O.S. Engines GF30 - Manual (Page 2)

Use a tank designed for gasoline. (Tanks designed
for glow fuel use a rubber cap which is deteriorated
by gasoline.)
A 230cc tank will provide 10~15 minutes flight.
(With full throttle, it will provide 7~8 minutes flight.)
Install a commercially available gasoline fuel filter
between fuel tank and carburetor. (Clean the filter
from time to time.)
For plumbing, use TYGON F-4040A tube (yellow
color) or O.S. fluolorubber tube (I.D. 3mm, O.D. 5mm,
500mm length: code no. 28382200). Replace tubing
periodically as it becomes hardened. (Replace tubing
inside the fuel tank every six months.)
FUEL TANK & LINES
Use fuel line keepers of stainless wire, etc. at the end
of the tubing to prevent the tubing from coming off.
This engine does not require a muffler pressurized
fuel system but be sure to provide an air vent.
Be sure to use a gasoline
resistant fuel tank cap.
Be sure to equip
air vent pipe.
Be sure to use fuel line keepers of
stainless wire, etc. to prevent tubing
from coming off.
Be sure to replace tubing
inside periodically.
To carburetor
fuel inlet
tubing for
re-fuelling
Consumption current is 400mA/6,000rpm/6V. Use a
power source of more than 1000mAh capacity.
The ignition module is set not to operate below
120rpm for safety.
The voltage of power source is 4.8~8.4V (rated).
(Ni-Cd, Ni-MH 4~6 cells, Li-Po, Li-Fe 2 cells)
IGNITION MODULE
Major specifications
Installation
Install the ignition module taking sufficient anti
vibration measures.
Install the ignition module at least 100mm away
from the engine and in a place where there is airflow
so that engine exhaust heat and radiation heat may
not affect its operation.
Do not share the power source with receiver and
use a separate power source.
Equip an ON/OFF switch between the ignition
module and its power source, and install it in a place
where can be operated from outside the model.
Install the ignition module and its power source as
far as possible away from the servos and receiver
power source.
Connect the sensor leads of the igniter module
(white, red black three parallel wires) to the sensor
leads from the engine.
Precautions
Do not disassemble the ignition module and plug
cap. (The ignition module is irreparable. Replace it
when necessary.)
Be careful not to mount the ignition module so that it
can be hit by water, gasoline or exhaust.
Avoid using the engine when the external
temperature is over 40 C.
Do not move the rpm sensor as it is placed at it's
optimum position, otherwise the engine will not run
properly.
Do not pull on the high tension cord to remove the
plug cap, or the wire will break. Be sure to hold the
plug cap to remove it. Be careful not to damage
your fingers while removing it.
Do not connect nor disconnect the rpm sensor with
the ignition module on, or there is a possibility it will
fire and the engine start.
Check the ignition module for spark when installing
the plug cap on the plug and be careful about
getting a shock. Make sure there is no flammable
material or gasoline vapors near by that could
ignite.
Do not turn the propeller with the ignition module
on, or there is a possibility the engine will start.
PROPELLER
The choice of propeller depends on the design and
weight of the aircraft and on the type of flying in which
you will be engaged. Determine the best size and type
after practical experimentation. As starting point, refer
to the props listed in the table shown below. Slightly
larger, or even slightly smaller props than those shown
in the table may be used, but remember that propeller
noise will increase if blade tip velocity is raised due to
high rpm or if a larger diameter/lower pitch prop is used.
Be well aware propeller rotating arc is very large due to
a large propeller used with this engine. Carry out
adjustments of the needle valve and mixture control
valve after stopping the engine. Do not allow your face
or hands to come close to the rotating prop.
Type Size (DxP)
Sport / Acro / Scale
Warning:
Make sure that the propeller is well balanced.
An unbalanced propeller and/or spinner can cause
serious vibration which may weaken parts of the
airframe or affect the safety of the radio-control
system. Do not use any propeller which has become
split, cracked or nicked even very slightly, or received
strong impact even if no apparent damage is visible.
PROPELLER & SPINNER ATTACHMENT
Be sure to install a fine in-line fuel filter between the tank
and carburetor to prevent foreign matter in the tank from
entering the carburetor. Clean the filter periodically.
1.
There is a risk, particularly with powerful four-stroke
engines, of the propeller flying off if the prop nut loosens
due to detonation ("knocking") in the combustion
chamber when the engine is operated too lean, or under
an excessively heavy load.
Obviously, this can be very hazardous. To eliminate such
dangers, the O.S. Safety Locknut Assembly was devised.
Install this as follows:
2.
Connect the battery leads of the ignition module
(red, black two parallel wires) to the power source.
Make sure the jackets of high tension cord do not
touch the engine and cowl to avoid accidental short
circuit.
Press the plug cap on the spark plug firmly fitting the
hexagon shaped plug cap to the hexagonal body of
the spark plug. The plug cap is snap-lock type. Turn
the plug cap 60 degrees clockwise to lock it over the
spark plug.
Install the propeller to the engine shaft, followed by
retaining washer and propeller nut and tighten
firmly with a 14mm wrench (not supplied).
Add the special tapered and slotted locknut and
secure with a 12mm wrench (not supplied) while
holding the propeller nut with the 14mm wrench.
Note:
Some spinners which are retained at the top of the
cone cannot be used with the propeller locknut
supplied with the engine. In this case, optional
locknut sets are available from O.S. – Propeller
Locknut Set for Spinner (Code No.45910200 4mm)
and (Code No.45913000 5mm).
CARBURETOR PARTS NAME
Regulator
Needle Valve
Mixture Control
Valve
Throttle Lever
Fuel Inlet
The Needle-Valve
For adjusting the mixture strength when the throttle is
fully open Needle-valve adjustment effect the mixture
strength at round mid speed.
The Mixture Control Valve
For adjusting the mixture strength at part-throttle and
idle speed, to obtain steady idling and smooth
acceleration to mid speed.
Two adjustable controls are provided on this
carburetor.
Please note with this carburetor, needle-valve
adjustment does not effect the mixture control valve
adjustment but the mixture control valve adjustment
effects the needle-valve adjustment. Therefore, it is
required to adjust also the needle-valve when the
mixture control valve is adjusted. Mixture control valve
is pre-set at nearly best position when the engine leaves
the factory. Therefore, it is not necessary to adjust the
mixture control valve until running-in is completed.
Roter Guide Screw
NEVER disassemble the fuel pump or pressure
regulator. Their original performance may not be
restored after reassembly.
DO NOT allow foreign matter to enter the fuel
system. Dirt inside the pump or regulator, no matter
how small, may obstruct the flow of fuel and prevent
these components from working properly.
CARE OF FUEL PUMP & REGULATOR
DO NOT obstruct the small rectangular hole at the
bottom of the regulator, nor the regulator will not
function correctly.
NEVER insert anything into the inlet or outlet nipples
in an attempt to clear a suspected obstruction.
ALWAYS use fuel filters. Keep the fuel tank
scrupulously clean and filter all fuel as it enters the
tank (e.g.via an O.S.'Super-Filter' Code No.72403050)
and use a good quality in-line filter between the tank
and pump. Remember to inspect filter screens at
regular intervals and rinse clean as necessary.
Rectangular hole
NEVER use kerosene, thinner or any organic solvent
for cleansing the pump. Rubber parts will be ruined
by these materials. Use only alcohol (methanol) or
gasoline.
THROTTLE LINKAGE
Before connecting the throttle to its servo, make sure
that the throttle arm and linkage safely clear any
adjacent part of the airframe structure, etc., as the
throttle is opened and closed. Connect the linkage so
that the throttle is fully closed when the transmitter
throttle stick and its trim lever are at their lowest
settings and fully open when the throttle stick is in its
fully-open position. Carefully align the appropriate holes
in the throttle arm and servo horn so that they move
symmetrically and smoothly through their full travel.
16Ч10-12, 17Ч8-10, 18Ч6W-8
Make a habit of always checking the tightness of
the propeller before starting the engine. Remember
that, especially with wooden propellers, there is a
tendency for the material to shrink, or for it to be
reduced by the serrated face of the drive hub.
Retighten the propeller nut if necessary after
loosening the Safety Propeller Locknut.
The locknut should be tightened firmly after
retightening the propeller nut.
NOTE:
FUEL
Use regular gasoline. (No need to use high octane
gasoline.)
Alcohol based glow fuel cannot be used in this
engine. Not only will the engine not work properly
but the internal carburetor plastic parts will be
damaged.
Use high quality commercially available 2 stroke
engine oil.
Follow the oil manufacturer’s recommendations
concerning the mixture ratio of gasoline and oil. If
there is no recommendation, mix with a 30:1 ratio.
We have checked and approved the following oil
mixture ratio. Zenoah genuine 2 stroke engine oil
(40:1) and KLOTZ ModelLube (50:1).
(This does not mean we guarantee the quality of
these oils.) Follow the instructions in the running-in
section concerning the mixture for running-in.
With a gasoline engine, passages in the carburetor
are narrower than that of a glow engine, and
therefore very sensitive against foreign matter such
as dust. It is suggested to use optional accessory
Super Filter L (Code No. 72403050) when filling a
tank in the model from a container used for
transportation or storing.
Nipple for PCV
(to be connected
to the PCV valve)
(to be connected to the
outlet of PD-08 pump)