2
www.RevEngines.com
Copyrights ©2010 Precision Aerobatics. All rights reserved
•
The ignition unit should be mounted away from excessi e heat and firmly held with cable ties or Velcro straps.
Be sure to use foam between the airframe and ignition box to pre ent ibration damage.
•
Do not let the shielded plug wires rub against sharp objects or edges as this could damage the wire and allow radio
noise out causing interference.
•
Make sure the spark plug cap is fitted properly and firmly to the spark plug before flying the model.
•
Isolate all ignition components as far as possible from all other electrical components.
•
Always perform radio range check before flying with the engine running.
Starting and operating
1. Fill the fuel tank and turn on ignition.
2. Close the choke and open the throttle to the full open position.
3. Quickly flip the propeller in the counterclockwise direction. When flipped se eral times, the engine will momentarily fire
and a popping sound of initial ignition is heard. We recommend using a leather glo e.
4. Open the choke and set the throttle at the idle position and flip the propeller. This should start the engine.
5. Let the motor warm up for a few seconds before ad ancing the throttle.
WARNING: THE ENGINE AY START ON ANY FLIP OF THE PROPELLEOR WHETHER IGNITION IS ON OR OFF!
Be sure to lower throttle to idle position once choke is removed to avoid hard kickback when starting.
Always have aircraft restrained adequately during this process.
Breaking in the engine
Be sure to use only high quality petroleum-based
oil (32:1 mix ratio) for break-in.
1. Use a 32:1 ratio Pennzoil or Lawnboy Ashless petroleum-based air cooled oil.
2. Start engine and allow it to idle (2000-2500rpm).
3. The engine will run rough during break-in.
4. Allow engine to run like this for 30 minutes refilling fuel if required.
5. After 30 minutes switch off engine and allow it to cool right down by itself.
6. Repeat until you ha e run 4-5 gallons of fuel through the engine. This assures success with your REV engine.
Carburetor adjustment
•
The needle farthest from the cylinder is the “high end” needle while the closest to the cylinder is the “low end” needle
(see the L and H letters engra ed on the carburetor). Winding the needle clockwise will lean the engine and anti clockwise
will richen the engine.
•
The setting will ary with altitude, temperature, humidity etc. A general starting point is 1.5 turns open on the low end
and 1.5-2 turns open on the high end.
•
Adjusting either needle may ha e some effect on the other, so some re-adjustment may be necessary when tuning.
•
Adjust high end needle at full throttle to peak RPM, then richen slightly to ensure engine is not running too lean in flight
which may cause the engine to quit in flight.
•
Adjust low end needle to achie e a smooth idle and reliable transition to high throttle.
•
Set the high end needle slightly rich during break-in period.
•
Further adjusting may be necessary once cowl is placed as this often changes air pressure around carburetor intake
aintenance
•Use 87-91 Octane unleaded gasoline/petrol mixed with high quality 2 stroke synthetic oil. We recommend the Amsoil Sabre
synthetic oil at a mix ratio of 50:1.
•Ne er use alcohol or similar based fuels.
•A oid running engine at low speeds for long periods as spark plug may become carbonized.
•Regularly check fuel tubing to make sure there are no leaks.
•The carburetor fuel screen should be cleaned periodically. Carefully remo e the pump co er, gasket and pump membrane.
The screen will be isible and can be cleaned after careful remo al.
•Use a fuel filter between your fuel container and the plane’s fuel tank while refueling. We also strongly recommend using a
high quality fuel filter between the plane’s tank and carburetor.
•Verify the balance of your propeller and check for any damage or chipped tip. Damaged propeller must be replaced!
