Rotax 277 - SECTION 5 BREAK-IN PROCEDURE; ENGINE BREAK-IN

SECTION
5
-5-
BREAK-
IN PROCEDURE
for aircraft
inst
al lation
(in
obher applicalrions
proceed
accordingly)
The
break-in has to be
performed
with the
engine installed,
properly
loaded.
In case of
an
aircrafb, anchor
the
plane
to
the
ground.
Run
the
engine
according to the
follolring
graph:
FUU
5
q
t
2
0
10
15
20
f0
10 6o
50
lt0
l0
20
111111
11
2
I
Be sure to
use a
safe
run-up
area, to anchor
aircraft at
those
points
approved by the
airfrane nanufaclrurer,
and to have
someone
present
lrho is
able to shut off
the engine instantty,
I
Attu. this
procedure
the
idle has to be adjusted. Then
short
take-offs
can be conducted. After
a few short full-load take-offs,
but
not later than 2 hours total
running time, the cyfinder
head
nuts
have to be
pe-torqued
to
19:2q Nm
(160
i
210 in.lb.).
For
this
prosedure
the cylinder cowl
(if
any) has to be taken off,
F.nriha h[<t ha.^ld f^F ra-t^r^,,ih' ^f har.l
Tools:
Screwdriver, insert 1l
(socket
l'rensh 1J),
torque wrench.
Note:
Use a cro6s sequence for tightening
the nuts.
Consider both heads as one unib
because they are
joined
by
exhaust
and rnanifolds.
Ensure that
cowl bolts are torqued less than head bolts.
IUnition
point
rubbing blocks
wear
rapidly
durjng
the first
hours
of operation lil1 they
I'potish
in'r on the cam
of crankshafi, therefore
bhe
poiots gap
may
require
adjustment after breal(-in
(betw.
8.10 hrs)
I
nufu" to ignition biming
procedure.
After
inibial break-in
adjust-
ment
1s
perforrned,
only
normal nainltenance
is required
(see
maintenalrce
scheduLe
)
.