Echo HCA-2400 Operator's Manual

Also see for HCA-2400: Operator's manual

HEDGE C LIPPERO PERATOR 'S MANUAL 29(1)(2)(3)(4)SHC-1700, 2100 TYPE 1SHC-2400TYPE 1HCA-2400TYPE 1ACACBCARBURETOR ADJUSTMENTNon Emission Models (without limiter caps)Tools required: Screwdriver, Tachometer (ECHO P/N 99051130017).NOTEIf carburetor has limiter caps follow "Carburetor Adjustment" procedures for Emission models on previous page.Idle Speed AdjustmentTurn "idle" speed adjustment screw (C) CW (clockwise) until bladesbegin to move, then turn screw out CCW (counter clockwise) untilblades stop moving. Turn screw out, CCW an additional 1/4 turn.WARNING DANGERBlades must not move when unit is idling, otherwise seriouspersonal 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 will damagethe carburetor.2. Turn LO needle (B) out, CCW 1-1/4 turns. Turn HI needle (A) outCCW 2-3/4 turns.Fine Tuning(Requires Accurate Tachometer ECHO P/N 99051130017)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 needle (B).a. Lean drop-off - With engine idling, turn LO needle (B) slowlyCW (in) to lean drop-off point. RPM will increase, then abruptlydrop-off. (1) Note this position.b. Rich drop-off - With engine idling, slowly turn LO needle (B)CCW (out) to rich drop-off point. RPM will increase thengradually slow and drop-off. (2) Note this position.c. Final setting - Set needle at mid point between lean rich drop-offpoints. (3)d. Turn 1/8 turn CCW (out) making mixture slightly richer. (4)3. High speed adjustment.Adjust HI needle (A) with tachometer to achieve the specificationsfound on page 14 "Specifications" of this manual.4. Check idle speed and reset if necessary. Using a tachometer, idlespeed should be set to the specification found on page 14 "Specifi-cations" of this manual.WARNING DANGERWhen carburetor adjustment is completed blades should not moveat idle, otherwise serious personal injury may result.