3
Every engine has been preset before shipping; Usually it can be operate directly. However,
altitudes will influence the performance of carburetor, to achieve the best performance, fine tuning
on the carburetor is recommended.
2
、功能及调整（
Functions and Adjustments
）
（
1
）、风门，冷启动时使用；
Choke Arm
；（
2
）、油门；
Throttle
；（
3
）、怠速调节
螺丝；
Idle Adjustment Screw
；
（
4
）、低速油针；
Low-speed Needle
；
（
5
）、高速油针；
High-speed
Needle
；
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
1.25
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:
Turn the Idle Adjustment Screw (See No.3) clockwise will increase the idle
speed. At the same time, turn the Low-speed Needle (See No.4) clockwise to reduce the gas.
Normally, the preset from factory is close needle(clockwise) and reopen about 1.5 turns.
High-speed Needle (See No.5) is also about 1.5 turns. We suggest to use tachometer to check
for maximum speed. For the best performance, engine should be accelerating and decelerating
smoothly.
`
⚫
调整两个化油器间连杆的长度
,
保证两个化油器油门能够同时关闭到最小
,
否则将会影响
前后两个发动机的工作状态
.
⚫
Adjust connecting rod for front/rear throttle arm, make sure both arms can reach to the
maximum and minimum position at the same time, an improper adjustment will affect
engine’s working condition seriously.
⚫
请注意：两个点火传感器分别对应前、后两个缸的点火位置，
1
＃传感器对应前面两个
缸，
2
＃传感器对应后面两个缸，请不要接错，否则发动机无法启动。
⚫
Caution: Sensors has to be mounted in correct position. Sensor #1
corresponds with front
cylinders, Sensor #2 corresponds with rear cylinders, incorrect connection will result engine fail to
start.
⚫
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。
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
.
Caution: Do not to run engine at lean oil mixture, it will melt down piston or spark plug
and damage the engine seriously. if spark plug shows a yellow burning residue, it
indicates engine at the best oil mixture.
四、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, with full throttle.
