Troubleshooting - Murray MYZ4219000 Operator's Manual

9.

Troubleshooting

WARNING: Before performing any type of maintenance, disengage all controls and stop the engine. Wait until all
moving parts have come to a complete stop. Disconnect spark plug wire and ground it against the engine to prevent
unintended starting. Always wear safety glasses during operation or while performing any adjustments or repairs.
NOTICE: If you can't solve the problems of the machine, take the mower to an authorized service center for assistance.
Troubleshooting the Mower
PROBLEM LOOK FOR
The engine will not start. The parking brake is not engaged.
The fuel tank is empty.
The PTO switch is in the ON position.
The engine is flooded.
The battery terminals are dirty.
The battery is discharged or dead.
Loose or broken wiring.
The engine starts hard or runs The fuel mixture is too much.
poorly.
The engine knocks. Low oil level.
Incorrect grade of oil.
Excessive oil consumption. The engine is too hot.
Incorrect grade of oil.
Too much oil in crankcase.
The engine exhaust is black. The air filter is dirty.
The choke is closed.
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REMEDY
Move the two drive control levers outward
into the park position.
If engine is hot, let it cool, and then fill the
fuel tank again.
Move the PTO switch to the OFF position.
Disengage the choke.
Refer to "Replacing the Battery; Cleaning
the Battery and Battery Cables" section.
Charge or replace the battery.
Visually check wiring. If wires are frayed or
broken, see an Authorized Service Center.
Clean the air filter.
Check and add oil as required.
Refer to the "Changing Engine Oil"
section.
Check the engine fins, blower screen,
and air filter.
Refer to the "Changing Engine Oil"
section.
Drain excess oil.
Refer to the "Changing the Air Filter" section.
Open the choke.
ZERO TURN MOWER
The engine runs, but the mower The transmission is in neutral.
will not drive.
The bypass valve is in the open position.
When the control lever is in neutral state,
the hydraulic bridge parking gear plate
engages.
The drive belt fell off.
The mower steers hard or The tires are not inflated correctly.
handles poorly.
The mower cut is uneven. The tires are not correctly inflated.
Cutting deck uneven.
The mower cut looks rough. The engine speed is too slow.
The ground speed is too fast.
Cutting blade wear.
The engine stalls easily with the The engine speed is too slow.
mower blades engaged.
The ground speed is too fast.
Dirty or clogged air cleaner.
Height-of-Cut is too low.
The engine is not at the operating
temperature.
The engine starts, and the The Power-Take Off (PTO) is disengaged.
machine drives, but the mower
Electromagnetic clutch wiring detachment.
will not cut.
NOTE: For all other problems, contact an Authorized Service Center.
ZERO TURN MOWER
Move the drive control levers into the
forward gear.
Close bypass valve.
Check if the hydraulic bridge tension
spring has fallen off. If it has, please go to
an authorized center for repair.
Please go to an authorized center for
maintenance.
Refer to the "Check Tire Pressure" section.
Refer to the "Check Tire Pressure" section.
Refer to the "Leveling the Cutting Deck"
section.
Set to throttle lever to FAST.
Slow down.
Check and replace a new blade if necessary.
Set to throttle lever to FAST.
Slow down.
Refer to "Changing the Air Filter" section.
Cut tall grass at maximum Height-of-Cut
during first pass, or follow the "1/3 Rule
during operation.
START the engine and let it warm up for
several minutes.
Engage the PTO.
Checking the wiring port. If it fell or is
damaged, please go to an authorized
center for maintenance.
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