Murray 405001x78B manual Trouble Shooting Chart

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TROUBLE SHOOTING CHART

PROBLEM: The engine will not start.

1.Follow the steps, “How To Start The Engine” in this book.

2.Electric-Start Models: Clean the battery ter- minals. Tighten the cables.

3.Check for a loose wire. Tighten the limit switches. (See the wiring diagram.)

4.Drain the fuel tank. Clean the fuel line. Re- place the fuel filter.

5.Remove the spark plug(s). Move the throttle to the SLOW position. Turn the ignition key to the ON position. Try to start the engine sev- eral times. Install the spark plug.

6.Replace the spark plug.

7.Adjust the carburettor.

2.Adjust the throttle control.

3.Clean the air filter.

4.Replace the fuel filter.

PROBLEM: The engine stops when the blades are engaged.

1.Check the wiring harness for damage or a loose connection. Repair the damaged wire.

2.Grass bag must be installed (applies only to model with rear discharge grass bag).

PROBLEM: On slopes, the engine stops.

1.Mow up and down slopes. Never mow across a slope.

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5.Move the throttle control to the FAST posi- tion.

6.Replace the spring for the blade idler.

7.Clean the extension tube and the connector tube (applies only to model with rear dis- charge grass bag).

PROBLEM: The mower housing does not cut level.

1.Check the air pressure in the tyres.

2.Adjust the level of the mower housing.

3.Check the front axle. If the front axle does not freely pivot, loosen the axle bolt(s).

PROBLEM: The mower blades will not rotate.

PROBLEM: The engine will not turn over.

1.Follow the steps, “How To Start The Engine” in this book.

2.Electric-Start Models: Charge the battery.

3.Replace the fuse.

4.Check the wiring harness for damage or a loose connection. Repair the damaged wire.

5.Electric-Start Models: replace the solenoid.

Recoil-Start Models: replace the module.

PROBLEM: The engine is difficult to start.

1.Adjust the carburettor.

2.Replace the spark plug.

3.Replace the fuel filter.

PROBLEM: The engine does not run smooth or has a loss of power.

1.Check the oil.

2.Clean the air filter.

3.Clean the air screen.

4.Replace the spark plug.

5.The engine is working too hard. Use a lower gear.

6.Adjust the carburettor.

7.Replace the fuel filter.

PROBLEM: The engine does not run smooth at fast speed.

1. Replace the spark plug.

PROBLEM: The engine will not idle.

1.Replace the spark plug.

2.Clean the air filter.

3.Adjust the carburettor.

4.Adjust the throttle control.

5.Drain the fuel tank. Clean the fuel line. Re- place the fuel filter.

PROBLEM: A hot engine causes a de- crease in power.

1.Clean the air screen.

2.Check the oil.

3.Adjust the carburettor.

4.Replace the fuel filter.

PROBLEM: Excessive vibration.

1.Replace the blade.

2.Check for loose engine bolts.

3.Decrease the air pressure in the tyres.

4.Adjust the carburettor.

5.Check for a damaged belt or damaged pulley. Replace the damaged parts.

PROBLEM: The grass does not dis- charge correctly.

1.Stop the engine. Clean the mower housing.

2.Raise the height of cut.

3.Replace or sharpen the blade(s).

4.Move the shift lever to a slower speed.

1.Check the mower drive belt. Make sure the belt is installed correctly.

2.Replace the mower drive belt.

PROBLEM: The unit will not move when the brake is released and the speed control pedal is depressed.

1.Check the motion drive belt. Make sure the belt is installed correctly.

2.Adjust the clutch.

3.Replace the motion drive belt.

4.Release the Automatic Drive Disconnect under the seat.

PROBLEM: The unit moves slower or stops when the speed control pedal is depressed.

1.Adjust the clutch.

2.Replace the motion drive belt.

PROBLEM: When the brake pedal is re- leased, belt noise can be heard.

1.Temporary belt noise does not change the operation of the unit. If belt noise is continu- ous, check the routing of the belt. Make sure the belt is inside all belt guides.

2.If the noise is continuous, adjust the clutch.

PROBLEM: The rear wheels spin over uneven terrain.

1.Check the front axle. If the front axle does not freely pivot, loosen the axle bolt(s).

F-030771L

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Contents Instruction Book 30x49 14x79 17x192 25x3 17x195 17x146 1001054 17x47 030771L 17x47 2x82 14x79 25x320729 17x146 17x192OWNER’S Information ContentsIII. Children IV. ServiceGeneral Operation II. Slope operationSafe Mowing Guide Page After Mowing Steps to FollowBefore Mowing While MowingAssembly Operation Maintenance How To Check And Adjust The Drive How To Adjust The Blade Rotation ControlHow To Adjust The Shift Lever Figure How To Check And Adjust The Clutch FigureHow To Remove The Mower Housing Figure Where To Lubricate FigureHow To Replace The Motion Drive Belt How To Replace The Mower Drive Belt FigureTrouble Shooting Chart 030771L 030771L Repair Parts Key Description Motion Drive Motion Drive Steering Repair Parts Repair Parts Mower Housing Suspension Mower Housing Suspension Mower Housing Complete Mower Housing Assembly Repair Parts Engine Mount Engine Mount Electrical System Key Part Description 030771L