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JC 120EVO User Manual 

 

Model Airplane Engines 

 

SPECIFICATIONS: 

 

 

2 Stroke air cooled single cylinder, single ring. 

 

Walbro membrane pump carburetor with dual needles and manual choke 

 

Automatic advancing electronic ignition 

 

 

Output Power: 

 

 

12.5 hp at 8000rpm 

 

Idle Speed:   

 

        1100 rpm 

 

Maximum Speed:  

 

8000rpm 

 

Displacement: 

 

 

120 cc 

 

Bore and Stroke:   

 

45mm×38mm(Twin) 

 

Weight:   Engine -   

 

2620g 

Muffler-                104g x 2 
Ignition -   

 

176g   

 

 

Propeller: 

 

 

 

27-8    to    29-8 

 

 

Ignition Battery:   

 

4.8 to 6.0 Volts, typically 1200Mah 

 

Replacement Spark plug:          NGK CM-6 or equivalent 

 
         

Operating Instructions 

 
 

Thank  you  for  purchasing  our  JC120EVO,  we  hope  it  will  bring  you  many 

hours  of  enjoyment.    It  is  important  to  familiarize  yourself  with  these  safety 
precautions,  as  well  as  the  operating  instructions  -  these  engines  can  cause 
serious injury to people and animals.    This  will help you avoid injury or harm 
to yourself, other persons or animals. 

 

JC ENGINE POWER CO.,LTD

 will not be held responsible for any loss, injury or 

damage resulting from inappropriate use of its products  - you are responsible for the 
safe operation of your equipment. 
 
 
 

Summary of Contents for 120EVO

Page 1: ...4 8 to 6 0 Volts typically 1200Mah Replacement Spark plug NGK CM 6 or equivalent Operating Instructions Thank you for purchasing our JC120EVO we hope it will bring you many hours of enjoyment It is i...

Page 2: ...e propeller arc not in front or to the side of the propeller and keep spectators at a safe distance away when operating the motor Stop the motor before making any adjustments Always use the correct le...

Page 3: ...nty does not cover damage resulting from a mishap or damage caused by incorrect operation of the product in terms of the operating instructions or shipping costs associated with any warranty service M...

Page 4: ...rs Please ensure that these bolts do NOT bottom out in the mounting pillars the bolts will not be holding the engine securely and the threads may be damaged Ensure that at least 6 mm of the bolt threa...

Page 5: ...e between the ignition and components and the receiver and components Spark Plug JC Engines are supplied Rcexl CM 6 spark plugs We have seen plugs of low quality on other engines but we have had no pr...

Page 6: ...good performance and a substantially longer life We don t believe in lengthy bench running and would far rather see the engine flying at varying throttle settings but not subjected to hard flying for...

Page 7: ...or removing it from the carb and flipping with the choke closed until it fires and runs Let it run dry then start again The spark plug can also be removed and dried to check if it was flooded and to...

Page 8: ...dle for just on peak then back to the L needle for a steady idle Set the mechanical idle stop for a reliable idle 1 300 1 500 rpm Listen to the engine during flight if it appears to sag off during ful...

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