Checking Spark Plug Condition & Gap - Kubota RTV500 Operator's Manual

BChecking Spark Plug Condition & Gap
Remove the spark plugs, check condition, and reset the
gap or replace with new plugs as necessary.
1. Raise the cargo bed.
2. Before removing spark plugs, clean the area around
the base of the plug to keep dirt and debris out of the
engine.
3. Remove the spark plug wires from spark plugs.
4. Use a spark plug wrench to remove the spark plugs.
5. Remove plugs and check its condition.
Replace the plug if worn or reuse is questionable.
6. Inspect spark plugs for cracked porcelain, pitted
electrodes, or other wear and damage. Replace the
spark plug if necessary.
(1) Spark plug
A Do not clean the spark plug in a machine using
abrasive grit. Some grit could remain in the spark plug
and enter the engine causing extensive wear and
damage.
Recommended spark plug NGK BKR4E
7. Check the gap using a wire feeler gauge. Adjust the
gap from 0.6 to 0.7 mm (0.024 to 0.028 in.) by carefully
bending the ground electrode.
8. Reinstall the spark plug into the cylinder head.
Tightening torque
(initial)
Retightening torque
PERIODIC SERVICE
12 to 15 N-m
(8.9 to 11 lbf-ft)
23 to 27 N-m
(17 to 19 lbf-ft)
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