beautypg.com

Cleaning cylinder fins, Exhaust system, Spark arrestor screen – Echo PB-250LN User Manual

Page 22: Exhaust port cleaning, Maintenance pb-250ln

background image

22

X7501183303

© 3/2013 ECHO Inc.

MAINTENANCE

PB-250LN

Cleaning Cylinder Fins

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

engine cover.

2. Clean cylinder fins to allow cooling air to pass freely.
3. Reassemble parts in reverse order.

Exhaust System

Spark Arrestor Screen

Level 2.

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 cover.

2. Remove spark arrestor cover (A), deflector (B), plate (C),

gasket (D), and spark arrestor screen (E) from muffler.

Replace screen if plugged with carbon deposits.

Note: When cleaning carbon deposits, be careful not to damage

the catalytic element inside muffler.

3. Clean carbon deposits from muffler components.
4. Install spark arrestor screen, gasket, plate, deflector, and

cover.

5. Loosely reassemble engine cover.
6. Tighten all screws securely.
7. Attach spark plug lead.

Exhaust Port Cleaning

Level 2.

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.

Parts Required:

Spark Arrestor Screen, Gasket

Parts Required:

As needed: Heat Shield

A

B

C

D

E

A

B