Kubota Z723, Operator'S Manual

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74 TROUBLESHOOTING
ENGLISH
If you have any questions, contact your local KUBOTA Dealer.
Engine stops suddenly.
A
Insufficient fuel.
A
Refuel.
A Check the fuel valve position.
A
Check the carburetor fuel valve
position.
Rough engine running.
A
Spark plug defective.
A
Adjust the spark plug gap or replace it.
A Spark plug wire defective. A See your Kubota dealer.
A
Carburetion problems.
A
See your Kubota dealer.
A
Ignition coil defective.
A
See your Kubota dealer.
A
Choke is adjusted incorrectly.
A
Adjust choke cable.
A Fuel hose or fuel filter clogged or
damaged. A Clean or replace fuel lines, and see
your Kubota dealer.
A
Improper or stale fuel.
(Fuel quality is poor.)
A
Replace fuel and the fuel filter.
A Air cleaner is clogged. A Clean or replace the air cleaner.
Exhaust fumes are colored.
(Black, Dark or Gray)
A
Overload.
A
Reduce load.
A
Low grade fuel is used.
A
Use specified fuel.
A
Fuel filter is clogged.
A
Replace the fuel filter.
A Air cleaner is clogged. A Clean or replace the air cleaner
element.
A
Choke is not fully opened.
A
Check the choke position.
Exhaust fumes are colored.
(White or Blue)
A
Excessive engine oil.
A
Reduce to the specified oil level.
A Piston ring is worn or stuck. A See your Kubota dealer.
Engine overheats.
A
Engine is overloaded.
A
Lower speed or reduce load.
A
Engine oil is insufficient.
A
Replenish engine oil.
A
Engine air intake screen and cooling
fins are dirty.
A
Clean the air intake screen and cooling
fins.
A
Air cleaner element is plugged.
A
Clean or replace the air cleaner
element.
A
Engine speed is too low.
A
Operate at the "FAST" speed.
A Operating ground speed is too fast. A Operate the machine at the slower
ground speed.
Engine knocks.
A
Stale or low octane fuel.
A
Use specified fuel.
A
Engine overloaded.
A
Lower ground speed or reduce load.
A Engine speed is too low. A Operate at the "FAST" speed.
Engine will not idle.
A
Spark plug defective.
A
Adjust the spark plug gap or replace it.
A
Faulty spark plug.
A
Replace the spark plug.
A
Carburetion problem.
A
See your Kubota dealer.
Symptom (If) Cause Remedy