Toro 520XI - Troubleshooting; Engine Cranks but will Not Start; Starter Does Not Crank; Engine Starts but Does Not Keep Running

TROUBLESHOOTING
Engine cranks but will not start.
Possible Cause Corrective Action
Incorrect starting procedure Ensure throttle is at full, and choke is on
The fuel tank is empty Fill with fresh fuel
The fuel shut-off valve is closed Open fuel shut-off valve
Dirt or water is in the fuel system Drain and flush fuel system; add fresh fuel
Clogged fuel line Clean or replace
The spark plug lead is disconnected Reconnect spark plug
The kill relay not energized Inspect safety switches and wiring
A spark plug is faulty Replace spark plug
Faulty ignition module Replace ignition module
Starter does not crank.
Possible Cause Corrective Action
Blown or loose fuse Determine cause, correct and replace fuse
Battery is discharged Charge battery or replace if necessary
Safety interlock system malfunctioning Inspect safety switches and wiring harness
Faulty starter or starter solenoid Replace
Seized internal engine components Replace
Poor ground; loose connections Clean and tighten
Engine starts but does not keep running.
Possible Cause Corrective Action
Misadjusted or faulty choke or throttle control cable Adjust or replace
The fuel tank vent is restricted Vent system hoses kinked or plugged, clean or repair
Dirt or water in the fuel system Drain and flush fuel system; add fresh fuel
The fuel filter is clogged Replace the fuel filter
The fuel pump is faulty Repair or replace
The carburetor is faulty Clean or rebuild
Loose wires or poor connections Check and tighten wire connections
The cylinder head gasket is faulty Replace
Engine is difficult to start.
Possible Cause Corrective Action
Improper starting procedure Ensure throttle is at full, and choke is on
Dirt or water in the fuel system Drain and flush fuel system, add fresh fuel
Clogged fuel filter Replace
Loose wires or poor connections Troubleshoot and repair
Misadjusted or faulty choke or throttle control cable Adjust or replace
Faulty spark plug Replace
Low compression Test compression, correct as needed
4
GASOLINE ENGINE
5xi Series Tractor Service Manual 4-3