Assessments - 3, GPA: 4.7
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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. Tools required: Cross Head Screwdriver Parts Required: Spark arrestor screen P/N 14586206720, Gasket P/N V104000220 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. Cylinder Exhaust Port Level 3. AB C 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. 22 22 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: Screwdriver, tachometer (Echo P/N 99051130017) Parts required: None. NOTE Do not adjust carburetor unless necessary. If you have difficulty, see your ECHO dealer. Adjustment Screws Idle Speed (A) Controls 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 POWER BLOWER OPERATOR'S MANUAL POWER BLOWER OPERATOR'S MANUAL 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 9. A C B 24 24 G 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.)iust to .65mm (0.026jAd 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 near an open spark plug opening, otherwise serious personal injury may result. POWER BLOWER OPERATOR'S MANUAL 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...
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