Kubota F3690 User Manual

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F2890

F3690

MODELS

OPERATOR'S MANUAL

1BDAIAZAP0010

English (AUS)

Code No. K3603-6291-1

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PRINTED IN JAPAN

©

KUBOTA Corporation 2013

READ AND SAVE THIS MANUAL

Table of Contents

Questions and Answers:

A
Audrey HowardAug 13, 2025
Why is my Kubota F3690 Lawn Mower engine difficult to start?
- L
  Lisa JacksonAug 13, 2025
  If your Kubota Lawn Mower engine is hard to start or won't start, here's what to check: * **Fuel:** Make sure you have enough fuel. Check the fuel tank and fuel filter, replacing the filter if needed. * **Fuel System:** If air or water is in the fuel system, tighten the fuel line coupler bolt and nut. Bleed the fuel system. * **Oil Viscosity:** In winter, use oils of different viscosities depending on the temperature. Consider using an engine block heater. * **Battery:** Clean the battery cables and terminals. Charge the battery. In cold weather, remove the battery, charge it, and store it indoors, installing it only when you're ready to use the machine.
D
Dawn BarberAug 17, 2025
Why from beginning starter does not function, and lights soon become dim on Kubota F3690 Lawn Mower?
- A
  Alexandria JohnsonAug 17, 2025
  If the starter doesn't function from the beginning and the lights soon become dim on your Kubota Lawn Mower, it indicates insufficient charging. Charge the battery sufficiently.
L
Leslie WashingtonAug 21, 2025
Why is my Kubota F3690 Lawn Mower engine overheating?
- D
  Daniel NelsonAug 21, 2025
  If your Kubota Lawn Mower engine overheats, consider these potential causes and solutions: * **Engine Overload:** Shift to a lower gear or reduce the load. * **Low Coolant:** Fill the cooling system to the correct level and inspect the radiator and hoses for leaks. * **Fan Belt:** Adjust or replace the fan belt if it's loose or defective. * **Dirty Screen:** Remove any trash from the radiator or bonnet screen. * **Coolant Flow:** Flush the cooling system if the coolant flow route is corroded.
J
Justin CastilloAug 25, 2025
Why are the exhaust fumes colored on my Kubota F3690?
- S
  sherihendricksAug 26, 2025
  If the exhaust fumes from your Kubota Lawn Mower are colored, it could be due to several reasons: * **Fuel Quality:** Poor fuel quality can cause this. Change the fuel and fuel filter. * **Oil Level:** Too much oil can also be a factor. Check the proper amount of oil. * **Air Cleaner:** A clogged air cleaner might be the problem. Clean or replace the element. * **Other issues:** If the inside of the exhaust muffler is filled with fuel, heat the muffler by applying a load to the engine. Problems with the injection nozzle or poor fuel quality can also contribute. Check the injection nozzle and change the fuel and fuel filter.
J
Joshua GregoryAug 28, 2025
What to do if Kubota F3690 does not move while engine is running?
- R
  Robert TorresAug 29, 2025
  If your Kubota Lawn Mower doesn't move while the engine is running, check if the parking brake is on and release it. Also, verify the transmission fluid level and replenish oil if it's insufficient.
H
hullmichaelSep 1, 2025
Why are Kubota F3690 Lawn Mower terminals severely corroded and heat up?
- B
  Brooke ChangSep 1, 2025
  If the terminals of your Kubota Lawn Mower are severely corroded and heat up, it's likely due to a poor terminal connection. Clean the terminal and tighten it securely.
C
Cynthia SextonSep 5, 2025
Why when viewed from top, the top of plates looks whitish on Kubota F3690?
- K
  Kim SilvaSep 5, 2025
  If the top of the plates looks whitish when viewed from the top on your Kubota Lawn Mower, it could be because the battery was used with an insufficient amount of electrolyte or used too much without recharging. Add distilled water and charge the battery, or charge the battery sufficiently.
M
Mrs. Nancy KingSep 9, 2025
Why battery electrolyte level drops rapidly on Kubota F3690?
- T
  tgonzalezSep 9, 2025
  If the battery electrolyte level drops rapidly in your Kubota Lawn Mower, it suggests there's a crack or pinholes in the electrolytic cells. Replace the battery.

Kubota F3690 Specifications

General

Engine Model	Kubota D1105
Transmission	Hydrostatic
Drive	4WD
Deck Lift	Hydraulic
Blade Tip Speed	18, 000 fpm
Engine Type	3-cylinder, liquid-cooled diesel
Engine Power	36 HP
Cutting Width	72 inches
Turning Radius	Zero-turn
Deck Type	Side discharge

Summary

FOREWORD

SAFETY FIRST

Explains the safety alert symbol and different warning levels (DANGER, WARNING, CAUTION).

INSTRUMENT PANEL AND CONTROLS

PRE-OPERATION AND ENGINE OPERATION

STARTING THE ENGINE

Step-by-step guide to safely start the engine.

STOPPING THE ENGINE

OPERATING THE MACHINE AND ROPS

OPERATING NEW MACHINE

OPERATING FOLDABLE ROPS

STARTING PROCEDURES

Selecting the Travel Speed

CHECK DURING DRIVING AND PARKING

CHECK DURING DRIVING

Monitoring the Easy Checker system for warnings during operation.

PARKING

MAINTENANCE

SERVICE INTERVALS

Chart detailing maintenance tasks and their recommended intervals.

LUBRICANTS, FUEL AND COOLANT

Specifications and types of lubricants, fuel, and coolant required.

PERIODIC SERVICE

DAILY CHECK

Routine inspections to perform before operating the machine.

Checking Engine Oil Level

Procedure for checking the engine oil level and adding oil if needed.

Checking Amount of Fuel and Refueling

How to check fuel level and safely refuel the machine.

Checking Transmission Fluid Level

How to check the transmission fluid level and add if necessary.

MAINTENANCE BY OPERATING HOURS

EVERY 50 HOURS

EVERY 100 HOURS

Battery, air cleaner, fuel lines, and brake pedal checks.

EVERY 200 HOURS

EVERY 400 HOURS

EVERY 2 YEARS

TROUBLESHOOTING

ENGINE TROUBLESHOOTING

Common engine issues and their causes and corrective actions.

POWER TRAIN TROUBLE SHOOTING

BATTERY TROUBLESHOOTING

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