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MTD 12B-569Q755 Operator's Manual page 12

21" rotary mower

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Trou b.le
Shooting
For repairs beyond
the minor adjustments
listed here, contact
an authorized service
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[
Problem
Cause
Remedy
I
Engine fails to start
Blade controldisengaged.'
11 Engage blade contrOL
2. spark plug w re disconnected,
z connect wireto spark plugl
3. Fueltank empty or stale fue!.
.
3. Fil!tank with clean fresh gasoline.
4. Engine not piimed:
4. pr me engne as Ustructedn operat,
ing Your Lawn Mower!!.
5.
Faultysparkpug.
5,
Clean adjustgap orreplacel
Blockedfuel line:
[6.
clean fuel
7; Engineflooded.
7: Wait a few minutesto restartbut do
not prme
Engineruns erratic
1. Sparkplug wire loose.
1. Connect andtighten sparkplug wire.
2. Blockedfuel lineor stale fuel.
2. Clean fuel line; fill tank withclean,
3. Ventingas cap plugged.
4. Wateror dirt infuel system.
5. Dirtyair cleaner.
6. Carburetorout of adjustment.
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.
2. Air flow restricted.
2. Removeblowerhousing
and clean.
[
3. Carburetornot adjustedproperly.
[
3. Referto engine manua.
Occasional skips
1. Sparkplug gap too close.
1. Adjustgap to .030".
(hesitates) at
2. Carburetoridlemixtureadjustment
2. Referto engine manual.
high speed
improperly
set.
d
es Door v
1. Sparkplug fouled, faulty or gap
1. Resetgapto .030"or replace
"
"
too wide.
spark plug.
2. Carburetorimproperlyadjusted.
[
2. Referto engine manual.
i
3 Dirtyair cleaner
3
Referto engine manual
.
"
,
.
"
,
Excessive
1. Cuttingbladeloose or unbalanced.
1. Tighten bladeandadapter.Balance
Vibration
blade.
2. Bentcutting blade.
2. See an authorizedservicedealer.
Mower will not
1. Wetgrass.
1. Donot mowwhen grass is wet; wait
much _rass ' f
_
_
until laterto cut.
E
9
.:t
2. Excessivelyhigh grass.
2. Mowonce at a high cutt ng height
quppeo)
then mowagainat desiredheight or
make a narrowercuttng path.
.
3. Dullblade.
.
3. Sharpenor replaceblade
Unevencut
1. Wheelsnot positionedcorrectly.
1. Placeall four wheelsin same
heightposition.
2. Dull blade.
2. Sharpenor replaceblade.
Mower w not
1. Belt not installedproperly.
1. Check belt for proper pu leyinstallation
If r
I
'
,
and movement
se p ope
2. Debrs clogging driveoperation.
2. Stop engine,disconnectsparkplug
[
[
w re and c ean out debr s
i
3. Damagedorworn belt.
'
3. Inspectand replacebelt.
12

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This manual is also suitable for:

560 series