background image

[ 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.

Hand flip start 

Since the engine 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 the engine 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. 

Because of the above conditions the propeller should be mounted to the hub as shown in
(Fig. 2) and quickly flipped within the range of about 180˚ from the horizontal position. 

[ NOTE ]

When the engine is mounted so the cylinder is kept horizontal, the propeller should be set at
a different angle of 90˚.

How to Start the Engine 

1. Fill the fuel tank with the fuel. 
2. Close the choke valve and open the throttle valve approximately 1/3 ~ 1/2 of the full open

position. 

3. Quickly flip the propeller in the counterclockwise direction according to the procedure

described above. When flipped several times, the sound (popping sound) of initial
explosion is heard. 

4. When the initial explosion is heard, open the choke valve, set the throttle valve at the idle

position or at the position slightly open from the idle position and flip the propeller a few
more times. Then, the engine starts.

5.  Operation

3

Magnet

Coil

A

Fig.1

B

Cut portion

Fig.2

The cut portions of propeller
mount and the propeller should
be set in the same direction. 

Summary of Contents for G620PU

Page 1: ...of the engine This engine is designed to be used to Radio controlled products In case any modification by customer ZENOAH shall not bear any responsibility from the damage caused by such modification...

Page 2: ...The mounting bolts should be screwed into the crankcase within 8 12 mm of depth 3 Since this engine is equipped with a float less carburetor with a diaphragm pump the direction of cylinder and positi...

Page 3: ...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 Beca...

Page 4: ...Turning this screw clockwise increases the idling R P M Turning it counterclockwise decreases the idling R P M Low Speed Needle This is the fuel adjust screw not the air screw Turning this needle clo...

Page 5: ...on the crankshaft by a hammer that can increase the runout of the shaft c Assembling crankcase 1 Apply grease on the oil seal lips and oil on the bearing 2 Assemble the crankshaft with a new gasket 3...

Page 6: ...2 1 Maximum Output 5 7 PS 9500rpm 4 9 PS 9500rpm with Muffler Operating engine speed 2000 10000rpm Weight 2 0kg 4 4Ibs 2 3kg 5 1Ibs with muffler Ignition system CDI type Flywheel magneto Carburetor W...

Page 7: ...ssy HDA 48D 1 44 Body assembly 1 45 3306 81380 Screen inlet 1 46 3350 81130 Cover pump 1 47 3350 81140 Cover diaphragm 1 48 2629 81150 Shaft assy throttle 1 Q ty unit Description Parts No Index No 49...

Page 8: ...ality material and production faults by repairing or replacing through distributor manufacture 2 Zenoah shall not compensate any other accompanied or benefit losses caused to user and distributor manu...

Reviews: