Kubota Z725 User Manual

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OPERATOR'S MANUAL

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MODELS

ENGLISH

Z723

Z724

Z725

K3811-7121-3

Table of Contents

Questions and Answers:

D
Dana RobinsonAug 22, 2025
How to fix an uneven cut with my Kubota Lawn Mower?
- T
  Tiffany JonesAug 22, 2025
  If your Kubota Lawn Mower is not cutting evenly, several factors could be responsible. The mower deck might not be level, so level the mower deck. You might be moving too fast, so slow down. Dull, worn, or damaged blades can also cause an uneven cut, so sharpen or replace the blades. Check for low tire inflation and add air to correct pressure. Ensure the anti-scalp rollers are adjusted correctly, and verify that both tire pressures are set to the correct pressure.
S
Scott RiggsAug 25, 2025
Why is my Kubota Z725 engine running rough?
- V
  Victor MosesAug 25, 2025
  If your Kubota Lawn Mower engine is running roughly, it could be due to a defective spark plug (adjust the spark plug gap or replace it). Other potential causes include a defective spark plug wire, carburetion problems, or a defective ignition coil, all of which require attention from your Kubota dealer. Additionally, check if the choke is adjusted incorrectly (adjust choke cable), if the fuel hose or fuel filter is clogged or damaged (clean or replace fuel lines, and see your Kubota dealer), if the fuel is improper or stale (replace fuel and the fuel filter), or if the air cleaner is clogged (clean or replace the air cleaner).
D
Dawn PerryAug 26, 2025
Why does the starter not function on my Kubota Z725?
- R
  Richard MorrisAug 26, 2025
  If your Kubota Lawn Mower's starter does not function, it could be due to an overused battery (charge battery sufficiently), a poor terminal connection (clean the terminal and tighten securely), or an expired battery life (replace battery).
L
Lonnie BrooksAug 27, 2025
Why does the blade not rotate on my Kubota Z725 Lawn Mower?
- L
  Lydia WilliamsAug 28, 2025
  If the blade on your Kubota Lawn Mower does not rotate, it could be due to a malfunctioning PTO system, in which case you should see your Kubota Dealer. If the PTO system is normal, the mower belt might be broken, so replace it.
P
Patricia BryanAug 29, 2025
Why are the exhaust fumes from my Kubota Z725 colored black, dark, or gray?
- A
  Amy WilliamsAug 29, 2025
  If the exhaust fumes from your Kubota Lawn Mower are black, dark, or gray, it could be due to several reasons. You might be overloading the mower, so try reducing the load. It could also be caused by using low-grade fuel, so switch to the specified fuel. A clogged fuel filter or air cleaner can also cause this issue, so replace the fuel filter and clean or replace the air cleaner element. Finally, check that the choke is fully opened.
D
Dale RothAug 31, 2025
Why is my Kubota Z725 engine overheating?
- M
  Mary MclaughlinAug 31, 2025
  If your Kubota Lawn Mower engine is overheating, it could be due to several reasons. The engine might be overloaded, so try lowering the speed or reducing the load. Insufficient engine oil can also cause overheating, so replenish the engine oil. Dirty engine air intake screens and cooling fins can restrict airflow, so clean them. A plugged air cleaner element can also lead to overheating, so clean or replace it. Make sure the engine speed isn't too low by operating at the "FAST" speed, and ensure the operating ground speed isn't too fast by operating the machine at a slower ground speed.
B
Benjamin SimsSep 2, 2025
Why is my Kubota Z725 Lawn Mower engine knocking?
- M
  Mark BryanSep 2, 2025
  If your Kubota Lawn Mower engine is knocking, it might be due to stale or low octane fuel, so use the specified fuel. The engine could also be overloaded, so lower the ground speed or reduce the load. Additionally, the engine speed might be too low, so operate at the "FAST" speed.
Y
ydavisSep 3, 2025
What to do if my Kubota Z725 engine stops suddenly?
- J
  Julia MorganSep 4, 2025
  If your Kubota Lawn Mower engine stops suddenly, it's likely due to insufficient fuel. Refuel, and check both the fuel valve and carburetor fuel valve positions.
J
josephhamiltonSep 5, 2025
Why are the exhaust fumes from my Kubota Lawn Mower colored white or blue?
- T
  Timothy CareySep 5, 2025
  If the exhaust fumes from your Kubota Lawn Mower are white or blue, it could indicate excessive engine oil. Reduce the oil level to the specified amount. It may also be caused by a worn or stuck piston ring, in which case you should see your Kubota dealer.
H
Haley WilliamsSep 7, 2025
Why does my Kubota Lawn Mower have insufficient engine power?
- X
  xwallaceSep 7, 2025
  If your Kubota Lawn Mower has insufficient engine power, check the fuel system for insufficient or dirty fuel. Also, a clogged fuel filter or air cleaner can cause this, so replace the fuel filter and clean or replace the air cleaner. A defective spark plug can also be the culprit; adjust the spark plug gap or replace it.

Kubota Z725 Specifications

General

Cutting Width	54 inches
Transmission	Hydrostatic
Deck Material	Steel
Displacement	726 cc
Cutting Height	1.5 - 5 inches
Turning Radius	Zero-turn
Speed Range	0-10 mph forward, 0-5 mph reverse

Summary

SAFE OPERATION

SERVICING OF MACHINE

MOWER MOUNTING

OPERATING THE ENGINE

STARTING THE ENGINE

Procedures for starting the engine correctly.

STOPPING THE ENGINE

Proper steps for shutting down the engine safely.

OPERATING THE MACHINE

OPERATING FOLDABLE ROPS

Procedures for using and folding the Roll-Over Protective Structure.

Motion Control Lever

How to use the motion control levers for movement and steering.

OPERATING THE MOWER

ADJUSTING CUTTING HEIGHT

How to adjust the mower deck's cutting height.

MAINTENANCE

SERVICE INTERVALS

PERIODIC SERVICE

DAILY CHECK

ADJUSTMENT

MOTION CONTROL LEVER

MOWER DECK LEVEL

STORAGE

TROUBLESHOOTING

ENGINE TROUBLESHOOTING

Diagnosing and resolving engine-related problems.

MOWER TROUBLESHOOTING

Diagnosing and resolving mower-specific issues.

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