Zenoah G230PU, G230PUH, G230PUM Owner's Manual

OWNER'S MANUAL

MODEL : G230PU - for Airplane

G230PUH - for Helicopter
G230PUM - for Boat

G230PU

G230PUH

G230PUM

April 2002

1155-93110(204)

• Do not modify any parts of the engine.

• This engine is designed to be used to Radio
controlled products.

• In case any modification by customer, KOMATSU
ZENOAH shall not bear any responsibility from
the damage caused by such modification.

• Keep ignition system well maintained.

WARNING

1.Propeller for airplane

The recommended prop sizes are as shown in the table bellow.

This engine with a standard muffler produces the maximum
output when the engine is running at about 10,000rpm. Be sure
to use a propeller which makes the engine speed
approximately 7,000~9,500rpm while the airplane is flying.

[ NOTE ]

When mounting the spinner, set a pin on the hub with more
than 3mm of diameter, thus preventing slipping.

2. Rotor for helicopter

Adjust the rotor-pitch to obtain 9,000~10,000 rpm of the engine
at full throttle operation.

3. Screw Propeller for boat

The exhaust system (e.g., muffler) is not equipped with as
standard. When you select the exhaust system for the engine,
check how many the engine speed (rpm) is required when the
maximum output is generated by using the muffler you select.
And then decide the appropriate the screw propeller that would
meet such engine speed (rpm) that the muffler required.
In general, standard size of the screw propeller (Surface prop
type) are as follows:

1. SAFETY PRECAUTIONS

2. MOUNTING G230PU

3. PROPELLER, ROTOR & SCREW PROPELLER

4. FUEL

5. OPERATION

Make sure that the G230PU is mounted on the aircraft grade
plywood with more than 6mm of thickness or a mount of
equivalent strength and is firmly fixed with 4 bolts.

[ NOTE ]

1.Be sure to set flat washers or metal plate on the reverse side of
the mount to prevent bolts from sinking into the mount. Before
be sure to check for loose bolts.

2.Since the engine is equipped with a float-less carburetor with a
diaphragm pump, the direction of cylinder and position of fuel
tank can be freely selected .

Hand flip start

Since the G230PU is equipped with the ultra compact C.D.I. type
flywheel magneto ignition system, it should be started according
to the following procedure;

✽ The magneto system of G230PU is designed in such a way

that when the exhaust port is closed by the piston, that is, when
the compression stroke starts (Refer to Fig. 1-A), sparks are
never produced on spark plug no matter how fast the propeller
may be flipped. Be sure to quickly flip the propeller when the
edge of magnet on the rotor is approaching the coil (Fig. 1-B).
It means that the propeller should be quickly flipped about 90
degrees in crank angle before the compression is about to
start.

How to Start the Engine

1.For Airplane
a.FiII the fuel tank with the fuel.
b.Choke the engine and turn the propeller a few times until the

fuel appears at the carburetor.

c. Set the throttle valve at the idle position or at the position

slightly open from the idle position. Quickly flip the propeller
in the counterclockwise direction according to the procedure
described above. Flip the propeller a few times. Then the
engine starts.

2.For Helicopter & Boat
a.Fill the fuel tank with the fuel.
b.Push the priming bulb upper the carburetor until fuel appears

in the priming bulb.(for Helicopter)

c. Choke the engine and open the throttle valve approximately

1/3~1/2 of the full open position.

d. Quickly pull the starter cord when the initial explosion is

heard.

e. When the initial explosion is heard, open the choke, set the

throttle valve at the idle position or at the position slightly
open from the idle position and quickly pull the starter cord a
few more times. Then the engine starts.

[ NOTE ]

• Be sure to open the choke when the initial explosion is heard.

• When the choke is opened, be sure to close the throttle valve

3. If the rubber joint is placed between the engine and the body
for anti-vibration, check if the rubber is too week and select the
proper hardness of the rubber, in order to avoid the unexpected
vibration under operating engine RPM zone.

Note carefully that if the engine is vibrated at idling, then the

idling RPM is likely to get unstable due to overflow at
carburetor by the vibration.

4. Coat the bolts for muffler with anti-looser (e.g., Locktite or
equivalent).when assembling.

• This manual describes the engine. For its mounting and
control, see the instruction manual for the model airplane,
helicopter and boat.

• Each engine is designed for use on each model airplane,
helicopter and boat. If it is used for any other purpose, we
cannot be responsible for its reliability or safety.

• Use genuine parts for replacement.

• Check the propeller, rotor and screw propeller every time.
If it is damaged, replace it with a new one.

• If the propeller (or the rotor or the screw propeller) hit
something while the engine is in operation, immediately
stop the engine and check it.

• Start the engine on a flat surface without pebble stones.

• Never modify the fIywheeI.

• Check the fIywheel. If it is damaged, replace it with a new
one.

• When mixing the fuel, or operating the engine, carry it out
in a well-ventilated place.

Magnet

Coil

Fig.1-A

Fig.1-B

Diameter × Pitch ( in.)

18 × 6, 16 × 8 ~ 10

Diameter ( mm )

65 ~ 75

Pich ratio ( mm )

1.9 ~ 1.4

Mix gasoline and 2-stroke oil at a mixing ratio of 25 ~ 40 :1.

[ NOTE ]

1.Be sure to use a gasoline-resistant fuel piping. (Do not use any silicon rubber tube).

2.Never use any alcohol fuel or alcohol added fuel, or the rubber part in the carburetor will be damaged.