RCGF 120CC-Twin Operator'S Manual Download Page 3

(3) 2pcs Mufflers with gasket and bolts

 

(5X16 mm) 

(4)  4pcs stand offs and 5X45mm bolts 

(5)  6pcs 5 x 45 mm bolts with Propeller Washers(propeller mounting) 

(6) 1pc Electronic Ignition Module with additional tachometer lead 

(7) 1pc drill jig tool   

(8) RCGF Decal 

 

Safety Tips and Warnings 

● This

 engine is not a toy. Please place your safety and the safety of others paramount 

while operating. RCGF will not be responsible for any safety issues or accidents involving 

this engine. 

● Operate the engine in a properly ventilated area.

 

●  Before

  starting the engine, please make sure all components  including the propeller 

and the engine mount are secure and  tight. It is strongly recommended that a good 

quality screw sealant is used during engine installation. 

●  During  the  break

-in period, it is recommended that the engine be  installed on the 

aircraft or a test stand with an appropriate shock absorber. Otherwise it is probable that 

vibration could rebound back to the engine and serious damages may occur during the 

break-in period. 

● For your safety 

and the safety of others, please do not stand in front or in line with the 

propeller when the engine is running. Keep  onlookers away from the running engine, 

especially small children. 

● Always use a balanced spinner and a balanced propeller. An

 unbalanced spinner and 

propeller combination will cause high  levels of vibration and may cause the propeller 

shaft to break. Always use a lightweight spinner on your engine. Lightweight spinners are 

considered to be those with a cone wall of 1mm or less. Heavy spinners could cause the 

propeller shaft to break.  Securely tighten the spinner and propeller on the engine to 

prevent it from being thrown off the engine while running. 

● Never use a propeller that has hit the ground. Even though it

 may look good from the 

outside, it may be cracked on the inside which may cause it to disintegrate while in use. 

Do not use a nicked, cracked or split propeller. 

● Keep foreign objects away from the propeller. Make sure that

 nothing can be “sucked in” 

by the propeller. 

● Never start

 the engine on loose gravel or sand. 

● Do not attempt to stop the engine by throwing anything into the

 path of the propeller. 

● Make sure the fuel line is well

-secured to the engine and to the fuel tank so that it won’t 

come off in flight. 

●  Do

  not use silicone fuel line because it will be dissolved by the  fuel. Use gasoline 

approved vinyl or neoprene rubber fuel line.  Always secure the fuel line away from the 

cylinder. The engine’s heat can damage the fuel line. 

● Never touch the engine immedia

tely after a run. The engine will be hot. 

● Before transporting your model, remove all the fuel from the

 fuel tank and fuel lines. 

● Always use high

-quality oil intended for 2-stroke (2-cycle) engines. It’s a good idea to 

Summary of Contents for 120CC-Twin

Page 1: ...mm Carburetor RCGF Ignition DC CDI Computer Controlled auto advance electronic ignition system Power supply 4 8 8 4V Maximum Output 12 5HP 7600rpm Requires Gasoline 2 cycle oil ignition battery propel...

Page 2: ...2XMuffler 7 05 oz 200g Ignition Module 5 11 oz 145 g Total Weight 6 45 lb 2925 g Technical Data Ignition Battery 4 8 8 4 NiCd or NiMH 6 6V LiFe or 2S LiPo pack Gasoline Oil Mix 30 1 Replacement Spark...

Page 3: ...unbalanced spinner and propeller combination will cause high levels of vibration and may cause the propeller shaft to break Always use a lightweight spinner on your engine Lightweight spinners are con...

Page 4: ...nes Metal filters intended for glow engine are too coarse and will not screen out finer particles Always filter your fuel by using an appropriate filter before putting it into the airplane s fuel tank...

Page 5: ...ponents of the engine Many of the following steps may need to be completed in a different order than listed 1 Check to see that all screws and bolts are tight Check carefully for any cracks broken or...

Page 6: ...ips to secure the connection 4 Connect the ignition module battery to the kill switch Any 4 8 8 4V 1000mAh and above capacity battery will work well for this Use heat shrink tubing to secure this conn...

Page 7: ...blind nuts not included into the back side non engine side of the firewall Install the engine to the firewall using 4 5x45mm SHCS with 5mm lock washers and flat washers not included with the included...

Page 8: ...at least 12 305mm away from the engine Make sure that you get the carburetor s full range of rotation with your servo travel Be sure to use a non metallic linkage 5 Install the choke servo optional at...

Page 9: ...e spark plug 7 Install the muffler onto the engine Be sure to use threadlocker and that the ignition wire does not contact the muffler 8 Cut all necessary clearance carburetor adjustment cooling and e...

Page 10: ...can use the following method to drill your propeller Most propellers within the recommended size range have a 0 393 10mm center hole pre drilled If your propeller has this predrilled hole move on to s...

Page 11: ...the ignition magnet with engine inverted 4 Place the propeller on the crankshaft at the one o clock position 5 Mark the location of one of the outer holes while the propeller is in the beginning of th...

Page 12: ...peller using the same technique as step 6 9 Mount the propeller to the engine using the 5x45mm SHCS with 5mm lock washers and flat washers Be sure to use threadlocker Adjustment of the Engine Each RCG...

Page 13: ...nter clockwise will richen the fuel air mixture at high speeds The default or factory setting of the High speed Needle is as follows turn the needle to the fully stop closed position and then open the...

Page 14: ...ot come up to full rpm at full throttle Solution The high speed needle valve H is too lean Open it up 1 8 of a turn and try again Problem If Your engine does not reach full rpm Or Carbon build ups app...

Page 15: ...sary see Adjustment of the Engine 9 If your engine does not start repeat steps 2 8 B Electric Starter Starting A 12 24V electric starter is recommended to start the RCGF120cc twin 1 Make sure you use...

Page 16: ...oving the spark plug from the cylinder and attaching the plug on the outside of the crankcase Have an assistant turn the engine over while checking this and be sure to have the spark plug firmly plugg...

Page 17: ...not have this additional lead the Digital Tachometer can still be used Simply use the Y harness included with the Digital Tachometer to connect to the pick up lead from the engine Be sure to secure a...

Page 18: ...ailure to do so may result in miss calibration of the needle adjustments In order to do this it is necessary to remove the Phillips head screw which secures the carburetor filter cover and the carbure...

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Page 20: ...ice center on local Warranty Information The RCGF 120cc TWINs has a two year limited warranty through RCGF service center beginning at the date of purchase Please retain your receipt as your proof of...

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