Echo PB-620H User Manual

Page 19

ower

lower

Perator

anual

IMPORTANT

Carbon deposits in muffler will cause a drop in engine output and

overheating. Spark arrestor screen must be checked periodically.

1. Remove spark plug lead from spark plug, and remove engine or

muffler cover (5 screws).

2. Remove spark arrestor cover (A), gaskets (B) and spark arrestor

screen (C) from muffler.

3. Clean carbon deposits from muffler components.

NOTE

When cleaning carbon deposits, be careful not to damage the cata-

lytic element inside muffler.

4. Replace screen if it is cracked, plugged, or has holes burned

through.

5. Install engine cover or muffler cover and attach spark plug lead.

Exhaust Port Cleaning

Level 2.

Tools required: 4 & 5 mm Hexagon wrench, Cross head screwdriver,

Wood or plastic scraper

Parts Required: As needed: Heat Shield

1. Remove spark plug lead from spark plug, and remove engine or

muffler cover (5 screws).

2. Place piston at top dead center. Remove muffler (A) gasket (B),

and heat shield (C).

3. Use a wood or plastic scraping tool to clean deposits from cylinder

exhaust port.

IMPORTANT

Never use a metal tool to scrape carbon from the exhaust port.

Do not scratch the cylinder or piston when cleaning the exhaust

port. Do not allow carbon particles to enter the cylinder.

4. Inspect heat shield (C) and gasket (B) and replace if damaged.

5. Install heat shield (C), gasket (B), and muffler (A).

6. Tighten muffler mounting bolts (or nuts) to 110-130 in•lbf

(130-150 kgf•cm).

7. Install engine cover.

8. Attach spark plug lead.

9. Start engine, and warm to operating temperature.

10. Stop engine, and re-tighten mounting bolts (or nuts) to specifica-

tions.