Home / Lawn and Garden Tractors / Craftsman Lawn Tractors / Craftsman T1200

Craftsman T1200 Troubleshooting

The Craftsman T1200 two-wheel drive lawn tractor was manufactured by MTD built from 2015 to 2020. The components of Craftsman T1200 powerline system: 25.6 cubic inches (420 cc) Zongshen 4P90HU 4-cycle single cylinder 2-valve vertical shaft air-cooled gasoline engine and mechanical CVT transmission with infinite forward and reverse gears.

The engine has a float carburetor, splash lubrication system, and electronic ignition system. The maximum travel speed (forward/reverse): 5.5 mph (8.8 km/h) and 2.3 mph (3.7 km/h).

The Craftsman T1200 lawn tractor is equipped with a manual steering system, mechanical disc brakes, 15x6.00-6 front tires, and 20x8.00-8 rear tires. The wheelbase is 31 inches (780 mm). The tractor is compatible with a 42" mid-mount 2-blade mower deck with a cutting height of 1.5-4.0" (37-100 mm) and manual lifting system.

Engine Troubleshooting
Engine starts up hard or will not start
No gasoline in tank - Add fuel
Incorrect fuel grade - Change fuel
Air in the fuel lines - Bleed the fuel lines
Defective spark plug wire connection - Check spark plug wiring connection, repair or change
Spark plug is defective - Change spark plug as required
Dirty fuel filter - Replace fuel filter
Safety contact for brake pedal defective - Install new part
Problems with carburetor adjustment - Adjust as required
Low engine compression - Inspect cylinder block and change defective components
Unadjusted or worn throttle cable - Change cable or adjust correctly
Irregular engine running
Air intake screen is plugged - Need to wash or clean
Ignition system failure - Inspect ignition system and change faulty parts
Throttle cable is stuck or defective - Replace or clean the cable
Dirty air filter element - Clean or change air filter
Dirty or faulty fuel pump - Service or replace fuel pump
Engine starts and then stalls
Spark plug is faulty - Install new spark plug
Defective or clogged carburetor - Service or repair carburetor
Faulty ignition coil - Replace ignition coil as necessary
Valve springs are damaged or weak - Install new valve springs
Stuck valves - Valves must be cleaned
Engine is overheated
Not enough engine oil - Fill the crankcase with engine oil
Engine is under excessive load - Load reducing required
Plugged cooling fins - Clean and wash as required
Carburetor is running lean - Use proper settings
Ignition timing is improper - Set the ignition timing correctly
Wrong valve setting - Set the valves properly
Engine noise or knocking
Stale or low octane fuel - Change fuel
Engine overload - Load reducing is recommended
Engine oil level is low - Checking oil level and add if necessary
Incorrectly set low idle speed - Adjust the low idle speed
Dirty or faulty fuel pump - Service or change fuel pump
Crankshaft or main bearings wear - Change defective components as required
Valve clearance is not correct - Need to adjust valve clearance
Worn cylinder bore or piston rings - Replace faulty components
Engine loses power
Carburetor is dirty or improperly adjusted - Service or properly adjust carburetor
Air filter element is plugged - Change or service air filter
Fuel pump is faulty or clogged - Service or change fuel pump
Ignition system is defective - Inspect ignition system and change faulty parts
Worn cylinder head gasket - Cylinder-head gasket replacement required
Burned or stuck valves - Service or replace valves
Worn or defective push rod - Install a new push rod
Faulty cylinder block parts - Change defective components
High fuel consumption
Insufficient throttle opening - Adjust or replace throttle cable
Carburetor main jet adjustment is improper - Adjust it correctly
Faulty or loose spark plug - Tighten or change the spark plug
Valves are stuck, burned, or worn - Replace or clean valves
Rings, sleeve, or piston are damaged - Replace defective components as required
Improper valve clearance - Adjustment procedure required
High engine oil consumption
Defective seals or gaskets - Worn parts need to be replaced
Damaged valve stems or valve guides - Valves need to be changed
Piston rings are defective or worn - Change the piston rings as required
Worn piston or cylinder liner - Check liner and piston, change as required
Clogged breather pipe or hose - Change or clean

Transmission Troubleshooting
Hard shifting
Worn or rusty gear shift linkage - Install new shift linkage
Shift forks are bent or worn out - Change the shift forks
Faulty gear shifting mechanism - Faulty parts must be changed
Transmission is excessively noisy
Low oil level - Check transmission oil level and add oil as required
Transmission oil contamination - Change the oil
Worn bearings or gears - Install new bearings or gears
Transmission jumps out of gear
Improperly installed or bent gear shift lever - Replace or install shift lever correctly
Damaged or worn gears - Change defective gears
Worn shift forks or shift rods - Replace damaged rods or forks
Transmission slips
Drive shaft/belt is incorrectly adjusted or worn - Install a new shaft/belt or adjust it
Incorrect clutch/brake adjustment or worn clutch/brake - Install a new brake/clutch or adjust it
Drive sheave is worn or faulty - Change sheave

Hydrostatic Transmission Troubleshooting
Hydrostatic transmission is making noise
Worn or out of adjustment speed control linkage - Adjust or install new linkage
Excessive transmission load - The load should be reduced
Transmission fluid is dirty or fluid level is too low - Add fluid to the correct level or fill the transmission with fresh fluid
Transmission parts are worm or defective - Replace or repair defective components
Hard to shift
Corroded or worn shift linkage - Lubricate or change linkage
Hydrostatic pump is stuck or worn - Change or repair pump
Faulty or misadjusted transmission shift control parts - Adjust properly or change
Power is insufficient
Insufficient transmission fluid - Fill the transmission housing to proper fluid level
Defective or worn drive sheave - Change sheave
Shifting linkage is broken or misadjusted - Adjust correctly or change linkage
Worn or out of adjustment speed control linkage - Replace or adjust linkage
Transmission leaks
Damaged transmission seals or gaskets - Install new gaskets or seals
Leaking final drive shaft - Install new shaft seals
Transmission case is cracked - Install a new transmission case

Mower Deck Troubleshooting
Mower vibrates too much
Damaged or clogged mower drive pulley - Replace or service pulley
Loose or damaged drive belt - Adjust belt tension or change the belt
Cutting blades are bent or unbalanced - Replace or balance blades
Loose blade bolts tightening - Bolts need to be tightened
Discharge chute is regularly plugged
High mowing speed - Need to slow down
Grass is too long - Must be set to low cutting height
Low engine speeds - Choke is not fully opening
Mower deck set to low cutting - Must be set to high cutting height
Drive belt installed improperly - Drive belt must be installed correctly
Grass patches are not cut
Discharge area is clogged - Check cutting deck and clean as necessary
Excessive blade dullness - Need to sharpen the blades
Damaged or worn blades - Blades need to be replaced
Fast ground speed - Need to slow down
Cutting level is too low - Use a higher cutting height
Grass bag is full - Clean grass bag
Blades scalping grass
Bumpy or unleveled lawn - Lawn needs to be leveled
Mower deck set to low cutting - Change cutting height adjustment
High mowing speed - Need to slow down
Deck level is not correct - Level the deck properly
Worn or bent blades - Blades need to be replaced
Tires are not correctly inflated - Check and inflate the tires
Mower deck to cut unevenly
Tires are not correctly inflated - Correct tire pressure
Improper mower deck level - Adjust mower deck level properly
Blades are not sharp - Sharpen the blades
Bent or worn blades - Change the blades
Discharge chute is plugged - Check cutting deck and clean as necessary
Damaged mower deck housing - Replace or repair the deck
Loose or faulty mower spindle - Repair or replace the spindle

Electrical Troubleshooting
Battery is not charging
Wiring connections are loose or corroded - Clean or tighten wiring connections
Battery terminal clamps are defective - Change terminal clamps
Defective battery - Replace the battery
Starter turning slow
Battery capacity is low - Battery is drained, recharge it
Battery is draining quickly - Service charging system or change battery
Disconnected cables or faulty battery terminals - Connect wires properly or change terminals
Starter is not working
Battery is low or faulty - Recharge or replace battery
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly
Battery power is low - Battery is drained, charge it
Spark plug worn or incorrectly gapped - Clean, gap or replace spark plug
Starter motor or solenoid is defective - Change solenoid or repair starter



Lawn and Garden Tractors Technical Specs