Spark Plug
Spark plug type: BP6ES, BPR6ES (NGK) or NHSPLD F6RTCU
Proper spark plug clearance ensures the engine’s normal running under no deposit
around the spark plug.
a) Remove the spark plug by means of spark plug wrench.
WARNING
Be careful not to touch the muffler during or just after the engine has
been running.
b) Clean the spark plug with a steel brush. If the insulator is damaged, replace
the spark plug.
c) Measure the spark plug clearance with a feeler. The clearance should be 0.7-
0.8mm. If adjustment is necessary, bend the side electrode carefully.
d) Check if the spark plug gasket is in good conditions, or replace with a new
one. Screw on the spark plug to the bottom first by hand and then tighten it
up by a spark plug wrench. If a new spark plug is used, twist 1/2 more turns
after impacting the gasket; if reinstall the original one, just twist 1/8-1/4
more turns
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