Kubota ZG222A-AU, Operator'S Manual

Page: 78 / 105

61 PERIODIC SERVICE
B
Checking Spark Plug Condition & Gap
Remove the spark plugs, check condition, and reset the
gap or replace with new plugs as necessary.
1. Open the hood.
2. Before removing spark plugs, clean the area around
the base of the plug to keep dirt and debris out of the
engine.
3. Disconnect the spark plug cap 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.
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.
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.
(1) Spark plug cap and spark plug
Recommended spark plug NGK BPR6HS
Tightening torque
9.8 to 19.6 N-m
(7.2 to 14.5 lbf-ft)