engine Troubleshooting |
| Engine starts up hard or won't start |
| No fuel in fuel tank - Add gasoline |
| Wrong grade of gasoline - Use correct gasoline grade |
| Dirt and debris in fuel system - Remove debris and dirt |
| Disconnected or loose spark plug wire - Inspect spark plug wiring connection, change or repair |
| Spark plug is defective - Change spark plug |
| Plugged fuel filter - Install new filter |
| Faulty safety switch - Change damaged switch |
| Wrong carburetor adjustment - Adjusting carburetor correctly |
| Engine has low compression - Check cylinder block and replace defective parts |
| Choke cable is unadjusted or damaged - Adjust properly or replace the cable |
| Cooling fins are plugged - Clean and wash as required |
| Ignition system is defective - Check ignition and replace faulty components |
| Choke cable is defective or stuck - Change or service the cable |
| Clogged air filter - Service or change air filter |
| Dirty or defective fuel pump - Test fuel pump and change if necessary |
| Engine starts and stalls immediately |
| Defective spark plug - Replace spark plug |
| Clogged or defective carburetor - Repair or clean carburetor |
| Ignition coil is faulty - Ignition coil should be replaced |
| Worn or loose valve springs - Install new valve springs |
| Valves are stuck - Clean the valves |
| Not enough engine oil - Check oil level and add oil as required |
| Engine is running overloaded - Load reducing is recommended |
| Air intake screen is blocked - Need to wash or clean |
| Too lean carburetor mixture - Adjust carburetor properly |
| Ignition timing is improper - Ignition timing needs to be adjusted correctly |
| Incorrect valve setting - Adjust valves correctly |
| Low octane gasoline - Use proper fuel |
| Engine is running overloaded - Load reducing required |
| Engine oil level is low - Checking oil level and add if necessary |
| Low idle speed setting is incorrect - Adjustment required |
| Dirty or defective fuel pump - Clean or replace fuel pump |
| Main bearings or crankshaft are worn out - Repair or replace defective parts |
| Valve clearance is not correct - Adjust valve clearance |
| Damaged piston rings or cylinder bore - Change faulty components |
| Carburetor is incorrectly adjusted or dirty - Adjust the carburetor correctly or clean it |
| Clogged air filter - Replace or service air filter |
| Fuel pump is faulty or clogged - Clean or install new fuel pump |
| Ignition system problems - Check ignition and replace faulty components |
| Cylinder head gasket is defective - Change cylinder head gasket |
| Valves are stuck or burned - Service or change valves |
| Push rod is worn or defective - Replace push rod |
| Cylinder block parts are worn out - Replace defective parts |
| Excessive fuel consumption |
| Throttle does not open well - Inspect throttle cable and adjust it |
| Improper adjustment of carburetor main jet - Adjust the carburetor main jet correctly |
| Spark plug is loose or defective - Spark plug need to be tightened or replaced |
| Valves are stuck, burned, or worn - Service or change valves |
| Worn sleeve, piston, or rings - Change defective parts |
| Valve clearance is incorrect - Check and adjust |
| High engine oil consumption |
| Gaskets or seals can be faulty - Replace worn parts to avoid leaks |
| Worn valve stems and valve guides - Replace the valves |
| Piston rings are seized or worn - Have piston rings replaced |
| Piston or cylinder liner is scored - Check liner and piston, install new components as required |
| Blocked breather pipe or hose - Clean or replace |
| Hydrostatic Transmission Troubleshooting |
| Hydrostatic transmission makes excessive noise |
| Bent or unadjusted speed control pedal linkage - Adjust or change linkage |
| Transmission overload - Reduce the load is required |
| Fluid is contaminated or fluid level is insufficient - Pour fresh fluid or add transmission fluid to proper level |
| Transmission components are damaged or worn - Change or repair defective parts |
| Damaged or loose shift linkage - Change or repair linkage |
| Seized or worn hydrostatic pump - Repair or replace pump |
| Misadjusted or faulty transmission shift control components - Replace or adjust as required |
| Insufficient transmission fluid - Check and refill the transmission fluid |
| Drive sheave is damaged or worn - Replace sheave |
| Shift linkage is unadjusted or damaged - Adjust properly or replace linkage |
| Speed control linkage is worn or unadjusted - Adjust or repair linkage |
| Transmission gaskets or seals are damaged - Replace seals or gaskets |
| Final drive shaft leaks - Install new shaft seals |
| Cracked transmission housing - Housing needs to be replaced |
| Mower Deck Troubleshooting |
| Mower vibrates excessively |
| Worn or dirty mower drive pulley - Change or clean pulley |
| Loose or damaged drive belt - Replace belt or adjust belt tension |
| Not balanced or bent mower blades - Balance or change blades |
| Blade mounting bolts are loose - Bolts need to be tightened |
| Constant clogging of discharge chute |
| Ground speed is too fast - Use a slower speed |
| Grass is too high - Must be set to low cutting height |
| Engine rpm is too low - Open choke fully |
| Cutting height is too low - Use correct cutting height |
| Drive belt installed improperly - Drive belt must be installed correctly |
| Grass patches are not cut |
| Deck clogged with grass clippings - Clean out the mower deck |
| Blades are excessively dull - Need to sharpen the blades |
| Damaged or worn blades - Install new blades |
| Fast mowing speed - Use a slower speed |
| Low cutting height - Adjust mower to higher cutting height |
| Grass bag is full - Empty the grass bag |
| Uneven or bumpy lawn - Roll or level the lawn |
| Cutting level is too low - Raise the cutting height |
| High ground speed - Select a lower speed |
| Incorrect level of mower deck - Level the deck correctly |
| Bent or worn blades - Install new blades |
| Low tire pressure - Check and inflate the tires |
| Tires are not correctly inflated - Correct tire pressure |
| Incorrect level of mower deck - Deck should be adjusted correctly |
| Excessive blade dullness - Need to sharpen the blades |
| Bent or worn blades - Install new blades |
| Mower deck is clogged - Need to clean the mower deck |
| Deck housing is damaged - Replace or rebuild mower deck |
| Loose or faulty mower spindle - Spindle needs to be repaired or replaced |
| Electrical Troubleshooting |
| Battery is not charging |
| Wiring connections are corroded or loose - Tighten or service cable connections |
| Defective battery terminal clamps - Terminal clamps need to be replaced |
| Battery bad cell - Battery replacement required |
| Battery power is low - Battery is drained, charge it |
| Battery drains quickly - Battery needs to be serviced or replaced |
| Faulty battery terminals or disconnected cables - Check wiring connections and replace or clean terminals |
| Battery is low or faulty - Battery needs to be recharged or replaced |
| Wiring is improperly connected or disconnected - Check wiring and connect properly |
| Low battery capacity - Battery needs to be recharged |
| Improperly gapped or dirty spark plug - Clean and gap or replace |
| Starter motor or solenoid is defective - Replace solenoid or repair starter |
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| Lawn and Garden Tractors Technical Specs |
