Echo PPT-2100 Operator's Manual

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POWER PRUNEROPERATOR ' S MANUAL 27WARNING DANGERWhen carburetor adjustment is completed, cutting attachmentshould not move at idle, otherwise serious personal injury mayresult.CARBURETOR ADJUSTMENTNon Emissions ModelsNOTEIf carburetor has limiter caps follow "Carburetor Adjustment"procedures for Emission models on previous page.WARNING DANGERCutting attachment must not turn when unit is idling, otherwiseserious personal injury may result.Basic Setting1. Stop engine and turn both LO (B) and HI (A) needles in, CW untilthey stop and are lightly seated.IMPORTANTDO NOT over tighten needles. Forcing them to tighten willdamage the carburetor.2. Turn needles out CCWPPT-2100 LO (B) 1-3/8 turns; HI (A) 1-7/8 turnsPPT-2400 LO (B) 2-1/2 turns; HI (A) 2-1/4 turnsFine Tuning(Requires Accurate Tachometer)CBAF(1)(2)(3)(4)CBAPPT-2100PPT-2400Idle Speed AdjustmentTurn "idle" speed adjustment screw (C) CW (clockwise) until saw chain begins to turn, then turn screw out CCW (counterclockwise) until saw chain stops turning. Turn screw out, CCW an additional 1/4 turn.1. Start engine and allow to warm to operating temperature (minimum2 - 3 minutes) 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 slowlyCW (in) to lean drop-off point. RPM will increase, thenabruptly drop-off. Note this position. (1)b. Rich drop-off - With engine idling, slowly turn LO (B) needleCCW (out) to rich drop-off point. RPM will increase thengradually 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 slightlyricher. (4)3. HI speed adjustment.Adjust HI (A) needle with tachometer. Refer to Wide OpenThrottle RPM settings listed in "Specifications" on page 13.4. Check idle speed and reset if necessary. If tachometer is available,idle speed should be set to the specifications found on page 13"Specifications" of this manual.