Checking Spark Plug Condition & Gap; Replacing Engine Oil Filter - Kubota Z723 Operator's Manual

56 PERIODIC SERVICE
BChecking Spark Plug Condition & Gap
Remove the spark plugs, check condition, and reset the
gap or replace with new plugs as necessary.
1. Before removing spark plugs, clean the area around
the base of the plug to keep dirt and debris out of the
engine.
2. Disconnect the spark plug cap from spark plugs.
3. Use a spark plug wrench to remove the spark plugs.
4. Remove plugs and check its condition.
Replace the plug if worn or reuse is questionable.
5. Inspect spark plugs for cracked porcelain, pitted
electrodes, or other wear and damage. Replace the
spark plug if necessary.
(1) Spark plug cap and 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, which may cause extensive
wear and damage.
Recommended spark plug Champion XC12YC
6. Check the gap using a wire feeler gauge. Adjust the
gap to 0.76 mm (0.030 in.) by carefully bending the
ground electrode.
(A) 0.76 mm (0.030 in.)
7. Reinstall the spark plug into the cylinder head.
Tightening torque
BReplacing Engine Oil Filter
To avoid serious injury:
A Engine oil is a toxic substance. Dispose of
used oil properly.
authorities for approved disposal methods or
possible recycling.
To avoid serious injury:
A Be sure to stop the engine and remove the key
before changing the oil and the oil filter
cartridge.
A Allow engine to cool down sufficiently; oil can
be hot and may cause burns.
27 N-m
(20 lbf-ft)
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