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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 may be required for proper operation of this engine. IMPORTANT For engine operation above 2,000 feet, turn the high-speed needle lean (CW) until the engine runs between 7,000 and 8,000 RPM. Then turn the low-speed needle lean (CW) until the engine does not hesitate on acceleration. For engine operation below 2,000 feet, turn the high-speed needle rich (CCW) until the engine runs between 7,000 and 8,000 RPM. Then turn the low-speed needle rich (CCW) until the engine does not hesitate on acceleration. DO NOT REMOVE LIMITER CAPS! Level 2. Tools required: Screwdriver, tachometer (Echo P/N 99051130017) Parts required: None. NOTE Do not adjust carburetor unless necessary. If you have difficultly, see your ECHO dealer. Adjustment Screws Idle Speed (A) Control throttle opening at idle. Low (LO) Speed (B) Controls amount of fuel at low speed and supplementary fuel for smooth progression from idle to high speed. High (HI) Speed (C) Controls amount of fuel at full throttle Before Adjustment Check that: • Air filter is clean and properly installed. • Spark arrestor screen and muffler are free of carbon. • Blower pipes are installed. A C B 20 Initial Adjustment 1. With engine off, turn HI speed screw (C) counterclockwise to stop. 2. Turn LO speed screw (B) midway between stops. 3. Turn idle screw (A) until tip of screw just touches throttle plate; then turn three (3) turns clockwise. Final Adjustment IMPORTANT Limiter caps prevent exceeding emission limits and over rich adjustment, but not over lean adjustment, which can cause engine failure: Do not exceed recommended HI speed engine R.P.M. during operation, or for long periods during adjustment. 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. Run at idle and accelerate to check for smooth transition from idle to high speed; if engine hesitates, turn LO speed screw (B) counterclockwise 1/8th of a turn at a time until acceleration is smooth. 4. Use a tachometer to adjust idle speed to specifications found on page 23. A C B POWER BLOWER OPERATOR'S MANUAL 21 TROUBLESHOOTING TROUBLESHOOTING CHART Problem Check Status Cause Remedy -ne cranksiEng starts hard/ t'doesn start at carburetorlFue at carburetorlNo fue oggedlner cistralFue oggedlne cillFue Carburetor acelean or replC acelean or replC erlSee your Echo dea nderilat cylFue nderilat cylNo fue Carburetor erlSee your Echo dea lth fueier wet wlMuff chixture too riMlFue Open choke terlir fiace alean/replC ust carburetorjAd erlSee your Echo dea Spark at end reiug wlof p No spark tch offiStop sw emlproblcaiectrlE tchiock swlInter tch to ONiTurn sw erlSee your Echo dea erlSee your Echo dea uglSpark at p No spark ncorrectiSpark gap th carboniCovered w lth fueied wlFou veiug defectlP n.)i.65mm (0.026ust tojAd acelean or replC acelean or replC uglace plRep ne runs,iEng es oribut d does not eratelacce ylproper terlir fiA rtyiter dlir fiA wearlNorma acelean or replC terliflFue rtyiter dliflFue duesinants/resiContam ni lfue acelRep ventlFue uggedlvent plFue n fueliduesinants/resiContam acelean or replC uglSpark P rty/worniug dlP wearlNorma acelust or repjean and adlC Carburetor ustmentjImproper ad onibratiV ustjAd ng SystemilCoo ng systemilCoo uggedlrty/pid nioniExtended operat onsiocatlrty/dustyid eanlC Spark Arrestor Screen Spark arrestor screen uggedlp wearlNorma acelRep ne doesiEng not crank N/A N/A emlne probienglInterna erlSee your Echo dea ne runs,iEng t'ower doesnlb siwork or weak/uneven peiower plB oggedlpe ciP sid-up of debrliBu oglUnc ooselpeiP onibratiV ghteniT pe damagediP suseiWear/M acelRep WARNING DANGER Fuel 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. 22 2. Place the stop switch in the "STOP" position. 3. Remove accumulation of grease, oil, dirt and debris from exterior of unit. 4. Perform all periodic lubrication and services that are required. 5. Tighten all screws and nuts. 6. Drain the fuel tank completely and pull the recoil starter handle several times to remove fuel from the carburetor. STORAGE WARNING DANGER During operation the muffler or catalytic muffler and surrounding cover become hot. Always keep exhaust area clear of flammable debris during transportation or when storing, otherwise serious property damage or personal injury may result. Long Term Storage (Over 30 Days) Do not store your unit for a prolonged period of time (30 days or longer) without performing protective storage mainte- nance which includes the following: 1. Store unit in a dry, dust free place, out of the reach of children. WARNING DANGER Do not store in enclosure where fuel f...