Rotax 912 ULS 3 Operator's Manual page 74

8.1) Engine preservation
General note
8.2) Engine back to operation
Effectivity: 912 Serie
OM Edition 2 / Rev. 0
WARNING WARNU
Due to the special material of the cylinder wall, there is no need
for extra protection against corrosion for the ROTAX aircraft engi-
nes. At extreme climatic conditions and for long out of service pe-
riods we recommends the following to protect the valve guides
against corrosion:
Step
1 Operate the engine until the temperatures have stabi-
lized for a period of 5 min (engine oil temperature bet-
ween 50 to 70 °C (122 to 160 °F).
2 Switch the engine OFF.
3 Allow the engine to cool down.
4 Change oil.
5 Remove the air intake filters and insert approx.
30 cm³ (1 fl oz) of corrosion inhibiting oil into the car-
buretor throat with the engine running at increased
idle speed. Shut off engine.
6 Drain carburetor float chamber.
7 Apply oil to all joints on carburetors.
8 Close all openings on the cold engine, such as ex-
haust end pipe, venting tube, air filter etc. against en-
try of dirt and humidity.
9 Spray all steel external engine parts with corrosion in-
hibiting oil.
If preservation (including oil change) took place within a year of
storage, oil renewal will not be necessary. For longer storage pe-
riods repeat preservation annually.
Step
1 Remove all plugs and caps.
2 Clean spark plugs with plastic brush and solvent.
3 Reinstall.
BRP-Powertrain
Risk of burnings and scalds!
Hot engine parts!
Always allow engine to cool down to ambient
temperature before start of any work.
Procedure
Procedure
page 8-2
April 01/2010