ENGLISH
18
The break-in settings for the carburetor needles are:
• High-speed needle: 2 turns open
• Low-speed needle: 1 1/4 turns open
Use a tachometer to tune the engine based on RPM.
ENIGINE TUNING
WARNING:
Always adjust the carburetor from behind the propeller. Keep all loose items
away from the propeller at all times. Never reach over or around the propeller.
1. Start the engine.
2.
Move the throttle stick up until the engine is running at approximately 2,000 rpm.
3.
If you are using separate exhaust pipes, use a temperature gun to make sure hot exhaust is exiting all
engine cylinders. If you are using a collector ring, use a temperature gun to make sure all the cylinder
temperatures are similar and firing smoothly.
4.
Move the throttle stick up to full (open) throttle. If the engine runs rough or if some cylinders are not
operating, the fuel mixture is too rich.
5.
Lower the throttle stick until the engine reaches 2,000 rpm. Lean the high-speed needle (turn
clockwise) 1/16 turn.
6.
Quickly raise the throttle stick to full (open) throttle. If the engine stops running, the high-
speed needle setting is too lean.
7.
Lower the throttle stick until the engine reaches 2,000 rpm. Richen the high-speed needle
(turn counterclockwise) 1/8 turn.
8.
Repeat Steps 4–7 until the engine is running reliably at full (open) throttle.
STARTING THE ENGINE
Use a high quality gear oil to lubricate the outer parts of the valve train at the beginning of each
flying day.
1.
Fill the fuel tank with fuel.
2. Make sure the fuel lines are properly connected to the carburetor.
3.
Switch off ignition, turn the propeller with closed choke flap until the fuel reaches the carburetor
4.
Switch on ignition and holding the propeller firmly, turns the propeller 2-3 full times to suck
fuel into the engine.
5.
Now with firm flick, try and start the engine.
6. The engine start and stop
7.
Open the throttle (to release the choke)
8.
Engine run approx. at 1000 rpm for two minutes to warmup
