Carburetor Adjustment - Echo PB-770 H Operator's Manual

MAINTENANCE
Exhaust Port Cleaning
Level 2.
Parts Required:
1. Remove spark plug lead from
spark plug, and remove engine
cover.
2. Place piston at top dead center.
Remove muffler (A) and muffler
gasket (B).
3. Use a wood or plastic scraping
tool to clean deposits from
cylinder exhaust port.
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 muffler gasket, and
replace if damaged.
5. Install muffler gasket and muffler.
6. Tighten muffler mounting bolts
(or nuts) to 110-150 kgf•cm (95-
130 in•lbf).
7. Install engine cover and attach
spark plug lead.
8. Start engine, and warm to
operating temperature.
9. Stop engine, and re-tighten mounting bolts (or nuts) to specifications.
38
As needed: Muffler Gasket
PB-770 H/T
B
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A
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