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John Deere SST16 Troubleshooting
The
John Deere SST16 is a 2WD lawn tractor from SST series. This model was
manufactured from 2000 to 2003. The driveline consists of 29.3 cu.in (480 cc)
Briggs and Stratton 303777 Vanguard 4-cycle V-twin cylinder OHV vertical shaft
air-cooled gasoline engine with a rated power of 16 Hp (11.9 kW), and Tuff Torq
hydrostatic transmission with infinite forward and reverse gears.
The John Deere SST16 is equipped with a hydraulic power steering system,
disc brakes, 13x5.00-16 front tires, and 20x10.00-8 rear tires. The
operating weight is 640 lbs (290 kg). The John Deere SST16 tractor is
compatible with a 42" mid-mount 2-blade mower deck with a cutting height
of 1.0-4.0" (25-102 mm) and mechanical lift system.
| Engine Troubleshooting |
| Engine starts up hard or will not start |
| No gasoline in tank - Fill it up |
| Incorrect fuel grade - Change fuel |
| Water or air in fuel system - Remove air or water from system |
| Spark plug wiring connection is defective - Check the spark plug wire connection, repair or replace |
| Defective spark plug - Change spark plug as required |
| Fuel filter is clogged - Fuel filter needs changing |
| Defective safety switch - Replace if required |
| Carburetor is dirty - Wash, clean and adjust |
| Low engine compression - Inspect cylinder block and change defective components |
| Choke cable is not adjusted properly or worn - Change cable or adjust correctly |
| Air intake screen is plugged - Wash or clean as required |
| Defective ignition - Inspect ignition system and change failed components |
| Faulty or stuck choke cable - Service or change the cable |
| Air filter is dirty - Replace or service air filter |
| Dirty or damaged fuel pump - Clean or change fuel pump |
| Engine starts but immediately stops |
| Damaged spark plug - Replace spark plug |
| Defective or clogged carburetor - Clean or install new carburetor |
| Faulty ignition coil - Ignition coil must be replaced |
| Valve springs are broken or bad - Install new valve springs |
| Stuck valves - Valves must be cleaned |
| Engine oil level low - Checking oil level and add if necessary |
| Engine overload - Load reducing is recommended |
| Air intake grill is clogged - Clean and wash as required |
| Carburetor mixture is too lean - Adjust carburetor correctly |
| Wrong ignition timing - Adjust ignition timing as required |
| Valve setting is wrong - Set the valves properly |
| Low octane fuel - Change gasoline |
| Engine is overloaded - Load reducing required |
| Lack of engine oil - Fill up the engine oil |
| Low idle speed set incorrectly - Adjust idle speed |
| Clogged or defective fuel pump - Clean or replace fuel pump |
| Crankshaft or main bearings wear - Replace crankshaft or bearings |
| Valve clearance is wrong - Adjust valve clearance according to specifications |
| Worn cylinder bore or piston rings - Change faulty parts |
| Incorrectly adjusted or clogged carburetor - Adjust carburetor properly or service it |
| Air filter element is clogged - Replace or service air filter |
| Dirty or damaged fuel pump - Check fuel pump and replace if necessary |
| Ignition system failure - Inspect ignition system and change failed components |
| Cylinder head gasket is worn - Install new head gasket |
| Burned or stuck valves - Replace or service valves |
| Push rod is worn or damaged - Install a new push rod |
| Damaged cylinder block components - Change defective parts |
| Engine using too much gasoline |
| Insufficient throttle opening - Adjust or replace throttle cable |
| Incorrect carburetor main jet adjustment - Adjust the carburetor main jet properly |
| Spark plug is faulty or loose - Replace or tighten spark plug |
| Burned, worn, or stuck valves - Replace or service valves |
| Worn piston, rings, or sleeve - Replace faulty parts |
| Valve clearance is incorrect - Adjust valve clearance |
| Excessive oil consumption |
| Worn seals or gaskets - Replace to repair leaks |
| Valve stems or guides are damaged - Replace defective valves |
| Damaged or seized piston rings - Install new piston rings |
| Cylinder liner or piston is scuffed - Inspect liner and piston, replace as necessary |
| Breather hose or pipe is blocked - Replace or clean |
| Hydrostatic Transmission Troubleshooting |
| HST transmission makes excessive noise |
| Worn or unadjusted speed control linkage - Adjust or install new linkage |
| Excessive transmission load - Reduce loading |
| Oil is dirty or oil level is too low - Add oil to the correct level or fill the transmission with fresh oil |
| Transmission components are damaged or worn - After disassembling and inspection, change defective components |
| Shift linkage is rusty or worn - Lubricate or replace the linkage |
| Hydrostatic pump is blocked or defective - Replace or repair pump |
| Damaged or unadjusted transmission shift control components - Adjust correctly or replace |
| Lack of transmission fluid - Fill the transmission housing to proper fluid level |
| Drive sheave is worn or faulty - Install a new sheave |
| Misadjusted or faulty shifting linkage - Adjust correctly or replace linkage |
| Speed control linkage is worn or unadjusted - Adjust or repair linkage |
| Broken transmission gaskets or seals - Install new seals or gaskets |
| Leaking final drive shaft - Shaft seals need to be changed |
| Transmission housing is cracked - Replace damage housing or transmission assembly |
| Mower Deck Troubleshooting |
| Mower vibrates too much |
| Damaged or clogged mower drive pulley - Replace or service pulley |
| Loose or worn drive belt - Adjust belt tension or install a new belt |
| Bent or unbalanced mower blades - Balance or change as needed |
| Blade bolts are not tightened well - Bolts should be tightened |
| Constant clogging of discharge chute |
| Ground speed is too fast - Use a lower speed |
| Tall grass - Use a lower cutting height |
| Reduced engine speeds - Open throttle fully |
| Cutting height is too low - Use a higher cutting height |
| Incorrect mower drive belt installation - Check drive belt for correct installation |
| Mower deck is clogged - Inspect and clean cutting deck |
| Not sharp blades - Sharpen the blades |
| Defective or worn blades - Blades need to be replaced |
| High mowing speed - Use a slower speed |
| Cutting level is too low - Use correct cutting height |
| Filled bagger - Clean bagger |
| Uneven or bumpy lawn - Lawn leveling required |
| Cutting level is too low - Use a higher cutting height |
| High mowing speed - Select a lower speed |
| Improperly leveled mower deck - Adjust the level of mower deck correctly |
| Bent or worn blades - Replace the blades |
| Low tire pressure - Correct tire pressure |
| Tire pressure is too low - Inflate tires correctly |
| Improper mower deck level - Adjust mower deck level properly |
| Blades are not sharp - Need to sharpen the blades |
| Blades are defective or worn - Change the blades |
| Cutting deck is clogged - Need to clean the mower deck |
| Damaged mower deck shell - Repair or change the deck |
| Mower spindle is faulty or loose - Replace or repair the spindle |
| Electrical Troubleshooting |
| Battery will not charge |
| Electrical wire connections are corroded or loose Tighten or service cable connections |
| Faulty battery terminal clamps - Install new terminal clamps |
| Dead cell in battery - Replace the battery |
| Low battery output voltage - Recharge the battery |
| Battery is draining quickly - Battery needs service or replacement |
| Bad terminals or disconnected battery cables - Connect wiring correctly or install new terminals |
| Battery is discharged or worn - Replace or charge as required |
| Battery cables are disconnected or incorrectly connected - Check cables and connect as needed |
| Battery power is low - Charge the battery |
| Incorrectly gapped or worn spark plug - Clean and gap or replace |
| Defective solenoid or starter motor - Starter/solenoid should be replaced |
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| Lawn and Garden Tractors Technical Specs |
