Evolution Engines EVOE33GX - Manual (Page 12)

EN
12
The break-in settings for the carburetor
needles are:
• High-speed needle: 1.5 turns open
• Low-speed needle: 1.5 turns open
Use a tachometer (HAN111, HAN156, or
telemetry) to tune the engine based on RPM.
To lean the high- or low-end fuel mixture, turn
the high- or low-speed needle clockwise. To
enrich the high- or low-end fuel mixture, turn
the high- or low-speed needle counterclock-
wise. It is best to make all the carb adjust-
ments with the engine turned off.
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. Move the throttle stick up to full (open)
throttle. If the engine runs rough, the fuel
mixture is too rich. If the engine stops run-
ning, it is too lean.
4. With the engine shut down, either enrich
or lean (as indicated by the test in Step 3)
the high-speed needle screw by 1/16th of a
turn and restart the engine. Turn the high-
speed needle clockwise 1/16 turn to lean
the high-end fuel mixture.
5. Repeat Steps 3–4 until the engine is
running reliably at full (open) throttle.
Engine Tuning
Until the engine is broken in, use an electric
starter to start the engine. Once it is fully
broken in it can be started by hand, but it is
easier and safer to start the engine with an
electric starter.
1. Turn on the ignition.
2. Close the choke valve.
3. If Using an Electric Starter
a. Rotate the propeller in a backwards
direction against compression.
b. Push the start firmly against the nose
cone and engage. The engine should fire
relatively quickly, within 1-2 seconds.
c. Turn off the choke and engage the starter
as before until the engine starts.
If Using a Starting Stick or Flipping by Hand
a. Rotate the propeller counter-clockwise
until against compression.
b. Flip the propeller through compression
until it fires.
c. Turn off the choke.
d. Flip the engine through compression as
before until it starts.
4. Let the engine run at mid-throttle for 45
seconds to stabilize the temperatures.
a. If the engine doesn’t start quickly, disen-
gage the starter. Continuously running
the starter can flood the engine.
b. Check to make that fuel is moving
through the carburetor system.
c. If the engine appears not to have any
fuel, repeat the priming procedure
above.
d. Repeat 1–4 of Starting and Running the
Engine.
Starting and Running the Engine