4) Jets; 5) Float Chamber - Rotax 912 Series Maintenance Manual

00358
fig. 041
fig. 042
3
1
4
8
7
5
6
2
fig. 044
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II

13.1.2.4) Jets

See fig. 041.
Remove float chamber. Remove main jet w, mixing tube e,
needle jet r, idle jet t, start jet y and mixture screw u. Clean
carburetor and jets with fuel. Carefully blow through all jets and
bores in the carburetor housing with compressed air and check
for free passage.
Check inner diameter of needle jet if oval, replace if necessary.
Check the size, see IPC.
CAUTION:

13.1.2.5) Float chamber

See fig. 042, 043, 044, and 045.
Remove and clean float chamber Q. Check both floats W for
free movement on the guide pin E. When the float is at its
lowest position it still must have clearance and must not stick
on the float chamber wall. Check if both distance pieces R are
in position.
NOTE:
00359
A float stuck causes the carburetor to flood. Check wear of
fig.043
guide sleeves T inserted in the float. Check the pins Y for float
00360
support U for wear due to excessive vibration. At noticeable
wear replace both floats and if necessary also the float suspen-
sion I.
00361
12
At all works on the carburetor proceed with
optimum cleanliness.
Distance pieces R were used to avoid the
stucking of the floats.With the new floats }
is no use for them.
page 38
Initial issue, Jan. 01/2002