Sears 536.25587 Throttle CONTROl. Adjustment, Carburetor Adjustments, To Adjust, Final Adjustment

SERVICE AND ADJUSTMENTS

THROTTLE CONTROl. ADJUSTMENT

(See Fig. 44)

The throttle control has been preset at factory andadjustment should not be necessary. Check adjustment a_'described" below before loosening clamp screw. If adj_._tment is necessary, proceed as foltows.

oEngine speed is controlled my movement of the throttle control lever..

o Move control "B" to 'FAST" position..

®Swivel"C" should be against side of quarter circle.

TO ADJUST-

eLoosen casing cramp screw "A"o

eMove casing and wire in direction shown until swivel is against side of quarter circle_

•Re-tighten casing clamp screw "A"..

0

CIRCLE

Fig, 44

CARBURETOR ADJUSTMENTS

(See Fig. 45)

Minor carburetor adjustment may be required to compensate for differences in fuel, temperature, altitude or load.

NOTE: The air cleaner must be assembled to carburetor when running engine..

INITIAL ADJUSTMENT

®Gently turn the id]e mixture screw clockwise until it closes. Turning screw in too far may damage it.

eNext turn idle mixture screw 1-1/2 turns counterclockwise. This initial adjustment will permit the engine to be started and warmed up (approximately 5 minutes) prior to final adjustment.

FINAL ADJUSTMENT

eStart engine and place throttle control in IDLE or SLOW position.

eHold throttle lever against idle stop, and adjust idle speed screwto obtain 1200 to i400 RPM

•While still holding throttle lever, turn idle mixture screw

slowly clockwise (lean mixture) until engine j.q_ starts to slow.

•Still holding lever, turn screw slowly counterclockwise (rich mixture) until engine speed "ujg_starts to slow.

•Turn screw to midpoint between rich and lean.

•Adjust idle speed screw to obtain 900 to 1200 RPM

•Release lever.

•If the engine does not accelerate properly, re-adjust carburetor to a slightly richer mixture.

IDLE SPEED

ADJUSTING

SCREW

FIXED MAIN JET

COVER(HIGH

SPEED)

THROTTLE LEVER

IDLE MIXTURE

SCREW

Fig° 45

33