Carburetor Adjustment

简介

Follow this guide to adjust the carburetor on a 2019 Echo Power Pruner model PPT-2620.

This procedure requires running the motor for several minutes. Only run the motor outside or in a large, well-ventilated room. Do not run the motor in an enclosed space.

Wear ear protection while the motor is running.

你所需要的

步骤 1 Install the inductive pickup lead

Carburetor Adjustment, Install the inductive pickup lead: 步骤 1 中的图像 1，2

Carburetor Adjustment, Install the inductive pickup lead: 步骤 1 中的图像 2，2

Feed the inductive pickup lead wire through one of the two holes in the lower-left corner of the tachometer.
Bend the wire around and feed it through the second hole, then pull it tight.

编辑

步骤 2 Attach the tachometer to the spark plug wire

Carburetor Adjustment, Attach the tachometer to the spark plug wire: 步骤 2 中的图像 1，2

Carburetor Adjustment, Attach the tachometer to the spark plug wire: 步骤 2 中的图像 2，2

Clamp the inductive pickup lead alligator clip onto the spark plug wire.
Make sure the inductive pickup lead wire is not touching anything except the tachometer.

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步骤 3 Start the motor

Carburetor Adjustment, Start the motor: 步骤 3 中的图像 1，2

Carburetor Adjustment, Start the motor: 步骤 3 中的图像 2，2

Wear ear protection for the remainder of the procedure.
Start the motor and let it run for two minutes to ensure it reaches operating temperature.

编辑

步骤 4 Open the choke

Carburetor Adjustment, Open the choke: 步骤 4 中的图像 1，3

Carburetor Adjustment, Open the choke: 步骤 4 中的图像 2，3

Carburetor Adjustment, Open the choke: 步骤 4 中的图像 3，3

Make sure the choke is fully in the open position.

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步骤 5

Use a Phillips screwdriver to adjust the carburetor idle screw until the tachometer reads as close to 3100 RPM as possible:
Turn the idle screw clockwise to increase RPM
Turn the idle screw counterclockwise to decrease RPM
Once the idle has been set, shut off the motor and disconnect the tachometer.