Cooling System; Exhaust System - Echo PB-410 Operator's Manual

18
COOLING SYSTEMS
Level 2.
IMPORTANT
To maintain proper engine operating temperatures, cooling air must
pass freely through the cylinder fin area. This flow of air carries
combustion heat away from the engine.
Overheating and engine seizure can occur when:
• Air intakes are blocked, preventing cooling air from reaching the
cylinder.
• Dust and grass build up on the outside of the cylinder. This build up
insulates the engine and prevents the heat from leaving.
Removal of cooling passage blockages or cleaning of cooling fins is
considered "Normal Maintenance". Any failure attributed to lack of
maintenance is not warranted.
Cleaning Grill
• Brush accumulated debris from intake grill.
Cleaning Cylinder Fins
• Check periodically.
- Clogged fins result in poor engine cooling.
- Clean the passage of air between the cylinder fins to let cooling air
pass easily.

EXHAUST SYSTEM

Spark Arrestor Screen
Level 2.
Tools required: Cross Head Screwdriver
Parts required: Spark arrestor screen, Gaskets
IMPORTANT
Carbon deposits in muffler will cause a drop in engine output and
overheating. Spark arrestor screen must be checked periodically.
1. Remove muffler cover, spark arrestor cover, gaskets, and spark
arrestor screen from muffler. Replace screen if plugged with
carbon deposits.
NOTE
When cleaning carbon deposit, be careful not to damage the
catalytic body.
2. Install muffler cover, spark arrestor cover, spark arrestor screen,
and gaskets.
3. Tighten all screws securely.
INTAKE
GRILL
Cylinder fins
Spark arrestor screen
Gaskets
Spark arrestor cover