LONCIN 1WG2.5-40FQ-D, Owner'S Manual

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.28.
①
Use a special socket spanner to detach the spark plug.
Warning!
If the engine has just stopped running, the muffler will be very hot. So keep clear of hot
temperature to avoid scald.
②
Check the spark plug. If it is obviously worn or the insulation has any crack or damage, please
replace it, if it has too much carbon deposition; use a wire brush to clean it.
③
Use a clearance gauge to measure the spark plug gap, correct value of which shall be 0.70to
0.80mm.
④
Check whether spark plug washer is good. In order to avoid thread alternating, use hand to screw
spark plug in first.
⑤
After screwing spark plug to the bottom, use a special socket spanner to tighten it and the washer
below it.
Note!
If the spark plug is a new one, tighten the spark plug further by 1/2 turn after the washer is pressed
down tightly.
If the spark plug has been used, tighten it further by 1
／
8
一
l
／
4 turn after the washer is pressed down
tightly.
The spark plug must be tightened adequately, or it will be heated and damage the engine.
Special socket spanner for spark plug