Kubota KBL31 Owner'S/Operator'S Manual Download Page 13

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CARBURETOR ADJUSTMENT

This Handheld Blower is equipped with non-adjustable fuel mixture carburetor. The engine idle 

speed is the only adjustment for the operator.

Wear the recommended personal protective equipment and observe all safety instructions. 

Engine Idle Speed:

When the throttle trigger and the throttle setting lever is idle position the engine should return to an 

idle speed between 2700 and 3300 RPM. The engine should not stall (stop running) at engine idle 

speed.

To adjust the engine idle speed, rotate the idle 

speed adjustment screw on the carburetor.

•  Turn the idle speed screw in (clockwise) 

to increase the engine idle speed.

•  Turn the screw out (counterclockwise) 

to decrease the engine idle speed.

If idle speed adjustment is necessary, and 

after adjustment the engine stalls, stop using 

the Handheld Blower immediately! 

Contact your local authorized KUBOTA Dealer for assistance and servicing.

 

WARNING

Idle speed adjustment should be checked each time the unit is operated.

 

WARNING

POTENTIAL HAZARD

Engine must be running to make carburetor adjustments.

When engine is running, fan is rotating and other parts are moving.

WHAT CAN HAPPEN

Contact with rotating fan or other moving parts could cause serious personal injury or death.

HOW TO AVOID THE HAZARD

Keep hands, feet and clothing away from fan and other moving parts.

Keep all bystanders and pets away from unit while making carburetor adjustments.

Idle Speed

Adjuster Screw

Summary of Contents for KBL31

Page 1: ...KBL31 Owner s Operator s Manual Completely read and understand this manual before using this product...

Page 2: ...ge You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure Failure to comply with the instructions...

Page 3: ...KBL31 PRODUCT DESCRIPTION PIPE B PIPE A STOP SWITCH HANDLE FAN COVER AIR INTAKE SCREEN AIR CLEANER ENGINE RECOIL STARTER SERIAL NUMBER ON THE TOP OF CRANKCASE FUEL TANK THROTTLE SETTING LEVER THROTTLE...

Page 4: ...mes can cause death Never start or run the engine inside a close room or building Hot Surface Warning Contact may cause burns During use and for some time after stopping the engine the engine is very...

Page 5: ...gs or medication 9 Never start or run the engine inside a closed room or building Breathing exhaust fumes can cause death 10 Keep handles clean of oil fuel and dirt The warning system in This manual i...

Page 6: ...ighly flammable and must be handled and stored carefully Use a container approved for storing petrol and or fuel oil mixture 2 Mix and pour fuel outdoors and where there are no sparks or flames 3 Do n...

Page 7: ...p the machine quickly in an emergency For information on how to stop the engine refer to the Starting and Stopping Procedures on page 10 12 Do not point the Handheld Blower nozzle in the direction of...

Page 8: ...s BLOWER PIPES INSTALLATION 1 Align groove in pipe A with pegs on blower housing and slide pipe A on to housing 2 Rotate pipes A clock wise to lock it into place 3 Align groove in pipe B with pegs on...

Page 9: ...moke when handling petrol and stay away from an open flame or where petrol fumes may be ignited by a spark Store petrol in an approved container and keep it out of the reach of children Never buy more...

Page 10: ...l and the petrol before filling the fuel tank on the Handheld Blower NOTE 1 Never mix petrol and oil directly in the Handheld Blower fuel tank 2 Do not use National Marine Manufacturer s Association N...

Page 11: ...nd animals away from the working area 1 Pump the primer bulb at the bottom of the carburetor until fuel can be seen flowing through the fuel return line to the fuel tank Flowing fuel should be almost...

Page 12: ...gine starts HOT RESTART To start the engine that is already warmed up hot restart or if the ambient temperature exceeds 20 C 1 Pump the primer bulb at the bottom of the carburetor until fuel can be se...

Page 13: ...the engine idle speed Turn the screw out counterclockwise to decrease the engine idle speed If idle speed adjustment is necessary and after adjustment the engine stalls stop using the Handheld Blower...

Page 14: ...he lowest throttle setting to do the job Maintenance replacement or repair of emission control devices and systems may be performed by any repair establishment or individual however war ranty repairs...

Page 15: ...of the fuel pick up hose inside the tank To replace the fuel filter 1 Make sure the fuel tank is empty 2 Loosen the fuel tank cap and pull up and remove the cap holder 3 Using a wire hook gently pull...

Page 16: ...uple of times to loosen the boot then pull the boot off of the spark plug 2 Remove the spark plug 3 Clean the electrodes with a stiff brush 4 Adjust the electrode air gap to 0 6 0 7 mm 024 028 in 5 Re...

Page 17: ...ould cause a burn HOW TO AVOID THE HAZARD Make sure the muffler is cool before inspecting and cleaning the spark arrester Spark Arrester Maintenance 1 With the engine at ambient room temperature loose...

Page 18: ...leaner cover see cooling fin cleaning 2 Twist the high tension lead boot on spark plug back and forth a couple of times to loosen the boot then pull the boot of the spark plug 3 Remove the four screws...

Page 19: ...into a suitable fuel storage container approved for petrol 2 Pump the primer bulb on the carburetor until all fuel is discharged through the clear fuel return hose 3 Run the engine to remove any fuel...

Page 20: ...Every 100 hours Check and replenish fuel Check for fuel leakage Check bolts nuts and screws for tightness or missing Check engine idle speed adjustment Clean air filter element Remove dust and dirt f...

Page 21: ...MEMO...

Page 22: ...MEMO...

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Page 24: ...lia Pty Ltd 25 29 Permas Way Truganina Vic 3029 Australia REGARDING EXHAUST GAS REGULATION This engine is certified US EPA Regulatory authority Emission standard Certificate Number United States Envir...

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