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12

7. Fuel

RECOMMENDED MIXING RATIO
GASOLINE 50:OIL 1
(when using  ZENOAH genuine oil)

• Exhaust emission are controlled by the

fundamental engine parameters and
components(eq., carburation, ignition
timing and port timing) without
addition of any major hardware or the
introduction of an inert material during
combustion.

• These engines are certified to operate on

unleaded gasoline.

• Make sure to use gasoline with a

minimum octane number of 89 RON
(USA/Canada: 87AL)

• If you use a gasoline of a lower octane

value than prescribed, there is a danger
that the engine temperature may rise and
an engine problem such as piston seizing
may consequently occur. 

• Unleaded gasoline is recommended to

reduce the contamination of the air for the
sake of your health and the environment.

• Poor quality gasolines or oils may damage

sealing rings, fuel lines or fuel tank of the
engine.

HOW TO MIX FUEL

Pay attention to agitation.

1. Measure out the quantities of gasoline

and oil to be mixed.

2. Put some of the gasoline into a clean,

approved fuel container.

3. Pour in all of the oil and agitate well.
4. Pour In the rest of gasoline and agitate

IMPORTANT

• Gasoline is very flammable. Avoid

smoking or bringing any flame or
sparks near fuel. Make sure to stop the
engine and allow it cool before
refueling the unit. Select outdoor bare
ground for fueling and move at least
3m (10ft) away from the fueling point
before starting the engine. 

• The ZENOAH engines are lubricated by

oil specially formulated for air-cooled 2-
cycle gasoline engine use. If ZENOAH oil
is not available, use an anti-oxidant added
quality oil expressly labeled for air-cooled
2-cycle engine use. (JASO FC GRADE
OIL or ISO EGC GRADE)

• Do not use BIA or TCW (2-stroke water-

cooling type) mixed oil.

WARNING

50:1 MIXING CHART

GASOLINE     gal.

1

2

3

4

5

2-CYCLE OIL fl.oz 2.6

5.2

7.8 10.4

13

GASOLINE     liter

1

2

3

4

5

2-CYCLE OIL   ml

20

40

60

80

100

Summary of Contents for BT251

Page 1: ...e exhaust from this product contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm WARNING Before using our products please read this manual caref...

Page 2: ...t be followed in order to prevent accidents which could lead to serious bodily injury or death This mark indicates instructions which must be followed or it leads to mechanical failure breakdown or da...

Page 3: ...ank capacity 22 3 fl oz 0 62 Transmission Centrifugal clutch Rigid driveshaft Reduction ratio 1 000 Cutting head rotating direction Clockwise Operator view Durability period 50hrs Standard Accessories...

Page 4: ...owner s manual before operating machine 2 Wear head eye and ear protection 3 Wear foot protection 4 Wear gloves 5 Beware of thrown objects 6 Warning Attention 7 Keep all children bystanders and helpe...

Page 5: ...ou should wear proper clothing and protective equipment 1 Helmet 2 Ear protectors 3 Protection goggles or face protector 4 Thick work gloves 5 Non slip sole work boots 2 And you should carry with you...

Page 6: ...te the product properly and in a safe manner 2 When planning your work schedule allow plenty of time to rest Limit the amount of time over which the product is to be used continuously to somewhere aro...

Page 7: ...kage Make sure that the cutting attachment is properly installed and securely fastened 4 Be sure the debris guard is firmly attached in place 5 If the cutting head is the metal blade use the shoulder...

Page 8: ...rt than the width of your shoulders so that your weight is distributed evenly across both legs and always be sure to maintain a steady even posture while working 2 Keep cutting attachment below waist...

Page 9: ...y after stopping the engine 3 When replacing the cutting attachment or any other part or when replacing the oil or any lubricant always be sure to use only ZENOAH products or products which have been...

Page 10: ...eful look around to make sure that there are no sparks or open flames anywhere nearby before refueling 4 Wipe spilled fuel completely using a dry rag if any fuel spillage occurs during refueling 5 Aft...

Page 11: ...ebris guard on the bearing case attach it with the screw washer nut and support plate provided 1 Support plate INSTALLING CUTTING HEAD SE3 1 While locking the gear shaft by inserting the attached hexa...

Page 12: ...fuel tank of the engine HOW TO MIX FUEL Pay attention to agitation 1 Measure out the quantities of gasoline and oil to be mixed 2 Put some of the gasoline into a clean approved fuel container 3 Pour...

Page 13: ...R YOUR ENGINE LIFE AVOID 1 FUEL WITH NO OIL RAW GASOLINE It will cause severe damage to the internal engine parts very quickly 2 GASOHOL It can cause deterioration of rubber and or plastic parts and d...

Page 14: ...t firmly pull out the starter rope quickly until engine fires OP4 Avoid pulling the rope to its end or returning it by releasing the knob Such actions can cause starter failures 6 Move the choke lever...

Page 15: ...ing the idling speed LINE HEAD USAGE 1 Always wear eye protection such as safety goggles Never lean over the rotating cutting head Rocks or other debris could be thrown into eyes and face and cause se...

Page 16: ...weeds from wrapping around the head shaft Such materials can stall the head and cause the clutch to slip resulting in damage to the clutch system if repeated frequently ADJUSTING THE LINE LENGTH Your...

Page 17: ...e before inspecting the brushcutter for problems or performing maintenance Never alter the brushcutter or take the engine apart When replacing parts always be sure to use only ZENOAH products or produ...

Page 18: ...18 9 Maintenance 8 11 14 1 2 9 10 12 13 15 THIS SIDE UP THIS SIDE UP WIND LINE...

Page 19: ...and mis firing are often caused by a fouled spark plug Periodically clean the spark plug and check that the spark gap is in the correct range For a replacement plug use the correct type specified by Z...

Page 20: ...or grass covered unimproved land MA5 1 Spark arrester INTAKE AIR COOLING VENT Never touch the cylinder muffler or spark plugs with your bare hands immediately after stopping the engine The engine can...

Page 21: ...n turn may cause mechanical failure on the part of the brushcutter MA6 1 Cylinder fin 2 Intake air cooling vent back PROCEDURES TO BE PERFORMED AFTER EVERY 100 HOURS OF USE 1 Remove the muffler insert...

Page 22: ...with correct fuel carburetor adjustment screw out of normal range adjust to normal range muffler cylinder exhaust port carbon is built up wipe away air cleaner clogged with dust wash cylinder fin fan...

Page 23: ...PERIOD OF TIME UP TO THE FIRST SCHEDULED REPLACEMENT POINT FOR THE PART ANY REPLACEMENT PART THAT IS EQUIVALENT IN PERFORMANCE AND DURABILITY MAY BE USED IN NON WARRANTY MAINTENANCE OR REPAIRS AND SHA...

Page 24: ...ale To Purchaser When your unit requires any repair please bring or send it to the dealer with this sheet attached Product Model BT251 Equipment No Engine No ZENOAH Date ot Purchase D M Y Use Private...

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