3
三、发动机的调整
三、发动机的调整
三、发动机的调整
三、发动机的调整 (ENGINE
(ENGINE
(ENGINE
(ENGINE ADJUSTMENT)
ADJUSTMENT)
ADJUSTMENT)
ADJUSTMENT)
1 、 每台发动机出厂时都经过了初步调整 ， 用户可以直接使用 。 但各地区的海拔高度
将会影响化油器的正常工作，化油器油针可能需要进行微调才能达到最佳的工作位置。
Every engine has been adjusted to average mixture settings which will most likely allow
the engine to start and run in most locations. However, as altitudes and barometric
pressures vary by location, it is very likely that the carburetor mixture settings will need
to be adjusted to obtain optimum performance.
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 圈 ） ； 高速油针 5( 退回 1 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:
ADJUSTMENT:
ADJUSTMENT:
ADJUSTMENT: A general starting point is 1 turns out for the low speed needle (See No.
4), and 1 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
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
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
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
毁
毁
毁 。
。
。
。 大油门燃烧后火花塞的颜色应该是黄色
大油门燃烧后火花塞的颜色应该是黄色
大油门燃烧后火花塞的颜色应该是黄色
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
说明混合气浓度比较合适
说明混合气浓度比较合适
说明混合气浓度比较合适 .
.
.
. 混合气调整过
混合气调整过
混合气调整过
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。
浓时，特别是高速油针的调整，发动机快速收油门容易熄火。
浓时，特别是高速油针的调整，发动机快速收油门容易熄火。
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:
Caution:
Caution:
Caution: Don't
Don't
Don't
Don't be
be
be
be tempted
tempted
tempted
tempted to
to
to
to run
run
run
run an
an
an
an overly
overly
overly
overly rich
rich
rich
rich mixture.
mixture.
mixture.
mixture. A
A
A
A too
too
too
too rich
rich
rich
rich mixture
mixture
mixture
mixture will
will
will
will
only
only
only
only result
result
result
result in
in
in
in poor
poor
poor
poor engine
engine
engine
engine performance
performance
performance
performance (engine
(engine
(engine
(engine easily
easily
easily
easily off
off
off
off in
in
in
in a
a
a
a quick
quick
quick
quick accelerating
accelerating
accelerating
accelerating
and
and
and
and decelerating
decelerating
decelerating
decelerating process),
process),
process),
process), pre-mature
pre-mature
pre-mature
pre-mature carbon
carbon
carbon
carbon buildup,
buildup,
buildup,
buildup, a
a
a
a fouled
fouled
fouled
fouled plug
plug
plug
plug and
and
and
and
excessive
excessive
excessive
excessive exhaust
exhaust
exhaust
exhaust residue.
residue.
residue.
residue. However,
However,
However,
However, a
a
a
a lean
lean
lean
lean mixture
mixture
mixture
mixture will
will
will
will also
also
also
also damage
damage
damage
damage the
the
the
the cylinder
cylinder
cylinder
cylinder
and
and
and
and piston
piston
piston
piston badly.
badly.
badly.
badly. After
After
After
After few
few
few
few times
times
times
times full
full
full
full throttle
throttle
throttle
throttle test
test
test
test and
and
and
and check
check
check
check the
the
the
the spark
spark
spark
spark plug,
plug,
plug,
plug, it
it
it
it
appears
appears
appears
appears to
to
to
to be
be
be
be yellow
yellow
yellow
yellow if
if
if
if mixture
mixture
mixture
mixture had
had
had
had been
been
been
been set
set
set
set properly.
properly.
properly.
properly.
4 、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 .
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