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3. Clean cylinder fins (A) to allow cooling air to pass freely. 4. Replace cover and tighten screws. 5. Connect spark plug lead. a exhausT sysTem Spark Arrestor Screen Level 2. Parts Required: Spark arrestor screen, Gasket IMPORTANT Carbon deposits in muffler will cause a drop in engine output and overheating. Spark arrestor screen must be checked periodically. 1. Remove spark plug and engine cover (five screws). 2. Remove spark arrestor cover (A), gasket (B) and spark arrestor screen (C) from muffler. Replace screen if plugged with carbon deposits. 3. Install spark arrestor screen, gaskets, and cover. 4. Install spark plug and engine cover. a B C Exhaust Port Cleaning Level 2 Parts Required: As needed: Muffler gasket 1. Remove spark plug lead from spark plug, and remove engine cover. 2. Place piston at top dead center. Remove muffler (A) and muffler gasket (B ). 3. Use a wood or plastic scraping tool to clean deposits from cylinder exhaust port. IMPORTANT Never use a metal tool to scrape carbon from the exhaust port. Do not scratch the cylinder or piston when cleaning the exhaust port. Do not allow carbon particles to enter the cylinder. 4. Inspect muffler gasket, and replace if damaged. 5. Install muffler gasket 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 specifications. a B 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 1,100 feet above sea level (ASL) (96.0 kPa). To maintain proper engine operation and emission compliance above 1,100 feet ASL the carburetor may need to be adjusted by an authorized ECHO service dealer. IMPORTANT If the engine is adjusted for operation above 1,100 feet ASL, the carburetor must be re-adjusted when operating the engine below 1,100 feet ASL, otherwise severe engine damage may result. Level 2. Parts required: None. NOTE Every unit is run at the factory and the carburetor is set in compliance with emission regulations. Carburetor adjustments, other than idle speed, must be performed by an authorized ECHO dealer. Idle Adjustment Before adjustment make sure that: • Air filter is clean and properly installed. • Spark arrestor screen and muffler are free of carbon. • Blower pipes are installed. 1. Start engine, run at idle for one minute. 2. Complete warm up by running at full throttle for 5 minutes, operating choke twice to clear air from carburetor chambers. 3. Check idle speed and reset if necessary. If a tachometer is available, idle speed screw (A) should be set to the specifications found on "Specifications" Page of this manual. Turn idle screw (A) clockwise to increase idle speed; counter clockwise to decrease idle speed. TroubleshooTIng TROUBLESHOOTING CHART Problem Check Status Cause Remedy -Engine cranks starts hard/ t'doesn start Fuel at carburetor No fuel at carburetor Fuel strainer clogged ne cloggediFuel l Carburetor acelClean or rep acelClean or rep erlSee your Echo dea Fuel at cyilnder inderlNo fuel at cy Carburetor erlSee your Echo dea th fuelier wet wlMuff chixture too riFuel M Open choke Clean/replace air filter Adjust carburetor erlSee your Echo dea Spark at end reiug wlof p No spark Stop switch off problemlcaiectrlE Interlock switch tch to ONiTurn sw erlSee your Echo dea erlSee your Echo dea Spark at plug No spark Spark gap incorrect Covered with carbon lFouled with fue veiug defectlP n.)iAdjust to .65mm (0.026 acelClean or rep acelClean or rep uglReplace p ne runs,iEng es oribut d does not eratelacce properly terlAir fi ter dirtylAir fi Normal wear acelClean or rep lteriFuel f rtyilter diFuel f Contaminants/residues ni lfue Replace Fuel vent vent pluggedlFue n fueliContaminants/residues acelClean or rep uglSpark P rty/worniPlug d Normal wear Clean and adjust or replace Carburetor ustmentjImproper ad onibratiV Adjust ng SystemiCool ing systemlCoo rty/pluggedid nioniExtended operat onsidirty/dusty locat Clean Spark Arrestor Screen Spark arrestor screen uggedlp Normal wear Replace ne doesiEng not crank N/A N/A ne problemiInternal eng erlSee your Echo dea ne runs,iEng t'ower doesnlb work or is weak/uneven peiBlower p oggedlpe ciP Build-up of debris Unclog ooselPipe onibratiV ghteniT pe damagediP Wear/Misuse Replace DangErFuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark by ground- ing spark plug near cylinder plug hole, otherwise serious personal injury may result. sTorage warningDuring operation the muffler or cataly...
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