Foxtech Halo-60 EFI User manual

Halo-60 EFI Engine
User Manual
V1.0 2022.6

Table of Contents
1 General Safety ................................................................ 2
2 Un-Packing Your Engine ................................................ 3
3 Engine Installation & Getting Started ............................ 7
3.1 Hardware Installation .............................................. 7
3.2 Throttle Setting ........................................................ 8
3.3 Engine Oil Mix ....................................................... 9
4 Maintenance ................................................................. 11
5 Technical Specification ................................................ 12
3.4 Starting the engine for the first time......................... 9
Halo-60 EFI Engine User Manual
@2022 FOXTECH All Rights Reserved 1

1General Safety:
Read and understand this Owner’s Manual before operating your engine. You can help to
prevent accidents by being familiar with the controls and observing safe operating
procedures.
Operator’s Responsibility:
1.1 The operator should know how to stop the engine quickly in case of any
Emergency.
1.2 A safety zone around the propeller should be established in which no person or
object is allowed to enter. Install a guard around the propeller when appropriate.
WARNING
1. Observe all safety precautions when working around the propeller.
2. Exhaust contains poisonous carbon monoxide, a colorless and odorless gas. Breathing
carbon monoxide can cause loss of consciousness and may lead to death.
3. Never run your engine in an enclosed space. Always allow for appropriate ventilation.
4. Observe precaution around the muffler. The exhaust system gets hot enough to ignite
Some materials.
5. Keep flammable materials away from the engine.
6. Petrol is extremely flammable and is explosive under certain conditions. Do not smoke
Or allow Flames or sparks where the engine is operating
Halo-60 EFI Engine User Manual
@2022 FOXTECH All Rights Reserved 2

2 Un-Packing Your Engine
Cautions：
Your Engine comes with wire harnesses attached to the intake assembly. Handle
the engine with care when removing the assembly from the box
Package List：
1. Engine with Intake Assembly
2. Engine (ECU)
3. Engine CDI
4. Fuel Pressure Regulator
5. Fuel Tubing
6. Main Wire Harness
7. Engine Assembly Hardware
8. Operation Manual
Halo-60 EFI Engine User Manual
@2022 FOXTECH All Rights Reserved 3

Components & Descriptions
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Halo-60 EFI Engine User Manual
@2022 FOXTECH All Rights Reserved 4


CDI Power In
Tach Output
心
Fuel Pressure Regulator
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Halo-60 EFI Engine User Manual
@2022 FOXTECH All Rights Reserved 5

Assembly Hardware
七“心 t,8er 令
Fuel Filter: between fuel
tank and fuel pressure
regulator
Fuel Inlet Pipe Fuel Outlet Pipe
Caution: Strictly connect the wires, wrong connection may cause engine damage.
Halo-60 EFI Engine User Manual
@2022 FOXTECH All Rights Reserved 6

3 Engine Installation & Getting Started
3.1Hardware Installation
1. Do not install the ECU, fuel pressure regulator and CDI to the engine or motor mount. The
vibration will damage the hardware. Route the ECU to a location inside the aircraft and
mount it where vibration is minimal. The ECU does not produce excessive heat and can be
encapsulated in foam to isolate it from vibration if needed.
2. Refer to the diagrams above and make sure wire harness of EFI are well designated &
Connected.
3. When the engine is mounted, make sure all the wiring harness are connected correctly &
the reliability for the connection. It is necessary to ensure the wiring harness does not rub
against the body part.
4. When the engine is installed, related shock absorption is required, and screw glue is used
to ensure reliable installation.
5. Connect the thin fuel line from the output port of the fuel pressure regulator to the oil inlet
of the throttle valve, push tubing past locking ring in blue to produce a proper seal and lock
it, in reverse push the locking ring to release the fuel line (do not fold or twist the fuel
line).
6. The fuel pressure regulator is installed close to the fuel tank. It is recommended not to be
higher than the fuel level, and ensure fuel inlet fuel line & fuel outlet fuel line be not bent
or folded; the thin fuel line connecting fuel pressure regulator & the engine should be kept
at least 30cm in length in order to reduce fuel pressure change.
7. Install the fuel filter between the fuel pressure regulator inlet and the fuel tank, ensure the
fuel line is connected properly in place; tighten the non-falling nut for fuel line.
8. Any 3 Cell Lipo or 4 Cell Lifepo4 or equivalent battery with a minimum of 2000 mAh
rating will run the engine for up to 2 continuous hours (5000 RPM/H). Halo-60 engine is
the latest version with CDI voltage from 4.8V-14V. Gaskets for Halo-60 engines (Since
September 2021) are in the latest material without air pollution restricted by some
countries.
Halo-60 EFI Engine User Manual
@2022 FOXTECH All Rights Reserved 7

3.2 Throttle Setting
1. Throttle commands use standard RC TX/RX or flight controller. The voltage of throttle
servo installed on the engine is 6V-7.4V by RX or Flight Controller Channel
2. Before starting the engine, adjusting the exponential rate of TX throttle curve or flight
controller to get the desired throttle response with throttle air valve, which affects the
engine performance
Full Throttle On Full Throttle Off
3. Our EFI system does not need extra Throttle Kill Switch, the engine will stop and
automatically the power for fuel pressure regulator is cut off when throttle air valve is
fully off.
4. For UAV project with the engine applied, providing power to the enable line of
ECU,when the signal of flameout is given, the enable line on an optional module (not
recommend) will stop the engine. For most flight controllers on the market, 10% rate for
idle RPM is set and will not stop the engine until turning off the button on the flight
controller. Suggest the user to set up the idle rate on your TX or flight controller for the
first time to operate the engine. Properly adjust and set up the throttle curve and rate to
avoid the damage of throttle servo by dead steering.
Halo-60 EFI Engine User Manual
@2022 FOXTECH All Rights Reserved 8

3.3 Engine Oil Mix
This engine was calibrated using 2 Stroke Racing oil at a mix ratio of 30:1 to 40:1. This oil
type and mix ratio should be maintained to ensure that the fuel injection system and engine
operates as designed.
Fuel Recommendations:
The engine was calibrated with standard 87 octane gasoline (in America), or standard petrol
91/95 in Australia, NEVER USE ETHANOL PETROL, recommended engine oil brand
MERCURY 2T，Red Line 2T，MOTUL 710/800 FD class
3.4 Starting the engine for the first time
1. Prime your system for the first time (or non-use for long time) by removing the fuel line
from the inlet of the throttle body
2. Cycle the battery power to the ECU in 5 second intervals until fuel is flowing from the
fuel line. Re-install the fuel line. You should not have to complete the priming process
again unless the engine fuel system is allowed to run dry or has been disconnected for any
reason
3. Manually hand rotate the propeller in few circles to make sure the hall sensor is working
in normal status (the sound “da.da”) with green LED light on & flashing in sync when the
engine is running in high speed, now next step starts after the fuel is in。
4. Verify that the throttle setting is at about 30%
5. The engine should be started using an external spinner, or using a built-in starting
alternator ( Be available on our One-Key Starter version soon). Flip starting as an
additional option but is not recommended due to possible injuries.
Note: The engine may struggle to run for the first few minutes as it is purging all the air
from the fuel system.
This may not be evident until you go to wide open throttle
6. Allow the engine to run for a few minutes to warm up the engine
7. Hold at wide open throttle for 15 seconds to verify that the air in the fuel system has been
purged. Reduce the engine speed to idle
Halo-60 EFI Engine User Manual
@2022 FOXTECH All Rights Reserved 9