32
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 Adjustment

High altitude adjustment is not required for proper operation of this
engine.
Level 2.
Tools required: Slotted Screwdriver w/2 mm blade width, Tachometer
(ECHO P/N 99051130017)
Parts required: None.
EXHAUST SYSTEM

Spark Arrestor Screen

Level 2.
Tools required: Cross-head screwdriver, soft metal brush.
Parts Required: Screen P/N 14586240630
1. Remove engine cover. See “Cleaning Cooling System” pages
30 & 31 for step by step instructions.
2. Remove spark arrestor screen cover (A), gasket (B), screen holder
(C) and screen (D) from muffler body.
3. Clean carbon deposits from screen and muffler components.
NOTE
When cleaning carbon deposit, be careful not to damage the
catalylic body.
4. Replace screen if it is cracked, plugged or has holes burned through.
5. Assemble components in reverse order.
NOTE
When installing the engine cover, be certain the tab of the metal
deflector shield is in the slot of the engine cover.
IMPORTANT
The cylinder exhaust port must be inspected and cleaned of excess
carbon every 3 months or 90 hours of operation in order to maintain
this engine within the emissions durability period. ECHO strongly
recommends that you return your unit to your ECHO dealer for this
important maintenance service.
A
B
C
D