Yard Machines through 429, 410 Trouble Shooting Guide, Trouble Possible Causes Corrective Actions

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SECTION 9: TROUBLE SHOOTING GUIDE

Trouble

Possible Cause(s)

Corrective Actions

Engine fails to

1.

Blade control handle disengaged.

1.

Engage blade control handle.

start

2.

Spark plug wire disconnected.

2.

Connect wire to spark plug.

 

3.

Dirty aircleaner.

3.

Refer to the engine manual packed with your unit.

 

4.

Primer button not depressed.

4.

Refer to the engine manual packed with your unit.

5.Throttle control lever (if so equipped) not 5. Move throttle lever to FAST or START position. in correct starting position .

 

6.

Fuel tank empty or stale fuel.

6.

Fill tank with clean fresh gasoline. Fuel will not last

 

 

 

 

over thirty days unless a fuel stabilizer is used.

 

7.

Blocked fuel line

7.

Clean fuel line.

 

8.

Faulty spark plug.

8.

Clean, adjust gap or replace.

 

9.

Engine flooded.

9.

Refer to the engine manual packed with your unit.

Engine runs

1.

Unit running in START position.

1.

Move throttle lever to FAST position.

erratic

2.

Spark plug wire loose.

2.

Connect and tighten spark plug wire. Check spark

 

 

 

 

plug for fouling.

 

3.

Blocked fuel line (if so equipped) or stale

3.

Clean fuel line; fill tank with clean, fresh gasoline.

 

 

fuel.

 

Fuel will not last over thirty days unless a fuel

 

 

 

 

stabilizer is added.

 

4.

Vent in gas cap plugged.

4.

Clear vent or threads or replace.

 

5.

Water or dirt in fuel system.

5.

Drain fuel tank. Refill with fresh fuel.

 

6.

Dirty air cleaner.

6.

Refer to the engine manual packed with your unit.

 

7.

Carburetor out of adjustment.

7.

Refer to the engine manual packed with your unit.

Engine

1.

Engine oil level low.

1.

Fill crankcase with proper oil.

overheats

2.

Dirty aircleaner.

2.

Refer to the engine manual packed with your unit.

 

3.

Air flow restricted.

3.

Stop engine and disconnect spark plug wire. Remove

 

 

 

 

blower housing and clean.

 

4.

Carburetor not adjusted properly.

4.

Refer to the engine manual packed with your unit or

 

 

 

 

see an authorized service dealer.

Occasional

1.

Spark plug gap too close.

1.

Adjust gap to .030".

skip (hesitates)

2.

Carburetor idle mixture adjustment

2.

Refer to the engine manual packed with your unit.

at high speed

 

improperly set.

 

 

Idles poorly

1.

Spark plug fouled, faulty or gap too wide. 1.

Reset gap to .030" or replace spark plug.

 

2.

Carburetor improperly adjusted.

2.

Refer to the engine manual packed with your unit.

 

3.

Dirty air cleaner.

3.

Refer to the engine manual packed with your unit.

Excessive

1.

Cutting blade loose or unbalanced.

1.

Tighten blade and adapter. Balance blade.

vibration

2.

Bent cutting blade.

2.

See an authorized service dealer.

Mower will not

1.

Engine speed too low.

1.

Set throttle between 3/4 and full throttle.

mulch grass

2.

Wet grass.

2.

Do not mow when grass is wet; wait until later to cut.

 

3.

Excessively high grass.

3.

Mow once at a high cutting height, then mow again at

 

 

 

 

desired height or make a narrower cutting swath (1/2

 

 

 

 

width).

Uneven cut

1.

Wheels not positioned correctly.

1.

Place all four wheels in same height position.

 

2.

Dull blade.

2.

Sharpen or replace blade.

NOTE: For repairs beyond the minor adjustments above, contact your local authorized service dealer or call Customer Service at 1(330) 220-4MTD or 1(800)800-7310.

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Contents Operator’s Manual Table of Contents Important Safe Operation Practices General OperationService Slope OperationChildren Do NotPage Slope Gauge CUT Along Dotted LineDisconnect Spark Plug Wire Assembling Your Lawn MowerUnpacking Tools RequiredSoft Grass Bag Assembling Grass CatcherHardtop Grass Bag To attach the grass catcher Lift the rear Assembling Chute DeflectorTo remove the grass catcher Lift the rear Know Your Lawn Mower Blade Control HandleUsing Rotary Mower Operating Your Lawn MowerGas And Oil Fill-Up Before StartingHandle Height Using MulcherCarburetor Throttle Control Briggs & Stratton EnginesQuantum Models Tecumseh EnginesMaintaining Your Lawn Mower Lubrication Maintaining the BladeMaintaining the Deck EngineReplacing Rear Flap Blade Mounting TorqueTrouble Shooting Guide Trouble Possible Causes Corrective ActionsShroud Chart Shroud ColorParts List for Model Series 410 Through Description Wheel ChartType of Wheel Tread Color MANUFACTURER’S Limited Warranty for
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21" Rear Discharge Push Mower, through 429, 410 specifications

The Yard Machines 410 through 429, 21" Rear Discharge Push Mower is a robust and versatile lawn care solution designed for homeowners who prioritize efficiency and convenience. This highly regarded mower stands out in the market thanks to its state-of-the-art features and technology that enhance mowing performance.

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