Echo PB-760LNT - Manual (Page 27)

PB-760 LN H/T MAINTENANCE
X7531125002 27
© 03/2013 ECHO Inc.
Exhaust Port Cleaning
Level 2.
1. Remove spark plug lead from spark plug.
2. Remove muffler cover and engine cover.
3. Place piston at top dead center. Remove muffler (A) muffler
gasket (B), and muffler insulator (C).
4. 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.
5. Inspect muffler gasket, and replace if damaged.
6. Install muffler insulator, muffler gasket and muffler.
7. Tighten muffler mounting bolts (or nuts) to 95-130 in•lbf
(110-150 kgf•cm).
8. Install engine cover and attach spark plug lead
9. Start engine, and warm to operating temperature.
10. Stop engine, and re-tighten mounting bolts (or nuts) to
specifications.
11. Install muffler cover.
Carburetor Adjustment
Engine Break-In
New engines must be operated a minimum duration of two tanks of fuel break-in before carburetor
adjustments can be made. During the break-in period your engine performance will increase and exhaust
emissions will stabilize. Idle speed can be adjusted as required.
High Altitude Operation
This engine has been factory adjusted to maintain satisfactory starting, emission, and durability performance
up to 1,100 feet above sea level (ASL) (96.0 kPa). To maintain proper engine operation and emission
compliance above 1,100 feet ASL the carburetor may need to be adjusted by an authorized ECHO service
dealer.
If the engine is adjusted for operation above 1,100 feet ASL, the carburetor must be re-adjusted when
operating the engine below 1,100 feet ASL, otherwise severe engine damage may result.
Level 2.
Parts Required: As needed: Muffler Gasket
Parts Required: None
A
B
C