Remove the spark plug, exhaust side: if it is light brown color, the temperature is
about 600°C. If otherwise it is dark brown, the temperature is about 500°C. If
necessary, change the main jet till you get 520/540°C EGT value.
Repeat bringing the eng
ine at cruise range for 15/20” at 4800/5200 RPM (depending
on the installation). Read the EGT instrument and at the same time, turn off the
engine decelerating.
Remove the spark plug, exhaust side: surely the color will be lighter than the
previous check. Then increase the needle jet size up to get a EGT value at 520/540°C
(this is lower than the recommended as in flight there is an increase of about
20/30°C , due to the higher air flow to the carburetor).
We recommend to fit a GT Propeller, 2-blade, in wood, cm 159 or a 3-blade carbon
propeller, cm 150 made by Helix. Please remind that the RMP on ground should be
5800/5900 and while cruising 6100/6200.
LUBRICATION
To prepare the mixture of oil and gasoline, we recommend using a semi-synthetic
lubricant, which exceed the API TC, JASO FC, (for example, BARDAHL VBA SYNT).
The oil percentage to be used in our engines with liquid cooling, varies from the oil
type used:
3% if you use unleaded petrol (unleaded)
2% if you use leaded gasoline (premium gasoline).
To prepare it appropriately, we recommend to use clean tanks, put first the oil and
then enter the correct quantity of fuel in the tank.
Later, with the tank closed and holding it firmly in your hands, flip it over repeatedly
allowing good mixing of the oil and fuel.
TORQUE AND LIMIT
- Screw M12 Flywheel power: 70Nm.
- Screw M 8 Water pump casing: 22Nm.
- Screws M 8 Stator ignition and starter motor: 23Nm.
- Screw M10 Cylinder screw: 60Nm.
- Screw M 8 Head: 23Nm.
