Zenoah G300PUM Owner's Manual
OWNER'S MANUAL
114 06 37-26 (1808)
Model: G300PUM for radio control Boat
WARNING
• This engine is designed for radio controlled boat use.
• When replacing parts, use only parts which have been
certified by Zenoah.
• Zenoah assumes that no responsibility for this engine
that is modified or used for any other applications.
• Purchaser has all responsibilities against any laws
and regulations existing in the country, Zenoah is
exempt from such laws and regulations.
• Read and completely understand this OWNER'S
MANUAL before operating this engine.
2
1. Safety Precautions ............................3
2. Engine Assembling............................4
3.
Engine Mounting................................5
4.
Screw Propeller .................................6
5. Fuel....................................................7
6.
Starting ..............................................8
7. How to Stop The Engine....................8
8.
Carburetor Adjustment ......................9
9.
Engine Break-In.................................11
10.
Operation...........................................11
11.
Maintenance......................................12
12.
Special Tools.....................................17
13. Trouble Shooting ...............................18
14.
Parts List............................................20
15. Warranty.............................................23
Contents
The engine exhaust from this
product contains chemicals
known to the State of California to
cause cancer, birth defects or
other reproductive harm.
WARNING
AVERTISSEMENT ADVERTENCIA
Los gases de escape del motor de
este producto contienen
sustancias químicas conocidas
por el Estado de California como
causantes de cáncer,
malformaciones en recién nacidos
y otros problemas de
reproducción.
Les échappements du moteur de
ce produit contiennent des
produits chimiques connus par
l’Etat de Californie comme étant
responsables de cancers,
d’anomalies congénitales et
d’autres atteintes à l’appareil
reproducteur.
3
1. Safety Precautions
• This manual describes the engine. For its mounting and control, see the
instruction manual provided by model boat manufacturer.
• This engine is designed for model boat use. If it is used for any other
purpose, we cannot be responsible for its reliability, safety and any
laws/regulations in the country.
•Use genuine parts for replacement.
• Check the rotor and screw-propeller every time. If it is damaged, replace it
with a new one.
• If 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 rotor.
• Check the rotor. If it is damaged, replace it with a new one.
• When mixing the fuel, or operating the engine, carry it out in a wellventilated place.
• To prevent electrification, never touch the high-tension wire of the spark
plug during operation.
• The engine metal parts can burn your skin. Never touch the engine and
muffler during operation or right after stopping the engine.
4
The carburetor and air-funnel are not assembled at factory.
Make sure that the assembling for such parts are done according to the Fig.1.
Make sure that gasket and carburetor are mounted as described in fig.1.
The engine does not start if carburetor is mounted upside down position.
CAUTION
2. Engine Assembling
2
3
4
5
6
1
1. Engine
2. Gasket (T2075-13150)
3. Carburetor (580349001)
4. Air-funnel (848ES08300)
5. Spacer (1142-83110)
6. Screw (0263-30555)
Fig.1
G300PUM
5
3. Engine Mounting
Make sure that the engine is to be mounted according to the instruction manual
provided by model boat manufacturer.
In case such instruction manual is not available, make sure that the engine should
be mounted at least by 4 points both at engine's PTO side and recoil starter side.
[ Note ]
1) Be sure to set flat washers or metal plates on the reverse side of the
mount to prevent bolts from sinking into the mount.
Be sure to check if the bolts are securely fastened.
2) The fuel head between carburetor and the bottom of fuel tank must be less
than 100 mm (4 inches)
6
The exhaust system (e.g., muffler) is not equipped with this engine as standard.
When you select the exhaust system, check the engine speed (rpm) when the
maximum output is generated by using the exhaust system you are going to select.
And then decide the appropriate screw-propeller that would meet such engine
speed (rpm) that the exhaust system requires.
In general, standard size of the screw propeller (Surface prop type) are as follows:
Pitch ratio ( mm )
1.9 ~ 1.4
Diameter ( mm )
65 ~ 75
4. Screw-Propeller
7
• Mixed gasoline (octane over 90) and high grade 2 cycle engine oil (mixing use
type; JASO:FC grade or ISO: LEGC grade) at mixing ratio 25 : 1.
• The mixing ratio is according to the oil recommendation.
[ NOTE ]
1) Gasoline may contain maximum of 10% Ethanol (grain alcohol) or up to
15% MTBE (Methyl tertiary-butyl ether).
Gasoline containing Methanol (Wood Alcohol) is NOT approved.
2) Gasoline is very flammable. Avoid smoking, bringing any fires near fuel.
3) To prevent all possible problems on fueling system, make sure to use the
fuel filter which has more than 300 mesh or equivalent and gasoline proof
rubber pipe or equivalent.
Incorrect fuel filter use causes engine trouble like carburetor's fuel
passage stuffing or piston surface scratching etc.
5. Fuel
8
7. How to Stop The Engine
● How to start
a. Put fuel into the fuel tank.
b. While holding the equipment, pull out the starter rope swiftly.
c. In cold-starting, when the engine doesn't start. Partially choke the air-intake of
carburetor by finger to make engine fire.
6. Starting
For stopping the engine, the black lead wire from the coil should be grounded to
the engine body, or the throttle valve should be closed completely.
Red Lead
Black Lead
Kill Switch
Engine Body Earth
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