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JC 23EVO II 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: 

 

 

3.5 hp at 9000rpm 

 

Idle Speed:   

 

        1300 rpm 

 

Maximum Speed:  

 

9000rpm 

 

Displacement: 

 

 

23 cc 

 

Bore and Stroke:   

 

33.5mm×27mm 

 

Weight:   Engine -     

  730g 

Exhaust – (pitts)      70g 
Ignition -     

  120g   

 

 

Propeller: 

 

 

 

15-10    to    18-8 

 

 

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  JC23EVO II, 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. 
 

Safety Instructions 

Summary of Contents for 23EVO II

Page 1: ... Volts typically 1200Mah Replacement Spark plug NGK CM 6 or equivalent Operating Instructions Thank you for purchasing our JC23EVO II 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 your...

Page 2: ... and keep spectators at a safe distance away when operating the motor Stop the motor before making any adjustments Always use the correct length propeller bolts not too long or too short Spinner cones must never touch the propeller maintain at least a 1mm clearance all around We recommend the use of an ignition kill switch to stop the motor as well as setting up the carburetor linkage so that the ...

Page 3: ... with any warranty service Mounting the Engine Whereas the threads in the engine stand offs and prop driver are perfectly adequate for the purpose they are easily damaged by excessive tightening or by cross threading Take care when starting the bolts to ensure that they engage the threads properly and make use of a suitable thread lock rather than applying excessive torque LOCTITE 242 Blue or an e...

Page 4: ...m cap head bolts are provided This allows up to 10mm for the firewall washers and spacers 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 threads penetrate the mounting pillars 8mm is better Longer or shorter bolts are available Ignition Module Mount the i...

Page 5: ...le 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 problems with the supplied plugs on any of the JC Engines despite many hours of operation Some experienced modelers recommend the use of NGK CM 6 these are available from your distributor Fuel and Oil ...

Page 6: ...d 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 the first two hours that is really only eight 15 minute flights Propellers Always check the prop bolts and inspect your prop and spinner before each flight The bolts should be checked for correct tightne...

Page 7: ...to check if it was flooded and to speed the drying out process Needle Adjustments The needle closest to the firewall H is the high speed needle the other one L is the low speed needle Turning the needles clockwise leans the fuel mixture reduces fuel flow and turning the needles counter clockwise richens the fuel mixture increases fuel flow just like a shower tap Settings will vary with altitude te...

Page 8: ...ht if it appears to sag off during full throttle flight maybe in a climb land without delay and richen anti clockwise the H needle1 8 turn If the engine burbles a bit in the mid range the L needle may need to be closed a bit Check again that the engine does not stumble when throttled up smartly lean on the L needle Trouble Shooting Motor won t start Flooding Over choking can cause flooding Clear a...

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