McCulloch MC125 Service and Adjustments, Replacing the Line, Replacing the Cutting Head

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SERVICE AND ADJUSTMENTS

REPLACING THE LINE

For unit to operate properly, the cutting line should be replaced when line becomes worn to less than 3 inches (7.5 cm) in length from the edge of the line exit tunnels on each side of the cutting head.

1.Remove and discard worn line before installing new line.

2.Use only 0.115 inch (3 mm) diameter cut length line.

3.Insert one end of the line through the positioning tunnel.

4.Continue to feed line through tunnel until line is centered (leaving equal amounts on each side). See illustration below.

Positioning tunnel

5.Insert ends of line one at a time through the line exit tunnels.

6.Pull the line and make sure the line is ex- tended fully through the tunnels.

Line exit

Line exit

tunnel

tunnel

7.Correctly installed line will be the same length on both ends.

REPLACING THE CUTTING HEAD

1.Align hole in the dust cup with the hole in the side of the gearbox by rotating the dust cup.

2.Insert a small screwdriver into aligned holes. This will keep the shaft from turning while removing and installing trimmer head.

Screwdriver

3.While holding the screwdriver in position, remove trimmer head by turning clockwise.

4.Thread replacement trimmer head onto the shaft by turning counterclockwise. Tighten until secure.

5.Remove the screwdriver.

CARBURETOR IDLE SPEED

ADJUSTMENT

WARNING: Keep others away when making idle speed adjustments. The trimmer head, blade or any optional attachment will be spinning during most of this procedure. Wear your protective equipment and observe all safe- ty precautions. After making adjustments, the trimmer head, blade or any optional attachment 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 released.

S The trimmer head, blade or optional attachment moves/spins at idle.

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 ad- justments. Keep all parts of your body away from the cutting attachment and muffler.

To adjust idle speed:

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

S Turn idle speed screw clockwise to increase engine speed if engine stalls or dies.

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

WARNING: Recheck the idle speed after each adjustment. The trimmer head, blade or optional attachment 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 authorized service dealer or call 1--800--554--6723.

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Contents English Español Français Manual de Instrucciones Manuel d’InstructionsHazard zone for thrown objects Identification of Safety SymbolsIdentification of Safety Symbols Safety Rules Operator SafetyOptional Attachments Additional Safety Rules Unit / Maintenance SafetyFuel Safety Line Trimmer SafetyHandlebar Edger SafetyBLOWER/VACUUM Safety Brushcutter SafetyCultivator Safety Hedge Trimmer SafetyPole Pruner Safety Keep the rotor clear of debris Snow Thrower SafetyHigh speed causing injury Know how to stop quicklyAttaching the Shield AssemblyInstalling Trimmer ATTACH- Ment Adjusting the HandleOperation Starting a Warm Engine HOW to Stop Your UnitHOW to Start Your Unit Starting a Cold EngineRemove the shaft cap from the attach- ment if present Installing Optional ATTACH- MentsRemoving Trimmer ATTACH- Ment or Other Optional Attachments Operating PositionInches 8 cm above ground Cutting MethodsTip of the line Does the cutting Work areaMaintenance Replacing the Cutting Head Service and AdjustmentsCarburetor Idle Speed Adjustment Replacing the LineOther Seasonal StorageFuel System EngineTroubleshooting Table Cause Remedy Ligations The U.S. Environmental Limited WarrantyHarris Corners Canada, contactIntermediate 125 hours Extended 300 hours

115376827, 966625001, MC125 specifications

The McCulloch 966625001, also known as the MC125, is a powerful and efficient chainsaw designed to meet the demands of both professional and domestic users. This model stands out due to its advanced features, robust technologies, and user-friendly characteristics, making it a popular choice among tree care specialists, landscapers, and homeowners alike.

One of the key features of the MC125 is its powerful engine. It is equipped with a 25cc two-stroke engine, delivering impressive performance for cutting through various types of wood efficiently. The engine is designed with McCulloch's innovative OxyPower technology, which enhances its fuel efficiency and reduces exhaust emissions. This technology not only supports environmentally-friendly practices but also ensures longer run times between refueling, which adds convenience during extended use.

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