Assessments - 1, GPA: 3
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Basic Setting 1. Stop engine and turn both LO (B) and HI (A) needles in, CW until they stop and are lightly seated. IMPORTANT DO NOT over tighten needles. Forcing them to tighten will damage the carburetor. 2. Turn needles out CCW: HC-1500 LO (B) 1-1/4 turns; HI (A) 1-1/2 turns Others (LO) (B) 1-1/4 turns; HI (A) 1-3/8 turns Fine Tuning (Requires Accurate Tachometer) 1. Start engine and allow to warm to operating temperature (minimum 2 - 3 minutes) while varying engine speed from idle to full throttle. 2. Always begin fine tuning with LO (B) needle. a. Lean drop-off - With engine idling, turn LO (B) needle slowly CW (in) to lean drop-off point. RPM will increase, then abruptly drop-off. Note this position. (1) b. Rich drop-off - With engine idling, slowly turn LO (B) needle CCW (out) to rich drop-off point. RPM will increase then gradually slow and drop-off. Note this position. (2) c. Final setting - Set needle at mid point between lean rich drop- off points. (3) d. Turn needle 1/8 turn CCW (out) making mixture slightly richer. (4) C BA HEDGE CLIPPER OPERATOR'S MANUAL 25 3. HI speed adjustment. Adjust HI (A) needle with tachometer. Refer to Wide Open Throttle RPM settings listed in "Specifications" on page 12. 4. Check idle speed and reset if necessary. If tachometer is available, idle speed should be set to the specifications found on page 12 "Specifications" of this manual. WARNING DANGER When carburetor adjustment is completed, blades should not move at idle, otherwise serious personal injury may result. LUBRICATION Blades Level 1. Tools required: Clean rag, 25 or 50 mm (1 or 2 in.) medium bristle paint brush Parts Required: 20W Engine Oil (lubrication), 50-50 mixture of kerosene and 20W oil (cleaning). WARNING DANGER Hedge Clipper Blades are very sharp. Wear gloves to protect hands. 1. Disconnect spark plug wire from spark plug. 2. Brush loose debris from blade and coat both sides of blade with the 50-50 cleaning mixture. 3. Allow cleaning mixture to soften the remaining gummy residue then wipe it from the blade. 4. Apply clean oil to the entire length of the blade. Be certain the blade bolts are lubricated. 5. Wipe excess oil from the blade before putting the unit back in service. 26 26 Gear Box Assembly Level 2. Tools required: 3 mm Hexagon wrench, Grease Gun Parts Required: Gear Box Gasket, HC-2400 P/N 61041401260, HC-1500 2E P/N 61041406560, Others P/N 61041405360, ECHO® LUBETM 8 oz. (P/N 91014) or Lithium Based Grease. HC-1500 Type 1, Type 1E 1. Clean debris and dirt from gear box area. Remove the six (6) socket head cap screws retaining the gear box cover plate. 2. Remove cover plate and discard gasket. 3. Add grease as required, DO NOT over fill. Leave room for the grease to expand during operation. HC-1600, 2000 (All) Level 1. Tools required: 13mm Open End, Grease Gun Parts required: ECHO® LUBETM 8 oz. (P/N 91014) or Lithium Based Grease. 1. Clean dirt from filler plug area and remove plug. 2. Carefully pump grease into hole. DO NOT force grease. Too much pressure will force grease past seals and cause damage. 3. Wipe excess grease from gear box and replace the filler plug. HEDGE CLIPPER OPERATOR'S MANUAL 27 HC-1500, Type 2E, HC-2400, 2410 (All) Level 1. Tools required: Grease Gun, Clean rag Parts required: ECHO® LUBETM 8 oz. (P/N 91014) or Lithium Based Grease. 1. Clean dirt from the grease fitting. 2. Carefully pump grease into fitting. DO NOT force grease. Too much pressure will force grease past seals and cause damage. BLADE STIFFENER REMOVE/INSTALL Level 2. Tools required: (2) 13mm Open End Parts Required: None WARNING DANGER Hedge Clipper blades are very sharp. Wear gloves to protect hands. 1. Disconnect spark plug wire from spark plug. 2. Hold blade bolt head under blade assembly. Remove blade locknut from top side turning counter clockwise. 3. Repeat step 2 for remaining blade nuts. NOTE Locking ability of Hedge Clipper blade nuts will diminish each time they are removed. Replace blade nuts if threading resistance is not felt when installing locknuts. 28 28 SHARPENING BLADES Level 3. Tools required: Flat file, Screwdriver Parts required: None WARNING DANGER Hedge Clipper Blades are very sharp. Wear gloves to protect hands. 1. Disconnect spark plug wire from spark plug. 2. (Models HC-1500, HC-1600) Remove blade stiffener (See "Blade Stiffener Remove/Install" on page 26). 3. File each edge carefully. Follow the original shape of the blade. IMPORTANT If a power grinder is used DO NOT allow blade to over heat. 4. (Models HC-1500, HC-1600) Assemble blade stiffener using new blade nuts if required. Tighten bolts and nuts then loosen bolt 1/2 turn to allow free blade movement. 5. Lubricate blades. See "Blade Lubrication Instructions," on page 24. IMPORTANT Blades should only be removed and reinstalled by an Authorized ECHO Servicing Dealer, otherwise premature wear or internal damage may occur. HEDGE CLIPPER OPERATOR'S MANUAL 29 TROUBLESHOOTING Problem Cause Remedy Engine --starts hard Engine -...
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