Evolution Engines 120NX - Manual (Page 4)

7 6
Attaching the Propeller and Spinner
Remove the prop nut and prop washer from the engine.
Install the spinner back plate. Install the propeller, the
prop washer and then the prop nut in that order (see
photo). Securely tighten the prop nut using a wrench.
Install the spinner cone.
Starting the Evolution Engine
Fuel
We recommend using high quality Cool Power, Omega
or Power Master fuels containing 10 to 15% Nitro. The
Evolution engine has been test run using these fuels.
If another brand of fuel is used, it may be necessary to
slightly adjust the needle valves to compensate for the
differences in fuel.
Glow Plug
The Evolution engine comes with a specially designed
“Super Plug” that prevents idle and transition flameouts.
The plug’s unique shape directs the incoming fuel/air
mixture away from the plug element. When replacing the
plug, be sure to replace it with another Evolution 2- or
4-cycle Super Plug (EVOGP1).
Starting the Engine
Step 1. Fill the tank with the above-mentioned 10 or
15% fuel.
Step 2. Reattach the fuel lines, making sure the vent
and clunk line are attached to the fuel nipple
and the muffler pressure nipple.
Caution: Do not attach the glow driver yet.
Step 3. The High Speed needle valve should be turned
open 2 to turns from closed for the initial first
start. (remember to follow the proper break-in
procedures for a ringed engine) see page 9
Step 4. With the throttle fully open, place your thumb
over the carburetor or the exhaust outlet of the
muffler and flip the prop clockwise through 6
complete revolutions, thus priming the engine.
Step 5. Close the throttle to the idle position and have a
helper hold your airplane.
Select a servo arm that has a hole located 11mm or
7/16" out from center and attach the other end of the
throttle linkage (see photos below).
With low throttle and mid-trim (idle position), the throttle
barrel should be open 1mm, giving a low rpm idle (see
photo above). Adjust the length of the pushrod until the
throttle barrel is exactly 1mm open. Check to be sure
the servo is moving in the correct direction. Full throttle
should open the throttle barrel fully, while low throttle
and low-trim should completely close the throttle barrel.
Reverse the servo throw if necessary.
Note: It may be necessary to slightly adjust
the length of the throttle pushrod to achieve
the correct mid-trim, low-stick idle position.
Attaching the Fuel Lines
Using medium silicone fuel tubing, attach the fuel tank’s
clunk line to the fuel nipple. This line will supply fuel to
the engine. Attach the vent line to the muffler pressure
nipple. This line pressurizes the fuel tank with the muffler
pressure, creating consistent fuel flow, regardless of the
airplane’s attitude.
Recommended propellers:
Break in*
15 x 6
Sport*
15 x 6, 15 x 7
15 x 8, 16 x 6
16 x 8
16 x 10
* 2-blade propellers
The Hangar 9 START KIT (HANSTART) includes everything needed,
except fuel and starter, to get the Evolution engine running.
At low throttle, mid-trim, the throttle barrel should be 1mm open.
1mm
1/2 throttle
Linkage 11mm out
Vent Line
Fuel Line
Fuel Line
Vent Line
Securely tighten the prop nut using a wrench.