Kubota Z231KW-AU, Operator'S Manual

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Symptom (if) Cause Remedy
Rough engine running. • Spark plug damaged. • Adjust the spark plug gap or replace it.
• Spark plug wire damaged. • See your KUBOTA Dealer.
• Carburetion problems. • See your KUBOTA Dealer.
• Ignition coil damaged. • See your KUBOTA Dealer.
• Choke adjusted incorrectly. • See your KUBOTA Dealer.
• Fuel hose or fuel filter clogged or damaged. • Clean or replace fuel lines and see your KU-
BOTA Dealer.
• Improper or stale fuel (fuel quality is poor). • Replace fuel and the fuel filter.
• Air cleaner clogged. • Clean or replace the air cleaner.
Exhaust fumes are colored
(black, dark or gray). • Overload. • Reduce load.
• Low grade fuel used. • Use specified fuel.
• Fuel filter clogged. • Replace the fuel filter.
• Air cleaner clogged. • Clean or replace the air cleaner paper element.
• Choke not fully opened. • Check the choke position.
Exhaust fumes are colored (white
or blue). • Excessive engine oil. • Reduce to the specified oil level.
• Piston ring worn or stuck. • See your KUBOTA Dealer.
Engine overheats. • Engine overloaded. • Lower speed or reduce load.
• Engine oil insufficient. • Fill engine oil.
• The engine air intake screen and cooling fins
are dirty. • Clean the air intake screen and cooling fins.
• Air cleaner paper element plugged. • Clean or replace the air cleaner paper element.
• Engine speed too low. • Operate at “FAST” speed.
• Operating ground speed too fast. • Operate the machine at slower ground speed.
The engine knocks. • Stale or low octane fuel. • Use specified fuel.
• Engine overloaded. • Lower ground speed or reduce load.
• Engine speed too low. • Operate at “FAST” speed.
The engine will not idle. • Spark plug damaged. • Adjust the spark plug gap or replace it.
• Faulty spark plug. • Replace the spark plug.
• Carburetion problem. • See your KUBOTA Dealer.
If you have any questions, contact your local KUBOTA Dealer.
TROUBLESHOOTING
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Z231KW-AU