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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 |