Rotax 912 Series Maintenance Manual page 81

2
X
3
fig. 7
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL
4
1
5
02725
- Gently turn each mixture screw (6) completely closed (clockwise)
and then reopen by 1,5 turns anti-clockwise.
- Hook - up the automatic full throttle spring (5), previously discon-
nected, back to its original position on the carburetor throttle actuat-
ing arm (1).
Carry out the above procedure on both carburetors.
You must at this point place the throttle lever in the cockpit on the idle
stop position. It is an advantage at this point to enlist the help of an
assistant to ensure that the throttle lever remains in this position during
the next steps of the synchronization process.
Ensure that the throttle lever in the cockpit remains on the idle stop position.
Return throttle arm (1) to the carburetor idle stop position and, using throttle
locking mechanism (4), secure the actuating throttle cable to the carburetor
throttle actuating arm (1) accordingly. You must ensure that the throttle arm
idle screw (2) is resting on the carburetor idle stop (3) and that there is no
clearance between the two when throttle cables are permanently installed
and the cockpit throttle lever is at the idle position.
Start the engine and verify the idle speed. If idle speed is too high or to
low adjust accordingly with idle speed adjustment (2).
Ensure that each screw is turned the same amount.
Inspect smooth running of engine. If necessary correct it with mixture
screw (6) . See Chapter 12-00-00, para 4.2.
CAUTION: An idle speed too low will result in gear box damage and
with an idle speed too high the engine is harder to start.
7
fig. 7/1
6
02726
12-00-00
page 19
Rev. 1, Jan. 01/2002