Echo PB-620ST User Manual

Tools required:   19 mm Spark Plug deep socket, feeler gauge 

 

 

 

Parts Required:   REPOWER

TM 

Tune Up Kit 

Use only NGK BPM-8Y spark plug (BPMR-8Y in Canada) other-

wise severe engine damage may occur.

1.  Remove spark plug, and check for fouling, and worn or rounded 

center electrode.

2.  Clean the plug or replace with a new one.  DO NOT sand blast to 

clean. Remaining sand will damage engine.

3.  Adjust spark plug gap by bending outer electrode.

4.  Tighten spark plug to 150-170 kgf • cm (130-150 in.• lbf).

Tools required:    25 - 50 mm (1 - 2 in.) cleaning brush, cross head  

 

 

 

screwdriver

Parts Required:   None, if you are careful.

IMPORTANT  

To maintain proper engine operating temperatures, cooling air must

pass freely through the cylinder fin area. This flow of air carries

combustion heat away from the engine.

Overheating and engine seizure can occur when:

•  Air intakes are blocked, preventing cooling air from reaching the  

cylinder.

•  Dust and grass build up on the outside of the cylinder. This build 

up insulates the engine and prevents the heat from leaving.

Removal of cooling passage blockages or cleaning of cooling fins is 

considered “Normal Maintenance.”  Any failure attributed to lack of 

maintenance is not warranted.

1.  Remove accumulated debris from intake grill between backpack 

frame and blower housing.