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AVIOMAC 125 TWIN (IDM)
FUEL
The engine works with a fuel-oil mixture
at a ratio of 4% (25:1). Example: 10 litres
of fuel and 0,4 litres of oil. Use always
fresh unleaded fuel and high-quality oil,
we recommend Shell Advance Racing oil.
Do not use old fuel or fuel that has been
stored for over 3 months.
CARBURETTOR SETTING
The carburettor has 2 needles for
carburation setting and one needle for
minimum setting. The needle marked with
a
L
enables low RPM, the needle marked
with a
H
enables high RPM, the needle
marked with
IDLE
serves to keep the
engine running at idle. Turning clockwise
L
and
H
needles will lean the mixture
(less fuel), turning counter clockwise the
needles will rich the mixture (more fuel).
We recommend to start with this setting:
close completely the
H
needle and turns it
out of 1 turn, close completely the
L
needle and turns it out of 1 turn and ½.
Do not try to adjust the needles with the
engine running because the propeller
could cause severe damage, so shut the
engine off before start setting the
carburation.
Gasoline carburettor are much sensitive
than GLOW carburettor, so they need
precise setting to allow the engine
working well. Avoid making more than 1/8
turn adjustment of carburation needles.
The third needle is the
IDLE
stop needle,
it serves for keep engine running at idle.
We suggest to screw it out to allow the
engine to be killed. The throttle has a
spring that allow it to return to idle. If you
want, you could release the spring to
avoid a constant load on the servo.
We recommend to maintain the spring on
its original position when you test the
engine on a work bench.
Never remove
the spring from the carburettor.
PROPELLER:
with Aviomac 125cc
engine we recommend propellers as
following: 28x10, 30x10, 32x10.
Propeller hub is designed to allow the
installation of 2 security screws. We
highly recommend installing these screw
to avoid dangerous falling of the
propeller.
