Echo GT_225 - 11-09 Operator's Manual

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Grass TrimmerOperaTOr's manual 19carburetor adjustmentEngine Break-InNew engines must be operated a minimum duration of two tanks of fuelbreak-in before carburetor adjustments can be made. During the break-in period your engine performance will increase and exhaust emissionswill stabilize. Idle speed can be adjusted as required.High Altitude OperationThis 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 emissioncompliance above 1,100 feet ASL the carburetor may need to be ad-justed by an authorized ECHO service dealer.IMPORTANTIf the engine is adjusted for operation above 1,100 feet ASL, thecarburetor must be re-adjusted when operating the engine below1,100 feet ASL, otherwise severe engine damage may result.Exhaust Port CleaningLevel 2.Tools required: Torx T27 L-Wrench, Wood or plastic scraperParts Required: As needed: Heat Shield1. Remove spark plug lead from spark plug, and remove engine cover(2 screws).2. Place piston at top dead center. Remove muffler (A) and heatshield (B).3. Use a wood or plastic scraping tool to clean deposits from cylinderexhaust port.IMPORTANTNever use a metal tool to scrape carbon from the exhaust port.Do not scratch the cylinder or piston when cleaning the exhaustport. 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 80-95 in•lbf(90-110 kgf•cm).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 specifica-tions.AB