McCulloch 250 B Storage, Blade Replacement, Carburetor Adjustment, Idle Speed Adjustment, Engine

Spool

Cover

11.Make sure the lines are not caught be- tween the rim of the spool and the wall of the cover.

12.Reinstall the spool and cover onto the trimmer head. Push until cover snaps into place.

BLADE REPLACEMENT

Refer to the ASSEMBLY section for blade re- placement instructions and illustrations.

CARBURETOR ADJUSTMENT

WARNING: Keep others away when making idle speed adjustments. The trimmer head will be spinning during most of this pro- cedure. Wear your protective equipment and observe all safety precautions. After making adjustments, the trimmer head must not move/spin at idle speed.

The carburetor has been carefully set at the factory. Adjustments may be necessary if you notice any of the following conditions:

S Engine will not idle when the throttle is re- leased.

SThe trimmer head moves/spins at idle speed.

Make adjustments with the unit supported so the cutting attachment is off the ground and will not make contact with any object. Hold the unit by hand while running and making adjust- ments. Keep all parts of your body away from the cutting attachment and muffler.

Idle Speed Adjustment

Allow engine to idle. Adjust speed until engine runs without trimmer head moving or spinning (idle speed too fast) or engine stalling (idle speed too slow).

S Turn idle speed screw clockwise to in- crease engine speed if engine stalls or dies.

STurn idle speed screw counterclockwise to decrease engine speed if trimmer head moves or spins at idle speed.

WARNING: Recheck the idle speed after each adjustment. The trimmer head must not move or spin at idle speed to avoid serious injury to the operator or others.

Idle Speed Screw

Air Filter Cover

If you require further assistance or are unsure about performing this procedure, contact an authorised service dealer.

STORAGE

WARNING: Perform the following steps after each use:

SAllow engine to cool before storing or trans-

porting.

SStore unit and fuel in a well ventilated area where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces, etc.

SEmpty fuel tank before storing or transport- ing the unit.

SStore unit and fuel well out of the reach of children.

SStore unit with all guards in place. Position unit so that any sharp object cannot acci- dentally cause injury.

SEASONAL STORAGE

Prepare unit for storage at end of season or if it will not be used for 30 days or more.

If your unit is to be stored for a period of time:

SClean the entire unit before lengthy storage. S Store in a clean dry area.

S Lightly oil external metal surfaces.

ENGINE

SRemove spark plug and pour 1 teaspoon of

40:1, 2-cycle engine oil (air cooled) through the spark plug opening. Slowly pull the starter rope 8 to 10 times to distribute oil.

SReplace spark plug with new one of recom-

mended type and heat range.

SClean air filter.

S Check entire unit for loose screws, nuts, and bolts. Replace any damaged, broken, or worn parts.

SAt the beginning of the next season, use only fresh fuel having the proper petrol to oil ratio.

OTHER

S Do not store petrol from one season to another.

SReplace your petrol can if it starts to rust.

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