3
2、功能及调整
（
Functions and Adjustments
）
（1）、风门，冷启动时使用
(Choke Lever)
（2）、油门
(Throttle Lever)
（3）、怠速调节螺丝
(Idle Speed Adjustment Screw)
（4）、低速油针
(Low Speed Mixture Adjustment Screw)
（5）、高速油针
(
High Speed Mixture Adjustment Screw
)
调整：顺时针转动怠速螺丝3将增大怠速转速，同时要配合低速油针4一起调整，顺
时针转动低速油针减少油量（一般是把油针拧到底再退回1.5圈）；高速油针5(退回1.5-2
圈)最好使用转速表来调整，使发动机达到最高转速，加减速顺畅为最佳。
ADJUSTMENT:
A general starting point is 1.5 turns out for the low speed needle (See
No. 4), and 1.5-2 turns out for the high speed needle (See No. 5).
Adjust the High needle to peak rpm. If ever the engine slows or dies while at full throttle,
the high speed mixture is likely too lean.
Adjust the Low needle until you achieve a smooth idle and a reliable transition to high
throttle. If the engine dies when the throttle is advanced, the mixture is likely too lean. If
the engine stumbles when the throttle is advanced, the mixture is likely too rich.
调整化油器高速油针时请注意：混合气调整过稀将导致发动机严重过热和火花塞烧
毁。大油门燃烧后火花塞的颜色应该是黄色,说明混合气浓度比较合适. 混合气调整过
浓时，特别是高速油针的调整，发动机快速收油门容易熄火。
Caution: Don't be tempted to run an overly rich mixture. A too rich mixture will
only result in poor engine performance (engine easily off in a quick accelerating
and deaccelerating process), pre-mature carbon buildup, a fouled plug and
excessive exhaust residue. However, a lean mixture will also damage the cylinder
and piston badly. After few tmes full throttle test and check the spark plug, it
appears to be yellow if mixture had been set properly.
3、发动机的启动
(Start-up the engine)
（1）关闭风门，加大油门,打开点火电源.
Step 1: Close the Choke and turn on the ignition, advance throttle to full position.
（2）用力转动螺旋桨，（最好用启动棒）直到发动机发出爆炸声.发动机会运转1-2秒而
自动熄火.（首次启动或长时间不用可能需要转动多次螺旋桨）。
