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MTD 12A-559Q795 Operator's Manual page 12

21-inch self-propelled mower

Table Of Contents

Table of Contents

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For repairs beyond

the minor adjustments

listed here, contact

an authorized service

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Problem

Cause

Remedy

Engine fails to start I

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Biadecontroldisengaged.

Engage bladecontro!.

spark plug Wiredisconnected:

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21 c0nnect wireto sPa[k piugl

Engineruns erratic

1. Sparkplug wire loose.

2. Blockedfuel lineor stale fuel.

3. Ventingas cap plugged.

4. Wateror dirt infuel system.

5. Dirtyair cleaner.

6. Carburetorout of adjustment.

1. Connect andtighten sparkplug wire.

2. Clean fuel line; fill tank withclean,

fresh gasoline.

3. Clear vent.

4. Drainfuel tank. Refillwithfresh fuel.

5. Referto engine manual.

6. Referto engine manual.

Engine overheats

1. Engineoil levellow.

1. Fillcrankcasewith proper oil

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2. Air flow restricted.

2. Removeblowerhousing

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and clean.

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3. Carburetornot adjustedpropery.

3. Referto engne manua.

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Occasional skips

1. Sparkplug gap too close.

1. Adjust gapto .030".

(hesitates) at

2. Carburetoridlemixtureadjustment

2. Referto engine manual.

high speed

improperly

set.

Idles noorlv

1 Sparkplug fouled, faulty or gap

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1. Resetgapto .030"or replace

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too wide.

spark plug.

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2. Carburetorimproperlyadjusted.

2

Referto engine manual.

3. Drtyarceaner,

.

3. Refertoengnemanua.

Excessive

1. Cuttingbladeloose or unbalanced.

1. Tighten bladeandadapter.Balance

Vibration

blade.

2. Bentcutting blade.

2. See an authorizedservicedealer.

Mower will not

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1. Wetgrass.

1. Donot mowwhen grass is wet; wait

much _rass ' f

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until laterto cut,

E u y _d,t

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2. Excessivelyhigh grass.

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2. Mowonce atahigh cutting height

q PP )

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then mowagainat desiredheight or

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makea narrowercutting path,

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3. Du bado.

3. Sharpenor replaceblade.

Unevencut

1. Wheelsnot positionedcorrectly.

1. Placeall four wheelsin same

heightposition.

2. Dull blade.

2. Sharpenor replaceblade.

Mower will not

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1. Belt not installedproperly.

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1. Check belt for proper puley installation

seIf propeI

'

and movement.

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2. Debrs clogg ng driveoperation.

2, Stop engine,disconnectsparkplug

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wire and clean out debris.

.

3. Damagedorworn belt.

.

3. Inspectand replacebelt.

12

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