INSTALLATION
To successfully install the engine with water cooling system, we invite you to
observe this manual. It is a matter of your own and others' safety! In case of doubt
or uncertainty, please contact your nearest service SIMONINI center.
COOLING AND CARBURATION
For having a sufficient air flow in front and behind the radiator, do not place any
components or accessories near the radiator.
The radiating surface should be sized according to the power of your engine, the
using and the positioning of the radiator.
Normally, for the engine 48 HP, you use a radiator with radiant surface of 700 cm²
and 2L. of the total capacity of the cooling system. Ensure that the radiator is
exposed to the airflow in an optimal way.
For cooling, use a product with a corrosion inhibitor for light alloys, which is easily
finding at the car parts store. A protection for temperatures -15° can be enough.
The coolant temperature, leaving the head, at the maximum speed allowed under
full load, should not exceed 75°/80°C.
The optimal operating temperature is between 65° and 75°C. Before taking-off, wait
until the coolant has reached at least 50°C.
The temperature under spark plug (CHT), in the case of liquid-cooled engines,
should not exceed 120°C under full load.
The temperature of exhaust gas (EGT) at cruising speed, must not exceed
580°/600°C, at the maximum speed allowed should not exceed 600°C. Check the
reliability of the sensors and instruments!
In the case that the temperature of the exhaust gas (EGT) is lower than 20°C
compared to the recommended, you will have to decrease the main jet of 5
numbers at least (e.g. from 180 to 175), then double-check again the temperatures.
In the case that the temperature of the exhaust gas (EGT) is higher than 20°C
compared to the recommended above, you will have to work in the reversed way
(e.g. from 180 to 185) then double-check again the temperatures.
You can consider the temperatures as reliable when and if the engine reaches the
maximum speed allowed for the engine type and the propeller mounted.
