Use and Care Manual

X7502028001 33

SRM-266 MAINTENANCE

1. Remove spark plug lead from

spark plug, and remove engine

cover.

2. Place piston at top dead center.

Remove muffler (A) and heat

shield (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 heat shield, and replace

if damaged.

5. Install heat shield and muffler.

6. Tighten muffler mounting bolts

(or nuts) to 90–110 kgf • cm

(80–95 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.

Carburetor Adjustment

Level 2

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.