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（１）点火提前角的调整汽油机应在活塞位于上死点前３０“时，火花塞跳火。在磁电机飞轮上有２条刻线，２线与轴心夹角为３０°，将飞轮沿顺时针方向转动，当第１条长刻线与曲轴箱上的刻线对齐时，活塞顶在上死点前为３０°，是断电器应开间隙（非全开）。如果当沿顺时针方向
(1) Ignition advance angle adjustment Gasoline spark plug should be sparked when the piston is 30 "before top dead center. There are 2 scribing lines on the magneto flywheel, the angle between the 2 line and the axis is 30 °, and the flywheel along Turn clockwise, when the first long line and the crankcase alignment line, the top of the piston in the top dead center of 30 °, the breaker should open the gap (not fully open.) If the clockwise direction