Zenoah BK3420FL Owner's Manual
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Zenoah BK3420FL Owner's Manual

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OWNER'S MANUAL
BRUSHCUTTER
BK3420FL
Caution
• Before using our products, please read
this manual carefully to understand the
proper use of your unit.
• Keep this manual handy.
848G5C93A1 (406)

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Summary of Contents for Zenoah BK3420FL

  • Page 1 848G5C93A1 (406) OWNER’S MANUAL BRUSHCUTTER BK3420FL Caution • Before using our products, please read this manual carefully to understand the proper use of your unit. • Keep this manual handy.

  • Page 2: Table Of Contents

    SAFETY FIRST Instructions contained in warnings within this manual marked with a symbol concern critical points which must be taken into consideration to prevent possible serious bodily injury, and for this reason you are requested to read all such instructions carefully and follow them without fail.

  • Page 3: Parts Location

    1. Parts Location 1. Muffler 14. Tangle-prevention cover 2. Fuel tank 15. Blade (Blade is not included) 3. Fuel tank cap 16. Blade cover 4. Shoulder frame 17. Debris guard 5. Shoulder belt 18. Main pipe 6. Hanging belt 19. Loop handle 7.

  • Page 4: Safety Precautions

    3. Safety Precautions ■ BEFORE USING THE MACHINE g. Lack of sleep, tiredness, or physical exhaustion results in lower attention spans, and this in turn a. Read this owner's manual carefully to understand how to operate this unit properly. leads to accidents and injury. Limit the amount of time over which the product is to be used continuously to somewhere around 30~40 minutes per session, and take...
  • Page 5 3. Safety Precautions 5. Whistle (for collaboration or emergency) person using the product should be considered 6. Hatchet or saw (for removal of obstacles) a hazardous area into which no one should c. Never use your product when wearing pants enter while the product is in use, and when with loose cuffs, when wearing sandals, or necessary yellow warning rope, warning signs...
  • Page 6 If someone calls out while working ,always be be sure to use only ZENOAH products or sure to turn off the engine before turning products which have been certified by around.

  • Page 7: Set Up

    4. Set Up WARNING • Assemble each part correctly. Wrong assembly might cause an accident. • If you cannot do the assembling yourself, consult the shop where you bought this product. ■ ATTACHING THE SHOULDER STRAP (SE1) 1. Pass the ring of the shoulder strap through the hook(A) and fix it by the bolt securely.
  • Page 8 4. Set Up 7. Align the throttle cable along with the liner and tie it with band. (SE4) (1) Band (2) Throttle cable (3) Tie loosely 8. Stretch the main pipe and the flexible shaft straight, thrust the inner shaft into the main pipe while turning it by hand, and connect the inner shaft to the shaft of the main pipe.
  • Page 9 4. Set Up ■ INSTALLING DEBRIS GUARD WARNING Do not use this machine without the debris guard. Fit the top of the debris guard to the gear case, install the debris guard on the main pipe with the accessory clamp, and tighten the debris guard evenly with two Phillips screws (M5xL25).
  • Page 10 SE11 • Do not install or remove the blade while the engine is in operation. • Use ZENOAH’s genuine replacement blades and metal fixtures when installing the blade. • When installing or removing the blade, fix the machine securely, and wear robust gloves.
  • Page 11 When using the nylon cutter, carefully note the following. • Use ZENOAH’s genuine nylon cutter. When using a commercially-available nylon cutter, make sure that it is no longer than 10 cm in external shape.

  • Page 12: Fuel

    2-cycle engine oil into a mixing container in accordance with the following ratios and then shaking to mix well. Mixing ratios: When using Zenoah genuine 2-cycle oil (FC grade): 50:1 (100 ml of oil for every 5 liters of gasoline) When using commercially available 2-cycle oil (FB...

  • Page 13: Operation

    6. Operation ■ REFUELING WARNING • Refuel the fuel tank in a flat place outdoors. Avoid smoking or bringing any flame or spark near the fuel, and stub out any cigarette. • When refueling the fuel tank while using this machine, make sure to stop the engine and allow it to cool before refueling the fuel tank.
  • Page 14 6. Operation ■ STARTING THE ENGINE • Do not start the engine with the throttle lever kept pulled because the blade will WARNING immediately begin to move upon starting the engine. When starting the engine, place • Before starting the engine after filling with the machine on a flat and firm place, and fuel, move the machine at least 3 m away keep all objects away from the blade.
  • Page 15 6. Operation 1. Open the fuel cock. (OP2) 2. Raise the choke lever on the right of the air cleaner to close the choke. NOTE When you start the engine again immediately after stopping it, pull out the starter rope while keeping the choke opened. (1) Choke lever (2) Close (3) Open...
  • Page 16 6. Operation ■ STOPPING THE ENGINE WARNING • Stop the engine immediately in an emergency. • The blade rotates by inertia for a while after the engine has stopped. Do not touch the blade until the engine has stopped completely. •...
  • Page 17 6. Operation rotating. • When shouldering the main body of the brushcutter, be careful that the throttle wire does not get tangled, and that the blade does not touch the ground. WARNING This product employs a plot type carburetor. If the engine is tilted too much, the fuel in the breather or carburetor of the fuel tank might leak out.
  • Page 18 6. Operation ■ WHEN USING A METAL BLADE • Swing the blade from right to left to cut grass. • To cut usual grass, use the part of the blade corresponding to 1/2 of the diameter of the blade. To cut tough weeds such as Japanese pampas grass and Solidago altisima, use the part of the blade corresponding to 1/3 of the diameter of the blade.

  • Page 19: Maintenance

    • Be sure to stop the engine when carrying out inspection and maintenance. • Do not modify the machine or disassemble the engine. • Use ZENOAH’s genuine parts or designated parts when replacing parts. • If you cannot inspect or maintain the machine yourself, contact the shop where you bought it.
  • Page 20 7. Maintenance ■ BLADE (OPTION) WARNING Blade is not included • When checking the blade, be sure to stop WARNING the engine and wear gloves. Handling the blade with bare hands might cause an • In order to carry out cutting work safely, be injury.
  • Page 21 7. Maintenance ■ AIR CLEANER Take off the air-cleaner cover and remove the dust inside the air cleaner every 25 hours of use. When the air-cleaner element has become extremely contaminated, clean it thoroughly with warm water including a neutral detergent. Install it after drying it completely. When the air-cleaner element has become deformed or damaged, replace it with a new one.
  • Page 22 7. Maintenance ■ FUEL FILTER WARNING When you mount or dismount the fuel filter, be careful not to damage the rubber packing. A damaged rubber packing or insufficient mounting of the fuel filter will cause fuel to leak. Check how heavily the fuel filter is clogged from the fueling port of the fuel tank every 25 hours of use.
  • Page 23 7. Maintenance ■ AIR COOLING VENT WARNING Do not put any waste into the intake air-cooling vent while the machine is in operation. It might touch the rotating part, causing danger. Check the intake air-cooling vent and the cooling fin of the cylinder, and remove any dirt attached thereto every 25 hours of use.
  • Page 24 7. Maintenance ■ MAINTENANCE EVERY 100 HOURS (MA9) (MA10) 1. Remove the muffler, insert a screwdriver into the vent, and wipe off any carbon. Also, wipe off any carbon at the muffler outlet. (1) Screwdriver (2) Muffler 2. Further tighten all screws, bolts and fittings. 3.
  • Page 25 7. Maintenance engine does not stop). The engine revolution speed increases when you turn the idling adjustment screw clockwise, and decreases when you turn it counterclockwise. Standard idling revolution speed: 2,300 to 2,700 rpm (1) Idling adjustment screw ■ MAINTENANCE BEFORE LONG-TERM STORAGE WARNING This machine is highly inflammable.

  • Page 26: Storage

    • When the symptoms in the left column do not improve after taking the measures in the right column, please contact the shop where you bought this product. • For the measures marked with ✩, please buy ZENOAH’s genuine parts at the shop where you bought this product. WARNING •...
  • Page 27 33.6 Fuel Used Lubricating oil mixed gasoline Lubricating Oil Used 2-cycle engine oil Mixing rate when using ZENOAH genuine oil (FC grade): 50:1 Engine when using market oil (FB grade): 25:1 Carburetor Float-type piston valve Sparking Method Fly wheel magnet (CDI)

  • Page 28: Specifications

    ● Before using this product, make sure there is no broken or cracked part of the blade. ● Never use a blade that is broken, deformed, or worn down. Use Zenoah’s genuine blades. ● Two-tooth blades are very dangerous, and could cause a serious injury. Try to avoid using them.

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