Ryobi EJ101 specifications Carburetor Adjustment, Replacing the Spark Plug

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.

LOW SPEED

HIGH SPEEDNEEDLE

NEEDLE

H

L

IDLE

ADJUSTING

SCREW

Fig. 10

0.7 mm

Fig. 11

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