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.
Please remember that on the ground, the engine must turn up to 5800/5900 RPM,
otherwise while in cruise the maximum is 6100/6400 RPM.
Generally, each two-stroke engine varies the carburetion depending on the outside
temperature. So in summer time, you can use a standard main jet compared to the
altitude and latitude of your Area and your usual air field. The needle position has
influence on the carburetion at cruising speed. Normally it has to be fitted at the
2
nd
position from the top but it could be different due the EGT value.
FUEL SUPPLY SYSTEM
For the implementation of a power plant fuel to the carburetor, please follow the
below recommendations:
• put the fuel
membrane pump (MIKUNI) 3 or 4cm over the power vacuum on the
crankcase.
• The pump must be
fitted in horizontal way, with the vacuum fitting grip slightly
raked downwards. For a correct running, we suggest to fit the fuel pump by the
elastic supports.
• The length of vacuum hose of the pump sh
ould not exceed 10/15cm.
• The lowest point of suction in the fuel tank must not exceed 50cm difference in
height.
• For an optional gravity
functioning of the MIKUNI pneumatic fuel pump, the
maximum difference allowed is 70 cm.
• If you want to
fit an additional electrical fuel pump to the already present
pneumatic one, you will have to create a bypass, with an inserted
“no
-
return” valve
on the outlet electric pump. In the case with a double pump, check the attached
sheet.
• The maximum pressure rea
chable by the electric pump should not exceed 0.3 bar
(4.35 psi).
