Kubota RTV400 Operator's Manual page 86

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 cooling air inlet is clogged.
A Engine cooling fin is dirty with debris
accumulated.
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A Spark plug defective.
A Faulty spark plug.
A Incorrect idle adjustment
A Throttle link and governor link are not
put back in place, being caught with a
stone, debris, etc.
TROUBLESHOOTING
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 Remove all trash.
A Clean engine cooling fin.
A Consult your KUBOTA Dealer.
A Adjust the spark plug gap or replace it.
A Replace the spark plug.
A Consult your KUBOTA Dealer.
A Remove any debris from around
throttle link and governor link.
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consult your