O.S. engine GF40U-FI User manual

2021.08.01

O.S. ENGINES MFG. CO., LTD.

4 stroke gasoline engine for UAV

GF40U-FI

With EC11 (ECU)

INSTRUCTION MANUAL

version 2.46E

6-15 3-Chome Imagawa Higashisumiyoshi-ku

Osaka 546-0003, Japan

TEL.+81-6-6702-0225

FAX.+81-6-6704-2722

http://www.os-engines.co.jp

・Recommended propellers are 18x6-12，19x6-10，20x6-8 (DxP Inch). We recommend a propeller whose

rpm is within range of 7500rpm～9000rpm at full throttle.

・Start the engine with a safety stick or an electric starter (recommendation for safety reason).

・Periodical inspection after 50, 100 hours are necessary. Follow the maintenance manual, which is

separately provided.

About the engine

・The engine is equipped with electronic fuel injection system to correspond to environmental changes

during a long flight.

・This is a four stroke gasoline engine, but runs on a premixed gasoline/2-stroke engine oil.

・Use high quality commercially available 2-stroke engine oil.

・Follow the oil manufacturer's recommedation concerning the mixture ratio of gasoline and oil. In case

of no recommendation by manufacturer, use a 30 : 1 gasoline-to-oil mixture.

・The engine runs counter-clockwise when viewed from the front.

*The specifications are subject to alteration for improvement without notice.

*Consult us for any questions on this product and return for repair.

Rocker cover

Cylinder head

Drive pulley

Drive hub

Propeller washer

Propeller nut

Lock nut

Crankshaft

Driven pulley

Intake manifold

Cylinder

Connector (Injector)

Intake air temperature sensor

Air inlet

Engine bracket

Mounting plate(R)

Mounting plate(F)

Crankcase

Crankshaft rotation sensor

Generator support (R)

OGR-100A Generator

Generator support (F)

Names of the parts

．

Injector

Throttle valve

Injector coupler

Manifold pressure sensor

Throttle servo

Throttle linkage rod

Spark plug (CM-6)

Cylinder head temperature sensor

F-6040 Silencer

Generator mount

Reinforcement beam

Engine mount

．

Names of the parts

．

Engine control unit (ECU)

ECU connector [CN1]

ECU connector [CN2]

Status display LED

Fuel pump unit

Fuel pressure sensor unit

Pressure release valve

．

Names of the parts

．

Accessories

【Igniter】 Model:IG-08A

・The red connector is a power connector. Supply DC6V～12.6V

(MAX1A) for operation. The ignitor requires a separate power

source from that of the ECU. Install a power switch outsidfe of a

fuselage between Ignitor and power source for safety.

・

Connect the black connector to Ignition signal cable of ECU

【Spark plug】

・Screw into the engine's cylinder head.

・NGK CM-6 Spark plug.

・the hexagon size is 14mm.

・Tightening torque is 12N・m

【Fuel filter】【Non-bubble weight】

・Inline fuel filter to be used between a fuel tank and a pump. The

arrow mark shows the direction of fuel flow.

・Non-bubble weight to be used in a fuel tank to avoid air bubbles

in fuel line.

【Hose clamp】

・To be used to fix pressurized tubes to joints.

・Recommended tube: EIGHTRON Flexible Fluorine (ETFE) Resin

Tubing Clear made by HAKKO CORPORATION / JAPAN

Code No.28382303 FLUORINE(ETFE) RESIN TUBING (2m)

　※

Be sure to use this tube where pressure is applied.

【Connector lock】

・For crankshaft rotation sensor，the power connector of Igniter，

and Ignition signal connector to prevent connectors from

disconnecting.

【Socket wrench (SST)】

・A special tool for attaching and detatching the temperature

sensors. (intake air temperature sensor and cylinder head

temperature sensor)

・Attach this tool to 1/4"(6.3mm) Socket wrench handle. (Socket

wrench handle is not included in this set)

【Serial signal converter】

・To be used to convert UART serial signal from ECU to RS-232C

serial signal when ECU is connected to a computer.

【Power supply code】

・Supply power.

・DC10V～17V(MAX1.5A)

Accessories

【CAN communication code】

・the connector for CAN communication

■

Cap screw (Hex socket head bolts)

※

Follow the above tightning torque unless otherwise specified.

Standard screw tightening torque

M5.0

7.2

screw size

・

M2.6

1.1

M3.0

1.5

M4.0

3.6

Installation

・Drill holes as shown above and bolt the engine to the firewall with standoff mounts and M5 bolts.

・Use standoff mounts with 18mm or more outer diameter made of A2017 aluminum or stronger

material.

・Use 25mm in length standoff mounts to be able to detatch the injector connector, to space the engine

from the fire wall.

・We recommend standoff mounts tobe within 25-30mm length.

Standoff mount

Firewall

Standoff mount

Threaded hole

Unthreaded hole

Threaded hole

Installation

・Attach Mounting plate(R) to the Standoff mounts with M5x20 cap screws.

・There are two types of Engine brackets: Engine bracket A and B are different in direction of Engine

support bolts. Choose the proper engine bracker (A or B) to use on the Mounting plate (R) as shown

below.

Engine support bolt

Mounting plate (R)

Mounting plate(R)

Engine bracket

Standoff mount

M5x20 Bolt

Engine bracket A

Engine bracket B

Engine bracket A

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