Craftsman 917.271653 Engine, To Adjust Throttle Control Cable, Holes a Throttle, Final SEnING

ENGINE

Maintenance, repair, or replacement of the emission control devices and systems, which are being done at the customers expense, may be performed by any non-mad engine repair establishment or individual. Warranty repairs must be performed by an authorized engine manufacturer's service outlet.

TO ADJUST THROTTLE CONTROL CABLE

The throttle control has been preset at the factory and adjustment should not be necessary. Check adjustment as described below before loosening cable. If adjustment is necessary, proceed as follows:

1.With engine not running, move throttle control lever from slow to choke position. Slowly move lever from choke to fast position.

2.Check that holes "A" in govemor control lever and hole in governor plate line-up. If holes "A" are not aligned, loosen clamp screw and move throttle cable until holes are aligned. Tighten clamp screw securely.

GovernorGovernor

LeverPlate

Holes "A" Throttle

ScrewCable

TO ADJUST CARBURETOR

NOTE: The carburetor on this engine is low emission. It is equipped with an idle fuel

adjusting needle with a limiter cap, which allows some adjustment within the limits

allowed by the cap. Do not attempt to remove the lim_r cap. The limiter cap cannot be

removed without breaking the adjusting needle.

The carburetor has been preset at the factory and adjustment should not be necessary. However, minor adjustment may be required to compensate for differences in fuel, temperature, altitude or load. If the carburetor does need adjustment, proceed as follows:

In general, turning idle mixture valve in (clockwise) decreases the supply of fuel to the engine giving a leaner fueVair mixture. Turning the idle mixture valve out (counter-

cloc_vise.).increases the supply of fuel to the engine gswng a richer fueVair mixture.

IMPORTANT: Damage to the needle valve and the seat in carburetormay resultif screw isturned intoo tight.

PRELIMINARY SE'I-I'ING-

1.Air cleaner assembly must be assembled to the carburetor when making carburetor adjustments.

2.Be sure the throttle control cable is adjusted properly (see above).

FINAL SE'n'ING-

1.Start engine and allow to warm for five minutes. Make final adjustments with engine running and shift/motion control lever in neutral (N) position.

2.Move throttle control lever to slow position. With finger, rotate and hold throttle lever against idle speed screw.

Turn idle speed screw to attain 1750 RPM.

3.While still holding throttle lever against idle speed screw, turn idle mixture valve full travel clockwise then counterclock-

wise until engine runs rough. Turn valve to a point midway between those two positions. Release throttle lever.

ACCELERATION TEST -

4.Move throttle controllever from slow to fast position. If engine hesitates or dies, turn idle mixture valve out (counterclock- wise) 1/8 turn. Repeat test and continue to adjust, if necessary, until engine

accelerates smoothly.

High speed stop is factory adjusted. Do not adjust or damage may result.

IMPORTANT: Never tamper with the engine governor, which is factory set for proper engine speed. Overspeeding the engine above the factory high speed setting can be dangerous. If you think the engine-governed high speed needs adjusting, contact a Sears or other qualified service center, which has proper equipment and experience to make any necessary adjustments.

Idle Speed [-]-_ _ Throttle

Screw__

Idle Mixture Valve

With Limiter

26