Echo WP-1000, WP-1000 T1E (Non Emissions Models Without Limiter Caps), Idle Speed Adjustment, Basic Setting, Fine Tuning, (Requires Accurate Tachometer)

(Non Emissions Models Without Limiter Caps)

Tools Required: Screwdriver, Tachometer (ECHO P/N 90051130017).

1.Before adjusting the carburetor, clean or replace the air filter and spark arrester screen.

2.Fill pump housing with clean water.

3.Start engine and run for several minutes to reach operating tem- perature.

Idle Speed Adjustment

Turn "idle" speed adjustment screw (C) CW (clockwise) until engine speed reaches 3000 RPM. Turn screw out, CCW an additional 1/4 turn.

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 LO (B) needle out, CCW 1-1/4 turns. Turn HI (A) needle out

CCW 1-1/4 turns.

Fine Tuning

(Requires Accurate Tachometer)

1.Start engine and allow to warm to operating temperature (minimum 2 - 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 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)

3.HI speed adjustment.

Adjust HI (A) needle with tachometer. Refer to Wide Open Throttle RPM settings listed in "Specifications" on page 27.

4.Check idle speed and reset if necessary. If tachometer is available, idle speed should be set to the specifications found on page 27 "Specifications" of this manual.