Craftsman 247.77638 Operator's Manual page 19

Beforeperforming anytyped maintenance/service, disengage all
controls and stoptheengine.Waituntilall moving partshavecometo
a complete stop.Disconnect sparkplugwireandgrounditagainstthe
engine to prevent u nintended starting. A lways wearsafety glassesduring
operation or whileperforming anyadjustments o r repairs.
Enginefails to start
Enginerunserratically
1. Throttlelevernot in correctstartingposition
2. Chokenot in the CHOKEposition
3. Sparkplugwire disconnected
4. Faultyspark plug
5. Fueltank emptyor stale fuel
6. Cannotpull recoilcord
7. Engineflooded
1. Unit runningon CHOKE
2. Sparkplugwire loose
3. Stalefuel
4. Wateror dirt in fuel system
5. Dirtyair cleaner
6. LowengineRPM
7. Carburetor out of adjustment
1. Engineoil levellow
2. Air flow restricted
Engineoverheats
Enginehesitatesat high RPMs 1. Sparkpluggap settoo close
Engineidles poorly 1. Fouledspark plug
2. Dirtyair cleaner
Excessive vibration 1. Loosepartsor damagedimpeller
Unitdoes notdischarge 1. Chute ddlector clogged
Rateof dischargeslows
considerablyor compositionof
dischargedmaterialchanges
2. Foreignobject lodgedin impeller
3. Lowengine RPM
1. LowengineRPM
2. Chipperbladedull
1. Movethrottleleverto START/RUN position.
2. MoveCHOKEto the CHOKEposition.
3. Connectwireto spark plug.
4. Clean, adjustgap,or replace.
5. Filltank with clean,fresh gasoline.
6. Obstructionlodgedin impeller.Disconnectspark
plugwire and removelodgedobject.
7. Wait a few minutesto restart.
1. Movechokeleverto the RUNposition.
2. Connectand tightenspark plugwire.
3. Filltank with fresh gasoline.
4. Refillwith fresh fuel.
5. Cleanor replaceair cleanerfilter.
6. Alwaysrun engineat full throttle.
7. Contactyour SearsParts& RepairCenter.
1. Fillenginewith properamountand type of oil.
2. Cleandebrisfrom aroundthe engine'scoolingfins
and blowerhousing.
1. Removesparkplug and adjustgap.
1. Replacesparkplug and adjustgap.
2. Replaceair cleanercartridge.
1. Stopengineimmediately and disconnectsparkplug
wire. ContactyourSearsParts & RepairCenter.
1. Stopengineimmediately and disconnectspark
plugwire. Cleanflail screenand insided discharge
opening.
2. Stopengineand disconnectspark plugwire.
Removelodgedobject.
3. Alwaysrun engineat full throttle.
1. Alwaysrun engineat full throttle.
2. Replaceor sharpenchipperbladeor contactyour
SearsParts& RepairCenter.
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