MTD 12BV829Q755 Operator's Manual page 14

21" rotary mower
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Problem
Cause
Remedy
Ena ne fa sto start
1. Bladecontroldisengaged,
i. Engagebladecontro!.
sParkPiugwiie disconnected:
conneO!wiretOspark plugl
3.
Fueltank empty or stale fuel.
& Filltank with clean,fresh gasolinel
4. Enginenot piimed(if equippedwth
4. prime engineaS instr,u, cted in Operat,
primer)i
ing Your Lawn Mower.
Faultyspark p ugl
c ean adjustgap or repiacel
61 BloCked fuel linel
clean fuellinel
7: Engineflooded.
7.
Wait a few minutesto restait,but do
I
notprimel
"
8. Fue!valve(if equipped)closed,
&
Open fuel va! v e: See enginemanuaI.
...........
91 Enginenot choked (if equippedw/choke).
9. Choke engine:Seeengine manual.
For repairsbeyond
minor adjustments
listed here, contact
an authorized service
dealer.
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.
Eng ne overheats
1. Engineoil levellow.
1. Fillcrankcasewith proper oil.
2. Air flow restricted.
2. Removeblowerhousing
and c ean.
3. Carburetornot adjustedproperly.
3. Referto engine manual.
I
Occasional skips
1. Sparkplug gap too close.
1. Adjustgap to .030".
(hesitates) at
2. Carburetoridlemixtureadjustment
2. Referto engine manual.
high speed
improperly
set.
Idles poorly
1. Sparkplug fouled, faulty or gap
1. Resetgapto .030"or replace
-
-
too wide.
_
spark plug.
I
2. Carburetorimproperlyadjusted.
2. Referto engine manual.
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 Lswet; walt
mulch clrass/If
I
I
untillater to cut.
._
,_"
I
2 Excessve y h gh grass
2. Mowonce at a high cutting height
_-qulppea_
then mowagainat desiredheight 'or
I
makea narrowercutting path.
I
3. Dullblade.
I
3. Sharpenor replaceblade.
H
Unevencut
1. Wheelsnot positionedcorrectly.
1. Placeall four wheelsin same
heightposition.
2. Dull blade.
2. Sharpenor replaceblade.
1. Belt not insialled properly.
1. Check belt for proper pulleyinstallation
Mower
will
not
seIf propeI
'
,
and movement.
2. Debrs clogg ng driveoperation
2. Stop engine,disconnectsparkplug
wire and clean out debris.
3. Damagedor wornbelt.
3. Inspectand replacebelt.
14

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