Hyundai HY3100LE User Manual page 16

9.4. Spark Plug
9.4.1. Use - spark plug – BPR5ES or BPR6ES.
9.4.2. The spark plug electrode should be a Tan colour.
9.4.3. Spark plug gap should be 0.7mm to 0.8mm (0.028" to
0.031").
On completion of this operation you MUST make sure that the fuel tap (Cock)
cup is tightened securely.
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