20

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 1,000 feet above mean sea level (MSL). To maintain proper engine operation above 1,000 feet MSL the carburetor must be adjusted by an authorized ECHO service dealer.

IMPORTANT

If the engine is adjusted for operation above 1,000 feet MSL, the carburetor must be re-adjusted when operating the engine below 1,000 feet MSL, otherwise severe engine damage can result.

Level2.

Tools required: Screwdriver,Tachometer(ECHOP/N99051130017)

Parts required: None

NOTE

Every unit is run at the factory and the carburetor is set in compliance with emission regulations. This carburetor does not have acceleration and high speed adjustment needles.

1. Check idle speed and reset if necessary. If a tachometer is avail-

 

able, idle speed screw (A) should be set to the specifications found

 

on page 25 "Specifications" of this manual. Turn idle screw (A)

 

clockwise to increase idle speed; counter clockwise to decrease idle

A

speed.

 

WARNING

When carburetor adjustment is completed, the cutting attachment should not turn at idle, otherwise serious personal injury may result.