Evolution Engines 52NX - Manual (Page 3)

Features
1. Fits common and popular helicopters on
the market
2. Excellent operating and power characteristics
3. Offers new technology to the helicopter market
Break-in
It is not necessary to mount this engine on a test
stand for break-in. However, the engine should be
adjusted slightly on the rich setting for the first few
flights to insure proper break-in. Always use a good
quality fuel which contains 15-30% nitro methane
and an oil content of 20-23% low viscosity oil.
Mounting the Engine
Most model helicopter kits include an engine mount.
Please refer to the helicopter manual for mounting
instructions and guidelines. It is extremely important
that the engine be securely mounted to the helicopter
and that the engine is securely mounted to the engine
mount. Follow the instructions included with the
helicopter kit for mounting the engine.
Important: Before each flying session, check that all
engine mounting screws are securely tightened.
Installing the Muffler
The muffler must be mounted after the helicopter
engine has been installed in the helicopter. Refer to
the installation of the tank and engine in the helicopter
manual for the proper sequence of installation steps.
Important: Be sure the lock washers for the muffler
mounting screws are placed over the screws. Securely
tighten both screws with moderate torque. It would be
wise to check the muffler mounting screws after each
run and prior to each flight as a part of your pre-flight
check of the helicopter.
Notes on Installation of Fuel Tank
1. The fuel lines should be connected to the fuel
tank as shown in the helicopter manual. Some
helicopters will use a “header” or holding tank
to help prevent foaming and provide for a more
stable motor run.
2. Since the tank is exposed to high pressures, be
sure all connections are secure and there is no
leakage.
3. Engines are sensitive to dirt in the fuel, so we
recommend a fuel filter be used. There are many
brands of filters so the modeler has a wide choice.
Always use the filter between the carburetor and
the line that goes to the fuel tank.
4. Adjustment of the carburetor and linkage will be
discussed later. Be sure to refer to the instructions
provided in the helicopter kit.

Engine Mounted in Helicopter
Fuel Line Installation