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Husqvarna CT151 Troubleshooting
The
Husqvarna CT 151 lawn tractor was manufactured from 2004 to 2010. The components
of Husqvarna CT151 powerline system: a 29.1 cu.in (477 cc) Kohler Courage SV470
4-cycle single-cylinder vertical shaft air-cooled gasoline engine and Dana D6800
mechanical transmission with 6 forward and 1 reverse gears.
The engine has a cylinder bore of 3.30" (84 mm), piston stroke of 3.38"
(86 mm), rated power of 15 hp (11.2 kW), and max torque of 34.3 Nm (25
lb-ft) at 2600 rpm. Max. travel speed (forward/reverse): 4.9 mph (7.8
km/h) and 1.6 mph (2.5 km/h).
The lawn tractor was equipped with a manual steering system, disc
brakes, 15x6.00-6 front tires, and 18x9.50-8 rear tires. The wheelbase
is 46.9 in (1190 mm). The Husqvarna CT151 is compatible with a 36"
mid-mount 2-blade mower deck with cutting height of 1.0-3.5 in (25-90
mm), six cut positions, two anti-scalp wheels, and mechanical lift
system.
| Engine Troubleshooting |
| Engine hard starting or not starting |
| No gasoline in tank - Fill gasoline up |
| Low-quality gasoline - Use correct fuel grade |
| Air in the fuel lines - Bleed the fuel lines |
| Loose or disconnected spark plug wire - Inspect spark plug wiring connection, change or repair |
| Spark plug is faulty - Spark plug need to be replaced |
| Fuel filter is plugged - Fuel filter needs to be replaced |
| Defective safety switch - Replace if required |
| Carburetor malfunction - Check and repair as required |
| Bad compression - Check and change damaged parts |
| Throttle cable is worn or adjusted improperly - Adjust correctly or replace the cable |
| Air intake screen is plugged - Clean and wash as required |
| Defective ignition - Check ignition and replace faulty components |
| Defective or stuck choke cable - Service or change the cable |
| Air filter element is plugged - Service or replace air filter |
| Fuel pump is defective or dirty - Check fuel pump and replace if necessary |
| Engine starts but stops suddenly |
| Faulty spark plug - Change spark plug |
| Defective or dirty carburetor - Clean or install new carburetor |
| Faulty ignition coil - Ignition coil should be replaced |
| Weak or damaged valve springs - Replace valve springs |
| Valves sticking - Clean the valves |
| Engine oil level low - Need to add engine oil |
| Engine is overloaded - Reduce the load |
| Cooling fins are plugged - Clean and wash as required |
| Too lean fuel mixture in carburetor - Set the carburetor correctly |
| Ignition timing is improper - Adjust ignition timing correctly |
| Valve setting is incorrect - Set the valves correctly |
| Stale or low octane fuel - Use correct gasoline |
| Engine overloaded - Reduce the load |
| Engine oil insufficient - Need to add engine oil |
| Wrong adjustment of low idle speed - Correct idle settings |
| Clogged or defective fuel pump - Test fuel pump and replace if necessary |
| Crankshaft or main bearings wear - Need to install new components |
| Improper valve clearance - Adjust valve clearance according to specifications |
| Damaged cylinder bore or piston rings - Replace defective components |
| Improperly or clogged carburetor - Clean or properly adjust carburetor |
| Dirty air filter element - Replace or clean air filter |
| Dirty or damaged fuel pump - Service or replace fuel pump |
| Defective ignition system - Inspect ignition system and change failed components |
| Damaged cylinder-head gasket - Replace cylinder head gasket |
| Valves are stuck or burned - Service or change valves |
| Push rod is worn or bent - Push rod needs to be changed |
| Cylinder block parts are faulty - Defective parts need to be replaced |
| Choke opening is not full - Replace or adjust choke cable |
| Carburetor main jet adjustment is improper - Adjust main jet as required |
| Spark plug is faulty or loose - Spark plug need to be replaced or tightened |
| Worn, stuck, or burned valves - Change or clean valves |
| Rings, sleeve, or piston are damaged - Replace defective parts as required |
| Improper valve clearance - Adjustment procedure required |
| Excessive engine oil consumption |
| Worn seals or gaskets - Replace to repair leaks |
| Worn valve stems and valve guides - Valves replacement required |
| Piston rings are stuck or worn - Have piston rings replaced |
| Scored cylinder liner or piston - Inspect liner and piston, fit new parts as necessary |
| Plugged breather pipe or hose - Change or clean |
| Transmission Troubleshooting |
| Gear shift is hard |
| Stuck or worn gear shift linkage - Shift linkage need to be replaced |
| Worn or damaged shift forks - Change the shift forks |
| Faulty parts in the gear shifting mechanism - Change faulty parts |
| Not enough fluid in transmission - Need to add fluid |
| Transmission fluid contamination - Change transmission fluid |
| Damaged bearings or gears - Change faulty parts |
| Transmission jumping out of gear |
| Incorrectly installed or bent shift lever - Replace or install shift lever correctly |
| Damaged or worn gears - Replace gears |
| Worn shift forks or shift rods - Change defective forks or rods |
| Drive shaft/belt is damaged or improperly adjusted - Install a new shaft/belt or adjust it |
| Incorrect clutch/brake adjustment or worn clutch/brake - Adjust clutch/brake or install a new one |
| Worn or damaged drive sheave - Change sheave |
| Mower Deck Troubleshooting |
| Mower vibrates too much |
| Drive sheave of mower deck is dirty or worn - Clean or replace sheave |
| Loose or damaged drive belt - Belt needs to be adjusted or replaced |
| Bent or unbalanced mower blades - Balance or change blades |
| Blade mounting bolts are loose - Tighten bolts as required |
| Discharge chute is constantly plugged |
| High ground speed - Select a lower speed |
| Tall grass - Need to set low cutting height |
| Reduced engine speeds - Open choke fully |
| Mower cuts too low - Need to set high cutting height |
| Incorrect mower drive belt installation - Install drive belt correctly |
| Lawn mower leaving uncut grass |
| Discharge area is clogged - Clean out the mower deck |
| Blades are too dull - Sharpen the blades |
| Blades are worn or damaged - Blades must be changed |
| High mowing speed - Use a slower speed |
| Cutting height is too low - Must be set to high cutting height |
| Filled bagger - Bagger must be empty |
| Lawn is not level or bumpy - Roll or level the lawn |
| Cutting level is too low - Use correct cutting height |
| Ground speed is too fast - Need to slow down |
| Deck level is not correct - Adjust mower deck level properly |
| Worn or bent blades - Blades must be changed |
| Incorrect tire pressure - Inflate tires correctly |
| Incorrect tire pressure - Correct tire pressure |
| Improperly leveled mower deck - Adjust mower deck level properly |
| Excessive blade dullness - Need to sharpen the blades |
| Damaged or worn blades - Install new blades |
| Discharge area is clogged - Clean out the mower deck |
| Deck housing is damaged - Repair or change the deck |
| Mower spindle is faulty or loose - Replace or repair the spindle |
| Electrical Troubleshooting |
| Battery is not charging |
| Electrical wire connections are loose or corroded - Clean or tighten wiring connections |
| Defective electrical terminal connectors - Replace terminal connectors |
| Battery failing - Battery replacement required |
| Battery capacity is low - Recharge the battery |
| Battery drains quickly - Service charging system or change battery |
| Terminals are faulty or battery cables are disconnected - Check wiring and clean or replace terminals |
| Battery is low or faulty - Replace or charge as required |
| Battery cables are disconnected or improperly connected - Inspect cables and connect properly |
| Battery voltage is low - Recharge the battery |
| Spark plug worn or incorrectly gapped - Clean and gap or replace |
| Starter motor or solenoid is damaged - Starter/solenoid needs to be replaced |
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| Lawn and Garden Tractors Technical Specs |
