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8. Maintenance

 INTAKE AIR COOLING VENT

WARNING

• 

Never touch the cylinder, muffler, or spark plugs 
with your bare hands immediately after stopping 
the engine.  The engine can become very hot when 
in operation, and doing so could result in severe 
burns.

• 

When checking the machine to make sure that it 
is okay before using it, check the area around the 
muffler  and  remove  any  wood  chips  or  leaves 
which have attached themselves to the brushcut-
ter.  Failing  to  do  so  could  cause  the  muffler  to 
become overheated and that in turn could cause 
the engine to catch on fire.  Always make sure that 
the muffler is clean and free of wood chips, leaves, 
and other waste before use.

• 

Check  the  intake  air  cooling  vent  and  the  area 
around  the  cylinder  cooling  fins  after  every  25 
hours of use for blockage, and remove any waste 
which has attached itself to the brushcutter. Note 
that  it  is  necessary  to  remove  the  engine  cover 
shown in in order to be able to view the upper part 
of the cylinder.

IMPORTANT

If waste gets stuck and causes blockage around the 
intake air cooling vent or between the cylinder fins, it may 
cause the engine to overheat, and that in turn may cause 
mechanical failure on the part of the brushcutter.

(1) Cylinder
(2)  Intake air cooling 

vent

 MUFFLER

WARNING

• 

Inspect periodically, the muffler for loose fasten-
ers, any damage or corrosion. If any sign of ex-
haust leakage is found, stop using the machine 
and have it repaired immediately. 

  Note that failing to do so may result in the engine 

catching on fire.

  PROCEDURES TO BE PERFORMED AFTER 

EVERY 100 HOURS OF USE

1.  Remove the muffler, insert a screwdriver into the vent, 

and wipe away any carbon buildup. Wipe away any 
carbon buildup on the muffler exhaust vent and cyl-
inder exhaust port at the same time.

2.  Tighten all screws, bolts, and fittings.
3.  Check to see if any oil or grease has worked its way 

in between the clutch lining and drum, and if it has, 
wipe it away using oil-free, lead-free gasoline.

 MAINTENANCE BEFORE STORAGE

•  Old  fuel  left  in  the  carburetor  may  cause  starting 

failure. When a series of operation finished, make sure 
to empty the fuel tank and drain the carburetor.

•  Check all parts and the functions. If the failured or 

damaged parts have been found, replace them with 
new ones.

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BC3450DW / BC4350DW

BC3450DW_4350DW_GB_cs5.indd   13

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Summary of Contents for BC3450DW

Page 1: ...s please read this manual carefully to understand the proper use of your unit Keep this manual handy Original Language OWNER S MANUAL BRUSH CUTTERS BC3450DW BC4350DW 115 94 41 38 1709 G B BC3450DW_435...

Page 2: ...hine if you use the remodeled brushcutter or if you don t observe the proper usage written in the manual 15m 50ft 1 2 3 4 5 6 7 1 Warning labels on the machine SAFETY FIRST Instructions contained in w...

Page 3: ...L D Displacement cc 33 6 41 5 Carburetor Diaphragm Fuel Mixture ratio 50 1 Gasoline and 2cycle oil Fuel tank capacity litter 0 74 0 94 Service range rpm 5000 8000 Spark plug NGK BPMR7A Clutch system T...

Page 4: ...slippery or when you can t maintain a steady posture 2 At night at times of heavy fog or at any other times when your field of vision might be limited and it would be difficult to gain a clear view o...

Page 5: ...llic parts of the engine while the engine is in op eration or immediately after shut tions as to sound level and hours of operations for the product BEFORE STARTING THE ENGINE 1 The area within a peri...

Page 6: ...ng so might result in the product be coming damaged during opera tion or the product becoming unable to operate properly HANDLING FUEL 1 The engine of the ZENOAH prod uct is designed to run on a mixed...

Page 7: ...ize that blade thrust can happen By understanding and knowing about bounce you can help eliminate the element of surprise 2 Cut fibrous weeds and grass only Do not let the blade contact materials it c...

Page 8: ...tch wires between the engine and the main unit Pair the wires of the same color PROTECTOR Wrap the protector around the outer pipe as shown in the figure and fasten the magic fastener 1 Protector BLAD...

Page 9: ...tate depending on oil ingredients sufficient agita tion is necessary for the engine to last long Be care ful that if the agitation is insufficient there is an in creased danger of early piston seizing...

Page 10: ...tes before starting operation NOTE 1 When restarting the engine immediately after stopping it leave the choke open 2 Overchoking can make the engine hard to start due to excess fuel When the engine fa...

Page 11: ...the STOP position 1 1 Stop switch IMPORTANT Except for an emergency avoid stopping the engine while pulling the throttle lever ADJUSTMENTS Throttle cable The normal play is 1 or 2 mm when measured at...

Page 12: ...ke sure that the engine has stopped and is cool before performing any service to the machine Con tact with moving cutting head or hot muffler may result in a personal injury AIR FILTER The air filter...

Page 13: ...nt or between the cylinder fins it may cause the engine to overheat and that in turn may cause mechanical failure on the part of the brushcutter 1 Cylinder 2 Intake air cooling vent MUFFLER WARNING In...

Page 14: ...n the throttle full open and pull out the rope repeatedly page 10 Clogging of the muffler exhaust vent Clean the muffler page 13 Contamination of the spark plug elec trodes Short circuit or breaking o...

Page 15: ...ART THAT IS EQUIVALENT IN PERFORMANCE AND DURABILITY MAY BE USED IN NON WARRANTY MAINTENANCE OR REPAIRS AND SHALL NOT REDUCE THE WARRANTY OBLIGATION OF THE COMPANY THE COMPANY IS LIABLE FOR DAMAGES TO...

Page 16: ...Privado Professional Profesional Rental Alquiler Purchaser Comprador Name Nombre Dealer Vendedor Name Nombre Address Phone Direcci n Tel fono Address Phone Direcci n Tel fono To Purchaser When your u...

Page 17: ...PRINTED IN JAPAN BC3450DW_4350DW_2 _Cover_CS5_ indd 4 17 09 14 16 43...

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