12
4.6 Break-in
A phase of break-in executed with care, improves the duration and the performances of
the motor.
The motor must be uses with attention in the first 7 - 8 hours of the break-in (25 - 30
liters).
For the period of break-in, we indicate to move the screw High to a value of 1 turn+1/4
(rotation counterclockwise for 1/4 of turn) and to increase the quantity of oil in the fuel
up to the values pointed out by the chart 4.6.1. After 10 liters of break-in the screw High
could be closed with precision of 1/8 of turn, only if the motor doesn't have smooth or
regular disbursement, as suitable in the following paragraph. From our experience we
allow to say, this will be the only time when you will have to touch the screw High.
Whenever the carburation will have a variation, it will be enough to modfy the position of
the screw Low. In these period of break-in, thanks to your intervention on the screw H
and to the increase of oil in the fuel, the motor will enjoy of a good lubrication and of a
lower temperature in comparison to the norm. The performances of the motor won't be
optimal with these regulations, but you will get a good break-in and a guarantee of
duration for the organs of the motor. The first starting of the motor must be made to
the ground (on shoulder), warm up for some minutes and pay attention to anomalous
behaviors or noises. We recommend to conclude in one day the first two phases of the
break-in. Now follow the indications of the chart 4.6.2.
Chart 4.6.1
BREAK-IN
Vittorazi Easy100
Vittorazi Fly100evo
Screw H
1+1/4 of turn
1 +1/4 of turn
First liter
4.0% or 20:1
4.0% or 25:1
From 2 to 30 liters
3.5% or 25:1
3.0% or 33:1
Chart 4.6.2
First liter of fuel
The first phase is effected to the ground,
it will last around 15 minutes with a liter
of fuel. Alternate least, middle speed.
No max speed. Pass to the following
phase, not leaving cool the motor
completely.
From the second to the 10
th
liter of fuel
Effect flights or tests on the ground of
max 15 minutes.
Don't use the motor at the same speed
for long time, an gradual acceleration
and a release is preferable.
General check for bolts components.
From 10
th
to the 30
th
liter of fuel
If necessary close 1/8 of turn the scew
High. Always with caution also flights of
30 mins. Maintain the same percentage
of oil pointed out in chart 4.6.1. Repeat
the controls.
