Ryobi RY30971 用户手册

5

1.  Clean or replace spark plug. Reset spark plug 

gap. Refer to 

Spark Plug Replacement earlier 

in this manual.

.  Push primer bulb until bulb is full of fuel. If bulb 

does  not  fill,  primary  fuel  delivery  system  is 
blocked.  Contact  a  service  dealer.  If  primer 
bulb  fills,  engine  may  be  flooded,  proceed  to 
next item.

3.  Set the start lever to the START position. Squeeze 

the trigger and pull the rope repeatedly until the 
engine starts and runs. 

 

NOTE: Depending on the severity of the flooding, 
this may require numerous pulls of the rope.

1.  Use fresh fuel and the correct -cycle lubricant 

mix. (50:1).

. Clean  air  filter  screen.  Refer  to 

Filter Screen earlier in this manual.

3. Contact a servicing dealer.

4.  Clean or replace spark plug. Reset spark plug 

gap. Refer to 

Spark Plug Replacement earlier 

in this manual.

1.  Turn idle speed screw clockwise to increase idle 

speed. See Figure 32.

1.  Lubricate string with silicone spray.
.  Install more string. Refer to the applicable string 

replacement section in this manual.

3.  Pull strings while alternately pressing down on 

and releasing spool retainer.

4.  Remove string from spool and rewind. Refer to 

the applicable string replacement section in this 
manual.

5.  Advance string at full throttle.

Engine will not start

Engine  does  not  reach  full 
speed and emits excessive 
smoke

Engine starts, runs, and ac-
celerates but will not idle

String will not advance

1.  No spark.

.  No fuel.

3.  Engine is flooded.

1.  Incorrect lubricant/fuel mixture.

.  Air filter screen is dirty.

3.  Spark arrestor screen is dirty.
4.  Spark plug fouled.

1.  Idle  speed  screw  on  carburetor 

needs adjustment.

1.  String is welded to itself.
.  Not enough string on spool.

3.  String is worn too short.

4.  String is tangled on spool.

5.  Engine speed is too slow.

Fig. 3