Use left hand to hold the adjust knob, make sure it will not move,
Then use the screwdriver insert into the screw, rotate to right direction for 1/8 circle, check
whether it will spray flame or not?
8.3 If it still spray flame, please rotate to right direction for another 1/8 circle again, now, it
will definitely not spray flame.
8.4 After done the above mentioned 3 steps, if machine still spray flame, the problem is
from the chemicals, some chemicals have very low ignition temperature, it will be very
easy to catch fire.
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