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MAINTENANCE SCHEDULE   
 

                   

   

TECHNICAL SPECIFICATIONS 

 
 

MODEL   MITOX 251C 

Type   

Air cooled 2-stroke petrol engine 

Model  

IE34F-2E 

Displacement : ( cm

3

)  

25.4 cc 

Max. output 

0.7 (kw) in accordance with    ISO 8893 

Idle speed: rpm (min 

–1

2800

±

150 

Max. power speed: rpm (min 

–1

) 9800 

Fuel tank capacity 

0.65L 

Fuel   

Mixture (petrol 40 : Oil 1) 

Carburetor  

Diaphragm type 

 
Engine 

Spark Plug   

Torch L8RTC or NGK-R BPMR7A   
or equivalent 

Transmission   

Centrifugal clutch, spur gear, cam-crank 

Dry Weight w/o petrol 

5.1 kg

 

Overall size (LxWxH)   

1660mmx285mmx250mm 

 

Cutting width: 

337mm 

Cutting line diameter 

2.0mm 

Max. rotation speed: 

8500 rpm (min 

–1

)  

 

Above specifications are subject to change without notice. 

 

 

Component 

 
Procedure 

 

Before

use 

 
      Every 15

  Hours  

 

Every 25

Hours  

 

Every 50 

Hours  

 

 

Note 

 
Fuel leaks / spillage 

 
Wipe up 
 

 

 

 

 

 
 

 
Fuel tank, filter 

 
Inspect / clean 

 

 

 

 

 
Replace if necessary 

 
Idle adjust screw 

 
See above 

 

 

 

 

 
Adjust carburettor if 

necessary 

 
Spark plug BPMR7A 

 
Clean and readjust 
plug gap 

 

 

 

 

 
GAP .025” (0.6-0.7mm)
Replace, if necessary 

 
Cylinder fins, Intake air 
cooling vent 

 
Clean 

 

 

 

 

 

 
Muffler, Spark arrestor, 
cylinder exhaust port 

 
Clean 

 

 

 
 

 

 

 
Throttle lever, ignition 
switch 
 

 
Check operation 

 

 

 

 

 

 

 
Air filter 
 

 
Clean 

 

 

 

 

 

 
Screws, nuts, bolts 
 

 
Tighten / replace 

 

 

 

 
 

 
Not adjustment 

screws 

Summary of Contents for 251C PETROL GRASS TRIMMER

Page 1: ...R S MANUAL PETROL GRASS TRIMMER 251C USER MANUAL MAINTENANCE INSTRUCTIONS AND SPARE PARTS READ THIS MANUAL CAREFULLY BEFORE OPERATING THE MACHINE WARNING THIS SYMBOL INDICATES IMPORTANT SAFETY PRECAUT...

Page 2: ...5 DRIVE SHAFT ASSEMBLY CONTAINS A FLEXIBLE DRIVE SHAFT 6 IGNITION SWITCH ON AND OFF SWITCH 7 SAFETY LEVER TO PREVENT ACCIDENTAL OPERATION OF THE THROTTLE 8 THROTTLE TRIGGER SPRING LOADED TO RETURN TO...

Page 3: ...IMMER 6 BEFORE STARTING THE ENGINE 6 AVOID NOISE PROBLEMS 6 ASSEMBLY OF THE GRASS TRIMMER 7 INSTALLATION OF THE GUARD 7 INSTALLATION OF THE NYLON HEAD 7 FITTING OF THE HANDLE 8 USING THE GRASS TRIMMER...

Page 4: ...r security shoes and gloves Beware Keep hands and feet away from moving parts Always keep a safe distance from the cutting parts Hot surface Risk of burn Danger Risk of intoxication Danger Risk of fir...

Page 5: ...nal label WARNINGS IN THE MANUAL This mark indicates instructions which must be followed in order to prevent accidents which could lead to serious bodily injury or death This mark indicates instructio...

Page 6: ...er Never allow children or anyone unable to fully understand the directions given in this manual to use this grass trimmer When planning your work schedule allow plenty of time to perform the work and...

Page 7: ...enter while the grass trimmer is being used and when necessary this area should be marked with a warning rope warning signs or other forms of warning When work is to be performed simultaneously by tw...

Page 8: ...g point Fig 2 and secure using plate B and 2 screws Fig 4 The blade fitted to the guard is sharp and can cause injury always wear gloves INSTALLATION OF THE NYLON HEAD Hold the dust cover Fig 5 with a...

Page 9: ...the cutting head Always wear gloves for this operation and ensure the engine is switched off and the head is stationary This machine is fitted with a Tap to Go head To release more line tap the bump...

Page 10: ...igh performance two stroke engines Mix in a ratio of 40 parts petrol to 1 part of oil By using two stroke oil specially made for two stroke engines you will reduce the formation of ash and carbon depo...

Page 11: ...cord is extended this can damage the starter mechanism COLD ENGINE STARTING Rest the unit on a flat firm surface Keep the cutting head off the ground and clear of surrounding objects as it may start...

Page 12: ...the recoil starter several times without the spark plug in place and with choke in the open position This will help clean and ventilate the combustion chamber STOPPING THE ENGINE Set the engine to id...

Page 13: ...cover by undoing the cover screw Fig 15 clean the filter element in warm soapy water dry completely before installing If the element is broken or shrunk replace with a new one FIG 15 AIR FILTER COVER...

Page 14: ...earest service agent for repairs before using the machine STORAGE Remove the spark plug pour a small amount of oil into the cylinder Rotate the crankshaft several times using the starting rope in orde...

Page 15: ...es provided on the bobbin Fig 20 Wind the line anti clockwise in this channel maintaining an even firm tension onto the bobbin Repeat the above step using the other channel After winding the cord inse...

Page 16: ...0mmx285mmx250mm Cutting width 337mm Cutting line diameter 2 0mm Max rotation speed 8500 rpm min 1 Above specifications are subject to change without notice Component Procedure Before use Every 15 Hour...

Page 17: ...rts that are subject to wear e g safety parts blades blade supports bearings cables guards deflectors spark plugs air filters etc Neither does warranty extend to Freight and packing costs Use of non g...

Page 18: ...A dichiara sotto la sua propria responsabilit che i seguenti decespugliatori con motore termico a scoppio Shanghai City Mr KEJUN LIU PRESIDENT 25 Sep 2010 The undersigned Je soussign Il sottoscritto E...

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