47
© REELY 01/08
4
P
REPARATION
C
HECK
CARBURETTOR
BASIC
SETTINGS
4.7
Fine tuning of idle speed and full throttle can only be carried out with
a well run in engine
The carburettor of Stadium Buggy “LEOPARD PRO 36” is
characterized by a material combination of a new type made of plastic and
metal.
The low thermal absorption of the synthetic material, compared to a carburettor
made of metal only, reduces the evaporation of the fuel
mixture already in the carburettor.
Thus, the fuel supply can be more precise, even with a hot engine and can be
regulated in a simpler way.
T
HROTTLE
STOP
SCREW
(
IDLE
SPEED
-
ADJUSTING
SCREW
)
The throttle stop screw is the
small
screw next to the idle speed-mix adjusting screw. It is already pre-adjusted;
a readjustment should not be necessary. The idle speed adjusting screw regulates the position of the slide carburettor
(the choke limit stop)
and therewith the carburettor outlet in idle speed.
We recommend a carburettor outlet of approximately 1 mm.
Turning the adjusting screw clockwise widens the outlet, turning it anticlockwise causes the
slide to retract further, which reduces the opening.
M
AIN
NOZZLE
NEEDLE
(
MIX
ADJUSTING
SCREW
)
The main nozzle needle is located above the fuel supply to the carburettor. It is adjusted for the first start of the engine
and
should not be modified yet.
The main nozzle needle regulates the air / fuel mix by full throttle.
Turn the screw clockwise in order to make the mix “leaner” (to reduce the pro-
portion of fuel) and turn it anticlockwise in order to make the mix “richer”.
In the
basic setting
for the first start, the main nozzle needle must be completely screwed in then unscrewed by two to three rotations.
I
DLE
SPEED
-
MIX
ADJUSTING
SCREW
The idle speed mix adjusting screw is the little screw on the side of carburettor linkage.
It is adjusted for the first start and
should not be modified yet.
The idle speed mix adjusting screw regulates the air /fuel mix in idle speed and in the transition interval to full throttle.
Turn the screw clockwise in order to make the mix “leaner” (to reduce the proportion of fuel) and anticlockwise, if the mix should be “richer”.
Depending on fuel, glow plug used and environmental conditions, small modifications in the settings might be necessary at a later time.
In order to reset the
factory setting
proceed as follows:
-
Open the slide carburettor completely
-
Keep the slide open and turn the idle speed mix adjusting screw clockwise as far as it will go.
-
Now unscrew it turning it by 7.5 rotations anticlockwise.
C
OMBUSTION
ENGINE
The engine of Stadium Buggy LEOPARD PRO 36 is equipped with an
ABC assembly
.
ABC
means “
A
luminum”, “
B
rass” and “
C
hrome”.
Aluminum with its relatively small thermal expansion and small weight serves as material for the piston. The
light piston allows high revolutions and quick load-cycle changes through the small mass inertia. The cylinder
is made of brass with chrome-plated contact surface and has a slightly conical shape which narrows upwards
(in the range from 1 – 2 micrometer). During operation, the upper part of the cylinder heats via the glow
plug and the combustion procedures; it expands, thus giving the cylinder sleeve its exact cylindrical shape
for the optimal tuning of the piston. In this way, piston rings are preserved, which reduces frictional loss to a
minimum and excludes leakages. These engines are manufactured according to high technical outlays with
precision machining. However, small manufacturing tolerances cannot be avoided, just as little as slight une-
venness and roughness of the material.
In addition, there are deformations due to thermal and mechanical stress.
Thus, when driving the new engine, a certain break-in time must be observed.
During the break-in time, engine parts tune to one another, whereby maximal capacity is reached and premature
wear is avoided.
Thus, the break-in procedure must be carried out with the highest accuracy!
S
TARTING
THE
ENGINE
4.8
Schiebevergaser (Abb. modellähnlich)
Throttle stop screw
Idle speed mix- adjus-
ting screw
Main nozzle
needle
Air suction opening
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