General Troubleshooting
Problem
Possible Cause
Corrective Action
The blade control switch (PTO) is
engaged.
Move the blade-control switch (PTO) to
the disengaged position.
The parking brake is not engaged.
Move the motion control levers to the
neutral lock (Park) position.
The battery is dead.
Charge the battery.
The electrical connections are corroded
or loose.
Check the electrical connects for good
contact.
A switch is worn or damaged.
Test and replace faulty switch.
The starter does not crank
The fuse is blown.
Replace the fuse.
The fuel tank is empty.
Fill the fuel tank.
The throttle is not in the correct position.
Be sure that the throttle control is
always in the fast positions.
There is dirt in the fuel filter.
Replace the fuel filter.
There is dirt, water, or stale fuel in the
fuel system.
Clean and flush the fuel system.
The air cleaner is dirty.
Clean or replace the air cleaner
element.
The seat switch is not functioning
properly.
Check the seat-switch and replace if
faulty.
The electrical connections are
corroded, loose, or damaged.
Check the electrical connections for
good contact. Clean the connector
terminals thoroughly with electrical
contact cleaner and apply dielectric
grease.
The spark plug is fouled or improperly
gapped.
Adjust or replace the spark plug.
The ignition coil(s) have failed.
Test and replace faulty coil(s).
The spark plug wire is not connected.
Check the spark plug wire connection.
The engine does not start, starts
hard, or fails to keep running
A switch is worn or damaged.
Test and replace faulty switch.
The engine load is excessive.
Reduce the ground speed or raise
height-of-cut.
The air cleaner is dirty.
Clean or replace the air cleaner
element.
The oil level in the crankcase is low.
Add oil to the crankcase.
The cooling fins and air passages
above the engine are plugged.
Remove the obstruction and thoroughly
clean cooling fins and the air passages.
One of the ignition coils has failed.
Test and replace the faulty coil.
The fuel tank vent system is plugged.
Inspect fuel tank vent system for
obstruction and repair system.
There is dirt in the fuel filter.
Replace the fuel filter.
Engine loses power
There is dirt, water, or stale fuel in the
fuel system.
Clean and flush the fuel system.
4000 Series Z MASTER® Service Manual
Page 3–3
Troubleshooting: General Troubleshooting
3442-427 Rev A
Summary of Contents for Z Master 4000 Series
Page 2: ...Revision History Revision History Page 2 4000 Series Z MASTER Service Manual 3442 427 Rev A...
Page 6: ...Preface Page 6 4000 Series Z MASTER Service Manual 3442 427 Rev A...
Page 108: ...Electrical Service and Repairs Page 8 14 4000 Series Z MASTER Service Manual 3442 427 Rev A...
Page 111: ...Drawing Rev A Sheet 1 3442 427 Rev A Page A 3 Electrical Schematic g342795...
Page 112: ...Page A 4 3442 427 Rev A Drawing Rev Sheet Electrical PTO Engaged Schematic g346038...
Page 113: ...Drawing Rev Sheet 3442 427 Rev A Page A 5 Electrical Run Position g346039...
Page 114: ...Page A 6 3442 427 Rev A Drawing Rev Sheet Electrical Start Position g346040...