Yard Machines 840 Thru 849 Lawn Mower User Manual


 
SECTION11: TROUBLESHOOTING
Corrective Action
Trouble
Enginewill not 1.
crank
2.
3.
4.
5.
Enginecranks 1.
butwillnotstart
2.
3.
4.
5.
6.
Enginesmokes 1.
2.
3.
Excessive 1.
vibration
2.
Mower willnot 1.
dischargegrass 2.
or leavesuncut 3.
strips 4.
Possible Cause(s)
Safetyswitchbuttonnot
depressed.
Battery installed incorrectly.
Batteryis deadorweak.
Blownfuseorcircuitbreaker
Engine ground wire loose.
Throttle or choke not in
starting position
No fuel to the carburetor
Fuel line or in-linefuel filter
plugged
Spark pluglead
disconnected
Faulty sparkplug
Dirtyaircleaner
Engineoil hasbeen
overfilled.
Dipsticknotseatedand/or
broken.
Enginelosescrankcase
vacuum.
Looseboltorpart,
Bent or damaged blade.
Engine speed low.
Speed selection.
Cutting height set too low.
Blades short or dull.
1. There are two switches in the starting cimuit of your unit:the clutch
pedal switch and the deck liftlever switch. Make certain the actuator
isfully depressing the buttons on each switch.
2. The battery must be installed with negative terminal attached to black
ground wire. Negative terminal is identified at the post by "NEG", "N" !
or"-". The positive terminal, identified by "POS', "P" or "+", must be
attached to the big red wire which goes to the solenoid, All batteries
are to be fully charged before installing. Refer to "Quick Start" battery
guide that came with the operator's manual.
3. Check fluid level in battery. If fluid islow, fill to just below split rings
with water. Charge with 6 AMP charger untilthe battery is fully
charged.
4. Refer tothe illustrated parts list forfuse box location. Replace fuse
with automotive type fuse. Fuses seldom fail without a reason. The
problem must be corrected. Check for loose connections in the fuse
holder. Replace fuse holder it necessary. A dead short may be inthe
cranking or charging circuit where the insulation may have rubbed
through and exposed the bare wire. Replace the wire or repair with
electrician's tape ifthe wire strands have not been damaged.
Note: Look for a wire pinched between body panels, burned by the
exhaust pipe or muffler or rubbed against a moving part.
i 5. Engine should have a black ground wire runningfrom engine to frame
or mounting bolt.
1. Check operator's manual for correct position for throttle control and
choke forstarting.
2. Gasoline tank empty. Filltank.
3. Remove and clean fuel line. Replace filter if necessary.
4. Connectlead.Holdsparkplugleadawayfromengineblockabout1/
8".Crank engine,There shouldbea spark.Ifnot, haveengine
repairedat authorizedengineservicedealer.
5. To test,removesparkplug.Attachsparkplugleadtosparkplug,
Groundthe sparkplugbodyagainstthe engineblock.Crankthe
engine.The sparkplugshouldfire at the electrode.Replaceif ifdoes
not.
J6. Refertotheenginemanual.
1. Checkoil level,
2. Re-insert dipstick properly. Replace defective part if needed.
3. Enginebreatherdefective.Replacefollowingenginemanual.
1. Stop engineimmediately.Checkallpulleys,bladeedapters, keysand
boltsfortightnessandspindledamage.Tightenor replaceany
damagedparts.
2. Replacebladefollowing instructioninthismanual,
1. Throttlemustbeset atfullthrottle,
2. Use lowergroundspeed.
3. Raisedeck.
4. Sharpenor replaceblades(uncutstrip problemonly).
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