Carburetor Adjustment

Introduction

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.

What you need

Step 1 Install the inductive pickup lead

Carburetor Adjustment, Install the inductive pickup lead: step 1, image 1 of 2

Carburetor Adjustment, Install the inductive pickup lead: step 1, image 2 of 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.

Edit

Step 2 Attach the tachometer to the spark plug wire

Carburetor Adjustment, Attach the tachometer to the spark plug wire: step 2, image 1 of 2

Carburetor Adjustment, Attach the tachometer to the spark plug wire: step 2, image 2 of 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.

Edit

Step 3 Start the motor

Carburetor Adjustment, Start the motor: step 3, image 1 of 2

Carburetor Adjustment, Start the motor: step 3, image 2 of 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.

Edit

Step 4 Open the choke

Carburetor Adjustment, Open the choke: step 4, image 1 of 3

Carburetor Adjustment, Open the choke: step 4, image 2 of 3

Carburetor Adjustment, Open the choke: step 4, image 3 of 3

Make sure the choke is fully in the open position.

Edit

Step 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.