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8. Maintenance

IMPORTANT

•  Note that using any spark plug other than those des

-

ignated may result in the engine failing to operate 
properly or in the engine becoming overheated and 
damaged.

•  To install the spark plug, first turn the plug until it is 

finger tight, then tighten it a quarter turn more with a 
socket wrench.

Tightning torque: 
  9.8~11.8N.m. 
  (1.0~1.2kgm)

 GEAR CASE

•  The reduction gears are lubricated by multipurpose, 

lithium-based grease in the gear case. Supply new 
grease every 25 hours of use or more often depend-
ing on the job condition. 

•  Remove the bolt opposit to the grease nipple before 

installing new grease to arrange for old grease to exit. 

WARNING

Make 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, if clogged, will reduce the engine perfor-
mance. Check and clean the filter element in warm, 
soapy water as required. Dry completely before installing. 
If the element is broken or shrunk, replace with a new 
one.

(1) Air filter

 FUEL FILTER

When the engine runs short of fuel supply, check the fuel 
strainer for blockage.

(1) Fuel strainer

 SPARK PLUG

Starting failure and misfiring are often caused by a fouled 
spark plug. Clean the spark plug and check that the plug 
gap is in the correct range. For a replacement plug, use 
the correct type specified by ZENOAH.

0.6~0.7mm

REPLACEMENT PLUG IS 
A NGK BPMR7A.

GB-12

BC3450DW / BC4350DW

BC3450DW_4350DW_GB_cs5.indd   12

17/09/05   17:04

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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