Rotax long term storage procedure

8.1) Engine preservation
General note
Due to the special material of the cylinder wall, there is no need
for extra protection against internal cylinder corrosion for the ROTAX
aircraft engines. At extreme climatic conditions and for long
out of service periods we recommend the following to protect the
valve guides against corrosion:
8.2) Engine back to operation
If preservation (including oil change) took place within a year of
storage, oil renewal will not be necessary. For longer storage periods
repeat preservation annually.
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Risk of burnings and scalds!
Hot engine parts!
Always allow engine to cool down to ambient
temperature before start of any work.
Step Procedure
1 Operate the engine until the temperatures have stabilized
for a period of 5 min (engine oil temperature between
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 carburetor
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 exhaust
end pipe, venting tube, air filter etc. against entry
of dirt and humidity.
9 Spray all steel external engine parts with corrosion inhibiting
oil.