Horizon Hobby Evolution 152GX, User Manual

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5
Contents Included
Engine
Spark Plug 2 pcs (EVO30013309)
Electronic Ignition (EVO3314BB)
Exhaust Gasket (EVO30070407)
Plug wrench
Spark plug cable spiral wrap
Break in oil
Instruction sheet
Decal sheet
optional Items
Muffler (EVO30113410)
Gas Start Kit (EVO1002)
Evolution 2-cycle Synthetic Oil (EVOX1001Q)
Silencer system (EVO30114210E)
Evolution stand off all 116/152 (EVO3312)
Ignition battery 3-cell 2100mAh Li-Po (THP21003SPL)
Micro Digital Tachometer (HAN156)
Mounting the Engine
Most model airplane designs make provision for an engine mount. It
is extremely important that the engine mount be securely attached
to the airplane’s firewall and that the engine is securely attached to
the engine mount. Follow the instructions included with the airplane
for mounting the engine. The engine should be fastened in place to
the firewall with 4 screws. Use good quality 1/4-inch or 6mm screw,
blind nuts and lock washers. Position the throttle servo, lower than
the carburator, to allow for more linear movement of the throttle.
If you decide to fasten the engine using a flexible motor mount,
always choose parts with enough solidity and strength. Make sure
all screws are tightened and regularly check that they remain tight
and in good condition.
In most installations an engine standoff will be required. To install
the entire engine forward of the firewall, one minimum 3-inch
standoff is needed. We recommend the EVO3312 engine standoff
assembly (available separately).
Important: Air is necessary to cool the engine during operation. Make
sure that sufficient air circulation through the cowling is provided. As
a basic reference, the outlet area should be
3–5 times
the area of the
inlet area to provide adequate cooling.
Throttle Linkage
Carefully attach the throttle linkage to the engine using a ball link
on the carburetor. The throttle arm will accommodate a 4/40 ball
link. Make sure that the linkage is free to operate from low throttle
to high throttle and confirm that the low throttle setting on the
transmitter closes the carburetor butterfly to the low idle position.
Adjust the length of the pushrod until full throttle opens the throttle
fully, while low-throttle (low trim) completely closes the butterfly.
Choke Actuation
The choke lever is not drilled to accomodate a linkage from the
factory. If you plan to use a servo to activate the choke, the lever
will need to be drilled. Set this up in a manner similar to the throttle
linkage.
Attaching the Fuel Lines
Use large gasoline-compatible fuel line in the fuel tank as well as
the supply line to the engine. Use 3/16 brass/copper fuel tubing to
plumb the fuel tank. Be sure that the clunk inlet hole is of sufficient
size to work with this size of large fuel tubing.
Fuel for the Evolution Gas Engine
The Evolution gas engine has been designed to run on a mixture of
high-quality 91 octane unleaded gasoline and synthetic oil intended
for racing 2-stroke gasoline engines. For the break-in period of the
new engine, mix the fuel in a ratio of 30 parts gasoline to 1 part
lubricant. After break-in, use a ratio of 40 parts gasoline to 1 part
lubricant.
Spark Plug
The Evolution 152GX engine uses a CM-6 type of spark plug. Before
installing the spark plug you will need to set the spark plug gap to
the following dimension: .024 in to .028 in (.6mm to .7mm).
Selecting a Suitable Propeller
The Evolution
®
152GX has been designed to generate maximum
power at 5800–6300 rpm, according to the type of exhaust used. If
you wish to utilize the maximum power output, choose a propeller,
which will allow the engine to reach these revolutions, or slightly
lower revolutions. (The engine will unload in the air, depending on
the aircraft speed and propeller selected.)
Suggested Propeller Dimensions
We do not recommend using propellers that allow the engine to
reach more than 7500 rpm on the ground.
152GX
Two-blade
Three-blade
30x12 32x10 32x12 32.5x11 30x10
28.5x12 29x12