O.S. engine GT33 - MIXING of OIL -77 M

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E PROPELLER & SPINNER ATTACHMENT
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:
1.Ream the propeller shaft hole to 8.1mm bore with an
appropriate reamer, checking that the hole is exactly
centered.
P ssa be equal — sss
|
To be equal Ream to 8.1mm dia.
2. Install the prop to the engine shaft, followed by the retaining
washer and prop nut and tighten firmly with a 14mm
wrench. (not supplied).
3. Add the special tapered and slotted locknut and secure
with a 12mm wrench while holding the prop nut with the
14mm wrench. (not supplied).
OS. creme
16
Note:
Some spinners which are
retained at the top of the cone
cannot be used with the prop
locknut supplied with the AAA Y
engine. In this case, optional S MUS
locknut sets are available Propeller fib S
from O.S. — Propeller Locknut `
Set for Spinner (Code No.45910200 4mm) and (Code
No.45910300 5mm).
NOTE:
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.
Propeller washer
Since the GT33 is intended to be started with an electric
starter, the addition of a spinner assembly for centering the
starter sleeve is desirable. Special propeller locknut sets are
available for use with spinners. Use a good quality well
balanced spinner, enclosing the propeller boss. Make sure
that it is of precision-made and sturdy construction so that the
spinner shell cannot loosen when the starter is used.
Make sure the spinner notches do not interfere the propeller.
If they do, cut the notches to clear.
MIXING OF OIL
Gasoline is poisonous. Do not allow it to come
into contact with the eyes or mouth. Always store
it in a clearly marked container in a cool and dark
place out of the reach of children. There is a
possibility that it may damage your health.
AN
Gasoline is highly flammable. Keep it away from
an open flame, excessive heat, sources of
sparks, or anything else which might ignite it.
Do not smoke or allow anyone else to smoke
near to it.
Carry out mixing of gasoline and oil in a well-
ventilated and free of fire outdoor, place or there
is a possibility of fire.
Refill the models fuel tank only after the engine
has well cooled down, or there is a danger of fire.
Observe the laws and regulations in each country
and district concerning the usage, transportation
and storage of gasoline. Ask details at fire station
in each district.
> PP b
17
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 manufacturers 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.
KLOTZ ModelLube ® (50:1).
(This does not mean we guarantee the quality of this oil.)
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.