Ryobi EJ101 - Manual (Page 16)

Page 16
MAINTENANCE
CARBURETOR ADJUSTMENT
See Figure 10.
The carburetor on your saw has been factory set. After
extended use of your saw adjustments may be required.
The high speed needle has been permanently set from the
factory at 1-1/4 turns counterclockwise from the closed
position. No additional adjustments should be required or
made to this needle.
However, it is possible to make two basic adjustments; The
idle adjusting screw and low speed needle.
The idle adjusting screw may be turned clockwise for a
higher idle speed setting or counterclockwise for a lower idle
speed setting. The idle rotating speed should be just under
the speed required to make the blade reciprocate.
The low speed needle should be initially set at 1-1/4 turns
counterclockwise from the closed position. Once the engine
warms up, check to see how rich the fuel is burning. If you
notice excessive smoke from the exhaust system it is burning
too rich. Turn the low speed needle 1/8 turn clockwise (in
toward the closed position). If you turn it too much the engine
will not accelerate or it will hesitate when you attempt to
accelerate. Continue to adjust the low speed needle 1/16 of
a turn at a time until the engine stabilizes and accelerates
properly.
NOTE: Careless adjustments can seriously damage your
saw. Carburetor adjustments should be made by a authorized
service technician at an authorized service center.
REPLACING THE SPARK PLUG
See Figure 11.
Use a Resistor type NGK BMR6A spark plug (or equivalent).
The correct air gap is 0.7 mm. Remove the plug after every
50 hours of operation and check its condition.
1. Stop the engine and allow it to cool. Grasp the plug wire
firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug from
the cylinder head using the spark plug wrench provided.
3. Replace cracked, fouled, or dirty spark. Set the air gap at
0.7 mm using a feeler gage. See Figure 11.
CAUTION:
Do not sand blast, scrape, or clean electrodes. Grit
in the engine could damage the cylinder.
4. Install a correctly gapped spark plug in the cylinder head.
Tighten securely using the spark plug wrench provided.
If using a torque wrench torque to:
110-120 in.•lb. (12.3-13.5 N•m).
Do not over tighten.
L
H H
HIGH SPEED
NEEDLE
LOW SPEED
NEEDLE
IDLE
ADJUSTING
SCREW
Fig. 10
Fig. 11
0.7 mm