Craftsman 247377001 Owner’s Manual

Operator’s Manual

21” LAWN MOWER

Model No. 247.377001

CAUTION: Before using this product, read this manual and follow all safety rules and operating instructions.

Sears Brands Management Corporation, Hoffman Estates, IL 60179, U.S.A.

Visit our website: www.craftsman.com

• SAFETY

• UNPACKING P. 8

• ASSEMBLY

• OPERATION

• MAINTENANCE

• ESPAÑOL

Form No. 769-12129

(January 24, 2017)

TABLE OF CONTENTS

Warranty Statement ..............................Page 2

Safety Instructions ............................Pages 3-6

Slope Guide .....................................Page 7

Assembly ....................................Pages 8 -10

Adjustments ....................................Page 10

Operation ..................................Pa ge s 11-12

Service and Maintenance ....................Pages 13-14

Off-Season Storage ..............................Page 15

Troubleshooting .............................Page 16 -17

Español .........................................Page 21

Service Number ............................. Back Cover

WARRANTY STATEMENT

CRAFTSMAN LIMITED WARRANTY

FOR TWO YEARS from the date of sale, this product is warranted against any defects in material or workmanship. WITH PROOF OF SALE, a defective product will receive free repair. If the product cannot be repaired it will be replaced free of charge. For warranty coverage details to obtain free repair or replacement, visit the web page: www.craftsman.com/warranty This warranty covers ONLY defects in material and workmanship. Warranty coverage does NOT include:

• Expendable items that can wear out from normal use within the warranty period, including but not limited to blades, spark plugs, air cleaners, belts, and oil filters.

• Product damage resulting from user attempts at product modification or repair or caused by product accessories.

• Repairs necessary because of accident or failure to operate or maintain the product according to all supplied instructions.

• Preventive maintenance, or repairs necessary due to improper fuel mixture, contaminated or stale fuel.

This warranty is void if this product is ever used while providing commercial services or if rented to another person. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Sears Brands Management Corporation, Hoffman Estates, IL 60179

MODEL NUMBERPRODUCT SPECIFICATIONS

Engine Oil: SAE 10W-30 Fuel: Unleaded Gasoline

Model Number ________________________________ Serial Number _________________________________

Engine: Briggs & Stratton

Date of Purchase _______________________________

Record the model number, serial number,

and date of purchase above.

SAFETY INSTRUCTIONS

WARNING

This symbol points out important safety instructions which, if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all instructions in this manual before attempting to operate this machine. Failure to comply with these instructions may result in personal injury. When you see this symbol, HEED ITS WARNING!

WARNING

CALIFORNIA PROPOSITION 65

Engine Exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to State of California to cause cancer and birth defects or other reproductive harm.

GENERAL OPERATION

• Read this operator’s manual carefully in its entirety before attempting to assemble this machine. Read, understand, and follow all instructions on the machine and in the manuals before operation. Keep this manual in a safe place for future and regular reference and for ordering replacement parts

• Be completely familiar with the controls and the proper use of this machine before operating it.

• This machine is a precision piece of power equipment, not a plaything. Therefore, exercise extreme caution at all times. This machine has been designed to perform one job: to mow grass. Do not use it for any other purpose.

• Never allow children under 14 years of age to operate this machine. Children 14 and over should read and understand the instructions and safe operation practices in this manual and on the machine and should be trained and supervised by an adult.

• Only responsible individuals who are familiar with these rules of safe operation should be allowed to use this machine.

• Thoroughly inspect the area where the equipment is to be used. Remove all stones, sticks, wire, bones, toys and other foreign objects, which could be tripped over or picked up and thrown by the blade. Thrown objects can cause serious personal injury.

• Plan your mowing pattern to avoid discharge of material toward roads, sidewalks, bystanders and the like. Also, avoid discharging material against a wall or obstruction, which may cause discharged material to ricochet back toward the operator.

• To help avoid blade contact or a thrown objec t injury, stay in operator zone behind handles and keep children, bystanders, helpers and pets at least 75 feet from mower while it is in operation. Stop machine if anyone enters area.

• Always wear safety glasses or safety goggles during operation and while performing an adjustment or repair to protect your eyes. Thrown objects which ricochet can cause serious injur y to the eyes.

DANGER

This machine was built to be operated according to the safe operation practices in this manual. As with any type of power equipment, carelessness or error on the part of the operator can result in serious injury. This machine is capable of amputating fingers, hands, toes and feet and throwing debris. Failure to observe the following safety instructions could result in serious injury or death.

WARNING

Your Responsibility—Restrict the use of this power machine to

persons who read, understand and follow the warnings and instructions in this manual and on the machine.

SAVE THESE INSTRUCTIONS!

• Wear sturdy, rough-soled work shoes and close-fitting slacks and shirts. Shirts and pants that cover the arms and legs and steel-toed shoes are recommended. Never operate this machine in bare feet, sandals, slippery or light-weight (e.g. canvas) shoes.

• Do not put hands or feet near rotating parts or under the cutting deck. Contact with blade can amputate fingers, hands, toes and feet.

• A missing or damaged discharge cover can cause blade contact or thrown object injuries.

• Many injuries occur as a result of the mower being pulled over the foot during a fall caused by slipping or tripping. Do not hold on to the mower if you are falling: release the handle immediately.

• Never pull the mower back toward you while you are walking. If you must back the mower away from a wall or obstruction first look down and behind to avoid tripping and then follow these steps:

a. Step back from mower to fully extend your arms forward. b. Be sure you are well balanced with sure footing. c. Pull the mower back slowly, no more than half way toward you. d. Repeat these steps as needed.

• Do not operate the mower while under the influence of alcohol or drugs.

• Do not engage the self-propelled mechanism on machines so equipped while starting engine.

• The blade control handle is a safety device. Never attempt to bypass its operation. Doing so makes the safety device inoperative and may result in personal injury through contact with the rotating blade. The blade control handle must operate easily in both directions and automatically return to the disengaged position when released.

• Never operate the mower in wet grass. Always be sure of your footing. A slip and fall can cause serious personal injury. If you feel you are losing your footing, release the blade control handle immediately and the blade will stop rotating within three seconds.

• Mow only in daylight or good artificial light. Walk, never run.

• Stop the blade when crossing gravel drives, walks or roads.

SAFETY INSTRUCTIONS

• If the equipment should start to vibrate abnormally, stop the engine and check immediately for the cause. Vibration is generally a warning of trouble.

• Shut the engine off and wait until the blade comes to a complete stop before removing the grass Bagger or unclogging the chute. The cutting blade continues to rotate for a few seconds after the blade control is released. Never place any part of the body in the blade area until you are sure the blade has stopped rotating.

• Never operate mower without proper trail shield, discharge cover, grass Bagger, blade control handle or other safety protective devices in place and working. Never operate mower with damaged safety devices. Failure to do so can result in personal injury.

• Muffler and engine become hot and can cause a burn. Do not touch.

• Never attempt to make a wheel or cutting height adjustment while the engine is running.

• Only use parts and accessories made for this machine by the manufacturer as listed in the Parts pages of this Operator’s Manual. Failure to do so can result in personal injury.

• When starting engine, pull cord slowly until resistance is felt, then pull rapidly. Rapid retraction of starter cord (kickback) will pull hand and arm toward engine faster than you can let go. Broken bones, fractures, bruises or sprains could result.

• If situations occur which are not covered in this manual, use care and good judgement.

SLOPE OPERATION

Slopes are a major factor related to slip and fall accidents, which can result in severe injury. Operation on slopes requires extra caution. The machine is heavy and can speed up when going downhill. Be prepared to maintain control of the machine. If you feel uneasy on a slope, do not mow it. For your safety, use the slope gauge included as part of this manual to measure slopes before operating this machine on a sloped or hilly area. If the slope is greater than 15 degrees, do not mow it.

Do:

• Mow across the face of slopes; never up and down to avoid loss of control.

• Exercise ex treme caution when changing direction on slopes; turn uphill not down.

• Watch for holes, ruts, rocks, hidden objects, or bumps which can cause you to slip or trip. Tall grass can hide obstacles.

• Always be sure of your footing. A slip and fall can cause serious personal injury. If you feel you are losing your balance, release the blade control handle immediately and the blade will stop rotating within three (3) seconds.

Do Not:

• Do not mow near drop-offs, ditches or embankments, because you could lose your footing or balance.

• Do not mow slopes greater than 15 degrees as shown on the slope guide.

• Do not mow on wet grass. Unstable footing could cause slipping.

CHILDREN

Tragic accidents can occur if the operator is not alert to the presence of children. Children are often attracted to the mower and the mowing activity. They do not understand the dangers. Never assume that children will remain where you last saw them.

• Keep children out of the mowing area and under watchful care of a responsible adult other than the operator.

• Be alert and turn mower off if a child enters the area.

• Before and while moving backwards, look behind and down for small children.

• Use extreme care when approaching blind corners, door ways, shrubs, trees, or other objects that may obscure your vision of a child who may run into the mower.

• Keep children away from hot or running engines. They can suffer burns from a hot muffler.

SERVICE

Safe Handling of Gasoline:

To avoid personal injury or property damage use extreme care in handling gasoline. Gasoline is extremely flammable and the vapors are explosive. Serious personal injury can occur when gasoline is spilled on yourself or your clothes which can ignite. Wash your skin and change clothes immediately.

• Use only an approved gasoline container.

• Never fill containers inside a vehicle or on a truck or trailer bed with a plastic liner. Always place containers on the ground away from your vehicle before filling.

• Remove gas-powered equipment from the truck or trailer and refuel it on the ground. If this is not possible, then refuel such equipment on a trailer with a portable container, rather than from a gasoline dispenser nozzle.

• Keep the nozzle in contact with the rim of the fuel tank or container opening at all times until fueling is complete. Do not use a nozzle lock-open device.

• Extinguish all cigarettes, cigars, pipes and other sources of ignition.

• Never fuel machine indoors because f lammable vapors will accumulate in the area.

• Never remove gas cap or add fuel while engine is hot or running. Allow engine to cool at least two minutes before refueling.

• Never over-fill fuel tank. To allow for expansion of the fuel, do not fill above the bottom of the fuel tank neck.

• Replace gasoline cap and tighten securely.

• If gasoline is spilled, wipe it off the engine and equipment. Move machine to another area. Wait 5 minutes before starting engine.

SAFETY INSTRUCTIONS

• Never store the machine or fuel container near an open flame, spark or pilot light as on a water heater, space heater, furnace, clothes dryer or other gas appliances.

• To reduce fire hazard, keep machine free of grass, leaves, or other debris build-up. Clean up oil or fuel spillage and remove any fuel-soaked debris.

• Allow machine to cool at least 5 minutes before storing.

General Service:

• Never run an engine indoors or in a poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas.

• Before cleaning, repairing, or inspecting, make certain the blade and all moving parts have stopped. Disconnect the spark plug wire and ground against the engine to prevent unintended starting.

• Check the blade and engine mounting bolts at frequent intervals for proper tightness. Also, visually inspec t blade for damage (e.g., bent, cracked, worn). Replace blade with the original equipment manufacture’s (O.E.M.) blade only, listed in the Parts pages of this manual. Use of parts which do not meet the original equipment specifications may lead to improper per formance and compromise safety!

• Mower blades are sharp and can cut. Wrap the blade or wear gloves, and use extra caution when servicing them.

• Keep all nuts, bolts, and screws tight to be sure the equipment is in safe working condition.

• Never tamper with safety devices. Check their proper operation regularly.

• After striking a foreign object, stop the engine, disconnect the spark plug wire and ground against the engine. Thoroughly inspec t the mower for any damage. Repair the damage before starting and operating the mower.

• Never attempt to make a wheel or cutting height adjustment while the engine is running.

• Grass Bagger components, discharge cover, and trail shield are subject to wear and damage which could expose moving parts or allow objects to be thrown. For safety protection, frequently check components and replace immediately with original equipment manufacturer’s (O.E.M.) parts only, listed in the Parts pages of this manual. Use of par ts which do not meet the original equipment specifications may lead to improper performance and compromise safety!

• Do not change the engine’s governor setting or over-speed the engine. The governor controls the maximum safe operating speed of the engine.

• Check fuel line, tank, cap, and fittings frequently for cracks or leaks. Replace if necessary.

• Do not crank engine with spark plug removed.

• Maintain or replace safety and instruction labels, as necessary.

• Observe proper disposal laws and regulations. Improper disposal of fluids and materials can harm the environment.

• According to the Consumer Products Safety Commission (CPSC) and the U.S. Environmental Protection Agency (EPA), this product has an Average Useful Life of seven (7) years, or 140 hours of operation. At the end of the Average Useful Life have the machine inspected annually by a Sears or other qualified service dealer to ensure that all mechanical and safety systems are working properly and not worn excessively. Failure to do so can result in accidents, injuries or death.

DO NOT MODIFY ENGINE

To avoid serious injury or death, do not modify engine in any way. Tampering with the governor setting can lead to a runaway engine and cause it to operate at unsafe speeds. Never tamper with factory setting of engine governor.

NOTICE REGARDING EMISSIONS

Engines which are certified to comply with California and federal EPA emission regulations for SORE (Small Off Road Equipment) are certified to operate on regular unleaded gasoline, and may include the following emission control systems: Engine Modification (EM), Oxidizing Catalyst (OC), Secondary Air Injection (SAI) and Three Way Catalyst (TWC) if so equipped.

SPARK ARRESTOR

WARNING

This machine is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brushcovered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrestor meeting applicable local or state laws (if any).

If a spark arrestor is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrestor for the muf fler is available through your nearest Sears Parts and Repair Service Center.

SAFETY INSTRUCTIONS

SAFETY SYMBOLS

This page depic ts and describes safety symbols that may appear on this product. Read, understand, and follow all instructions on the machine before attempting to assemble and operate.

Symbol Description

READ THE OPERATOR’S MANUAL(S) Read, understand, and follow all instructions in the manual(s) before attempting to assemble and operate

DANGER — ROTATING BLADES To reduce the risk of injury, keep hands and feet away. Do not operate unless discharge cover or grass bagger is in its proper place. If damaged, replace immediately.

DANGER — BYSTANDERS Do not mow when children or others are around.

DANGER — HAND/ FOOT CUT Keep hands and feet away from rotating parts.

DANGER — THROWN DEBRIS Remove objects that can be thrown by the blade in any direction. Wear safety glasses.

DANGER — SLOPES Use extra caution on slopes. The machine is heavy and can speed up when going downhill. Be prepared to maintain control of the machine. To avoid loss of control, operate across slopes, not up and down. When turning, turn uphill, not down. Do not operate on slopes greater than 15°.

WARNING—GASOLINE IS FLAMMABLE Allow the engine to cool at least two minutes before refueling.

WARNING— CARBON MONOXIDE Never run an engine indoors or in a poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas.

WARNING— HOT SURFACE Engine parts, especially the muffler, become extremely hot during operation. Allow engine and muffler to cool before touching.

WARNING: Your Responsibility—Restrict the use of this power machine to persons who read, understand and follow

the warnings and instructions in this manual and on the machine.

SAVE THESE INSTRUCTIONS!

SLOPE GAUGE

Slopes are a major factor related to slip and fall accidents which can result in severe injury or death.

The machine is heavy and can speed up when going downhill. Be prepared to maintain control of the machine. To avoid loss of control, operate across

slopes, not up and down. When turning, turn uphill, not down. Do not operate machine on slopes in excess of 15 degrees.

5. If there is a gap below the gauge, the slope is too steep for safe operation (See Figure 2 above).

4. Adjust gauge up or down until the left corner touches the slope (See Figure 1 and Figure 2).

3. Align either side of the slope gauge with the object (See Figure 1 and Figure 2 ).

To check the slope, proceed as follows:

1. Remove this page and fold along the dashed line.

2. Locate a vertical object on or behind the slope (e.g. a pole, building, fence, tree, etc.)

(OK) (TOO STEEP)

IF A SLOPE IS TOO STEEP FOR SAFE OPERATION!

USE THIS SLOPE GAUGE TO DETERMINE

Slope Gauge

WARNING

15° dashed line

15° Slope

Figure 2Figure 1

15° Slope

ASSEMBLY

IM PORTANT: This unit is shipped without gasoline or oil in the engine. Be certain to service engine with gasoline and oil as instructed in the Engine Operator’s Manual before starting or running your machine.

NOTE: Reference to right and left hand side of the lawn mower is observed from the operating position.

OPENING CARTON

1. Cut each corner of the carton vertically from top to bottom.

2. Remove all loose parts.

3. Remove loose packing material.

REMOVING UNIT FROM CARTON

1. Lift unit from the rear to detach it from underlying carton material and roll unit out of carton.

2. Check carton thoroughly for any other loose parts.

Loose Parts In Carton

• Side Discharge Cover

• Engine Oil

Figure 2

Assembly

Attaching The Handle

1. Remove any packing material which may be between upper and lower handles.

a. Remove wing nuts and carriage bolts handle as shown in Figure 1.

Do not loosen or remove adjacent hex head screws.

b. While stabilizing mower so it doesn’t move, pivot upper handle up as

shown in Figure 2. Do not crimp cable while lifting the handle up.

2. Remove T-bolts from the handle brackets as shown in Figure 3.

Figure 3

Figure 1

ASSEMBLY

3. Follow the steps below to complete handle assembly: a. Pull upward on the handle until holes in lower handle (shown in

Figure 3 deck cutaway) line up with holes in handle bracket. See Figure 4.

NOTE: When pulling upward on handle, make sure to not pull handle all the way out.

b. Insert the T-bolts removed in Step 2 through the handle brackets

and lower handle and tighten securely to secure the handle in place. See Figure 4.

c. Reattach wing nuts and carriage bolts removed in Step 1 into lower

holes of handle as shown in Figure 5.

4. The rope guide is attached to the right side of the upper handle. Loosen the

wing knob which secures the rope guide. Refer to Figure 6.

a. Hold blade control against upper handle. b. Slowly pull starter rope handle from engine and slip star ter rope into

the rope guide. See Figure 6. c. Tighten rope guide wing knob. d. Use cable ties to secure blade control cable to lower handle.

Attaching the Grass Catcher

1. Follow steps below to assemble the grass catcher. Make certain bag is turned right side out before assembling (warning label will be on the outside).

a. Place bag over frame so that its black plastic side is at the bottom. b. Slip plastic channel of grass bag over hooks on the frame. See Figure 7.

Figure 5

Figure 6

Figure 4

Figure 7

ASSEMBLY

Mulch Cover

Side Discharge

Cover

Lower

Higher

2. Follow steps below to attach grass catcher: a. Lift rear discharge door. b. Place grass catcher into the slots in the handle brackets as shown in

Figure 8. Let go of discharge door so that it rests on the grass catcher.

To remove grass catcher, lift rear discharge door on the mower. Lift grass catcher up and off the slots in the handle brackets. Release rear discharge door to allow it to close rear opening of mower.

Attaching Side Discharge Cover

Your mower is shipped as a mulcher. To convert to side discharge, make sure grass catcher is off of the unit and rear discharge door is closed.

1. On the side of the mower, lift the mulch cover. See Figure 9.

2. Slide two hooks of side discharge cover under hinge pin on mulching cover

assembly. Lower mulching cover. Do not remove side mulching cover at any time, even when you are not mulching.

Adjustments

Cutting Height

There is a cutting height adjustment lever located above the front and rear right wheel.

1. Pull the height adjustment lever outward towards wheel (unit will tend to

fall when lever is moved outward). See Figure 10.

2. Move lever to desired position for a change in cutting height. See Figure 10.

3. Release lever towards deck.

IM PORTANT: All wheels must be placed in the same position. For rough or uneven lawns, move each height adjustment lever to a higher position. This will prevent you from cutting the grass too close to the ground.

Handle Pitch

For convenience of operation, you may adjust the pitch of the handle as follows:

1. Remove wing nuts and carriage bolts from handle. See Figure 11.

2. Position the handle in one of the three positions that is most comfortable.

See Figure 11 inset.

3. Secure into position with wing nuts and carriage bolts removed earlier.

Figure 9

Figure 10

Figure 8

Figure 11

OPERATION

Blade Control

Recoil Starter

Mulch Cover

Cutting Height Adjustment Lever

Side Discharge

Chute

Drive Control

Oil Fill Cap/Dipstick

Blade Control

The blade control is attached to the upper handle of the mower. Depress and squeeze it against the upper handle to operate the unit. Release it to stop engine and blade.

This blade control is a safety device. Never attempt to bypass its operation.

WARNING

Drive Control

The drive control is located on the underside of the upper handle and is used to engage the drive. Squeeze it against the upper handle to engage the drive; release it to slow down or stop mower from propelling.

Cutting Height Adjustment Lever

One adjustment lever is located on the right rear wheel and one is located on the right front wheel. Both levers have to be at the same position to ensure a uniform cut. To adjust the cutting height, refer to the Assembly Section.

Side Discharge Cover

Your mower is shipped as a mulcher. To discharge the grass clippings to the side instead, follow the instructions in the Assembly section to attach the side discharge cover.

Meets ANSI Safety Standards

Craftsman Lawn Mowers conform to the safety standard of the American National Standards Institute (ANSI).

Figure 12

Mulch Cover

The mulch cover is used for mulching purposes. Instead of collecting the grass clippings in a grass catcher or using the side discharge chute, some mower models have the option of recirculating the clippings back to the lawn. This is called mulching.

WARNING

Keep hands and feet away from the chute area on cutting deck. Refer to warning label on the unit.

Trail Shield

The trail shield is attached to the rear of the mower and is there to protect the operator from flying debris. Do not use the mower unless the shield is fully functional and in place.

Recoil Starter

The recoil starter is attached to the right upper handle. Stand behind the unit and pull the recoil starter rope to star t the unit.

Oil fill Cap/Dipstick

Refer to the Engine Operator’s Manual packed with your mower for detailed oil filling, checking and changing instructions.

OPERATION

WARNING

Be sure no one other than the operator is standing near the lawn mower while starting engine or operating mower. Never run engine indoors or in enclosed, poorly ventilated areas. Engine exhaust contains carbon monoxide, an odorless and deadly gas. Keep hands, feet, hair and loose clothing away from any moving parts on engine and lawn mower.

TO START ENGINE

1. Standing behind the mower, squeeze the blade control handle against upper

handle.

2. Holding these two handles together firmly, grasp recoil starter handle and

pull rope slowly until resistance is felt, then pull with a rapid, continuous, full arm stroke. See Figure 13. Keeping a firm grip on the starter cord handle, let the rope rewind slowly. Repeat until engine cranks. Let the rope rewind each time slowly.

WARNING

Keep a firm grip on the starter cord handle to prevent rapid retraction of starter cord (kickback). Rapid retraction can pull hand and arm toward engine faster than you can let go, and result in broken bones, fractures, bruises or sprains.

TO STOP ENGINE

1. Release blade control to stop the engine and blade.

WARNING

Wait for the blade to stop completely before performing any work on the mower or to remove the grass catcher.

Figure 13

Using as Mulcher

For mulching grass, remove the grass catcher or side discharge chute from the mower. When you remove the grass catcher from the mower, the rear discharge door will close. When you remove the side discharge chute, the mulching cover will close. For effective mulching, do not cut wet grass. If the grass has been allowed to grow in excess of four inches, mulching is not recommended. Use the grass catcher to bag clippings instead.

Using Your Lawn Mower

Be sure lawn is clear of stones, sticks, wire, or other objects which could damage lawn mower or engine. Such objects could be accidently thrown by the mower in any direction and cause serious personal injury to the operator and others.

1. Once the engine is running, squeeze the drive control against the upper

handle to propel mower.

WARNING

The operation of any lawn mower can result in foreign objects being thrown into the eyes, which can damage your eyes severely. Always wear safety glasses while operating the mower, or while performing any adjustments or repairs on it.

Using Grass Catcher

You can use the grass catcher to collect clippings while you are operating the mower.

1. Attach grass catcher following instructions in the “Assembly” section. Grass clippings will automatically collect in bag as you run mower. Operate mower until grass bag is full.

2. Stop engine completely by releasing the blade control. Make sure that the unit has come to a complete stop.

3. Lift discharge door and pull grass bag up and away from the mower to remove the bag. Dispose of the grass clippings and reinstall the bag when complete.

WARNING

If you strike a foreign object, stop the engine. Disconnect the spark plug wire, thoroughly inspect mower for any damage, and repair damage before restarting and operating. Extensive vibration of mower during operation is an indication of damage. The unit should be promptly inspected and repaired.

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