RCGF 21CC-Twin Operator's Manual
  1. Manuals
  2. Brands
  3. RCGF Manuals
  4. Engine
  5. 21CC-Twin
  6. Operator's manual

RCGF 21CC-Twin Operator's Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
RCGF 21CC-Twin Operator's Manual
(note: the spare parts list and dimension of engine are in the end of manual)
RCGF 21cc twin
Parameter:
Type : 2 cycle piston valve type gasoline engine for airplane
Piston displacement Cylinder (cc) : 21cc
(1.83 cu in)
Bore x Stroke (mm): 1.08 in(27.6mm) x 0.67 in (17mm)
Carburetor : RCGF
Ignition : DC-CDI (Computer Controlled auto advance, electronic ignition system)
Power supply: 4.8-8.4V
Maximum Output :2.8HP /8500RPM
Requires: Gasoline, 2-cycle oil, ignition battery & propeller
speed rang : 1500-9500rpm
Gasoline-Version : Pre-mixed Fuel, 25-40 (Gasoline):1 , Recommend:30:1
(90% high otcane unleaded gasoline, Import gas into carbon fiber installations valves)
Lubrication Oil : 2 cycle engine oil
Propeller : 16X8 8100rpm (Standard Two leafs prop)
Suggested Propellers:
16X8,15X8
Suggested Break-in Prop: 16X8
Sparking plug:
1/4-32 SIZE
Cooling System : Air Cooled
RCGF engine package Includes: electronic CDI ignition, muffler, spark plug, gaskets,
bolts, throttle arm extension & manual.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 21CC-Twin and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for RCGF 21CC-Twin

Summary of Contents for RCGF 21CC-Twin

  • Page 1 Propeller : 16X8 8100rpm (Standard Two leafs prop) Suggested Propellers: 16X8,15X8 Suggested Break-in Prop: 16X8 Sparking plug: 1/4-32 SIZE Cooling System : Air Cooled RCGF engine package Includes: electronic CDI ignition, muffler, spark plug, gaskets, bolts, throttle arm extension & manual.

  • Page 2: Spare Parts List

    13.6 lb (6.2 kg) @ 328 ft (100 m) altitude 12.1 lb (5.5 kg) @ 5,900 ft (1800 m) altitude SPARE PARTS LIST (1) 1pc RCGF-21cc twin cylinder Gas Engine (2) 2pc RCGF Spark Plug 1/4-32 SIZE (3) 2pcs Mufflers with gasket and bolts (M4X20mm)

  • Page 3: Safety Tips And Warnings

    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.
  • Page 4 ● To avoid permanent damage to the electronic ignition system, never rotate the propeller on your RCGF engine with the electronic ignition system switched on and the plug not installed in the plug cap.

  • Page 5: Installation Instructions

    Installation Instructions Prepare the engine for installation Before beginning installation it’s a good idea to plan location of the various components of the engine. Many of the following steps may need to be completed in a different order than listed. 1.
  • Page 6 3. Connect the kill switch lead to the red connector from the ignition control module using the lead from the kill switch or with the included three pin connector with pig tail. Use one of the included three pin securing clips to secure the connection. 4.
  • Page 7 Installing the RCGF 21cc twin cylinder engine on Your Airplane Note: The RCGF 21CC twin must be installed on at least a 9.5 mm thick 5-phy plywood firewall.The firewall must be securely glued to the airplane. Use triangle stock and pin the firewall with hardwood dowels to reinforce the firewall glue joints.
  • Page 8 4. Install the throttle servo 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 least 12” [305mm] away from the engine. Be sure to use a non-metallic linkage.
  • Page 9 6. Connect the ignition wire from ignition module to the 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 exhaust holes in the cowl.
  • Page 10 Drill and Install the Propeller The easiest way to drill the propeller to fit the hub is to use a drill guide. If you do not have a drill guide, you can use the following method to drill your propeller. Most propellers within the recommended size range have a 0.393"...
  • Page 11 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 the compression stroke position. Use a Dead Center Hole Locator to center and start the hole.
  • Page 12 Be sure to use threadlocker. Adjustment of the Engine Each RCGF Engine has been factory preset. However, differences in elevation will influence the performance of the carburetor. To obtain optimum output of the engine, slight adjustment of the carburetor may be necessary...

  • Page 13: Idle Adjustment

    1. Choke Control (the choke control should be used when the engine is cold) 2. Throttle 3. Idle Adjustment Screw (adjust the idle speed) 4. (L) Low-speed Needle (adjusts the fuel/air mixture at low speeds) 5. (H) High-speed Needle (adjusts the fuel/air mixture at high speeds) Idle Adjustment Turning the Idle Adjustment Screw clockwise will increase the idle speed.
  • Page 14 (TDC). The ignition timing can be advanced or retarded by loosening the ignition sensor Phillips head screws and sliding the sensor to the full extent clockwise (32° advancing the ignition) or counter clockwise (26° retarding the ignition). Be sure to retighten the Phillips head screws after adjusting the ignition timing.

  • Page 15: Starting Procedures

    There are two recommended ways to start the RCGF 21cc twin: A. Manual Starting Note: When hand starting the RCGF 21cc twin, use a thick glove or heavy duty starter stick to protect your hand. 1. The propeller should be installed on the drive washer at the one o’clock position and at the beginning of the compression stroke so that it’s comfortable to flip it through...

  • Page 16: Engine Troubleshooting

    Engine Troubleshooting If your engine fails to start after the preceding starting procedures please check the following. Symptom Diagnosis Charge or Ignition battery replace battery voltage low Battery wires faulty Replace wires or Engine does not fire or loose Re-connect/check connections Replace spark plug Faulty spark plug...
  • Page 17 Many of the RCGF 8.4 V Ignition modules have an additional lead to plug into the Digital Tachometer. If your 6.V old ignition module does 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.
  • Page 18 Engine Maintenance Please clean the fuel filter in the RCGF Carburetor periodically. Failure 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...

  • Page 19: Warranty Information

    If you need carburetor spare parts please contact our service center on local. Warranty Information The RCGF-21cc twin has a two year limited warranty through RCGF service center beginning at the date of purchase. Please retain your receipt as your proof of purchase.
  • Page 20 Enigne Size Note: The total width will be 184mm with two spare plugs.
  • Page 21 Engine Spare parts list :...

Table of Contents