Kubota RTV500 Operator's Manual page 92

74 TROUBLESHOOTING
Trouble
Rough engine running.
Exhaust fumes are colored.
(Black, Dark or Gray)
Exhaust fumes are colored.
(White or Blue)
Engine overheats.
Engine diagnostic light
comes on.
Engine will not idle.
If you have any questions, consult your local KUBOTA Dealer.
Cause
A Spark plug defective.
A High tension cord defective.
A Ignition coil defective.
A Fuel hose or fuel filter clogged or
damaged.
A Improper or stale fuel.
(Fuel quality is poor.)
A Air cleaner is clogged.
A Overload.
A Low grade fuel is used.
A Air cleaner is clogged.
A Excessive engine oil.
A Piston ring is worn or stuck.
A Engine is overloaded.
A Engine oil is insufficient.
A Low coolant level.
A The motor driven fan does not turn.
A Dirty radiator core or grille screens.
A Coolant flow route corroded.
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A Spark plug defective.
A Faulty spark plug.
Countermeasure
A Adjust the spark plug gap or replace it.
A Consult your KUBOTA Dealer.
A Consult your KUBOTA Dealer.
A Clean or replace fuel lines, and consult
your KUBOTA Dealer.
A Replace fuel and
KUBOTA Dealer.
A Clean or replace the air cleaner
element.
A Reduce load.
A Use specified fuel.
A Clean or replace the air cleaner
element.
A Reduce to the specified oil level.
A Consult your KUBOTA Dealer.
A Lower speed or reduce load.
A Replenish engine oil.
A Fill cooling system to the correct level;
check radiator and hoses for loose
connections or leaks.
A Check to see if the fuse is not blown.
A Check the electric system.
A Remove all trash.
A Flush cooling system.
A Consult your KUBOTA Dealer.
A Adjust the spark plug gap or replace it.
A Replace the spark plug.
consult your