Preservation Of An Engine Which Has Been In Operation; Returning The Engine To Service - Rotax MMH-912 Series Maintenance Manual

5.2)

Preservation of an engine which has been in operation

Due to the special coating of the cylinder wall, the ROTAX aircraft engine
normally needs no extra protection against corrosion.
■ ■ ■ ■ ■ CAUTION: Maximum storage period 12 months if the listed precautions are
– Oil change see latest issue Maintenance Manual (Line Maintenance) for the
respective engine type, 912 Series or 914 Series.
– On the ROTAX 912 Series: Run the engine to allow it to warm up, leave it
running at increased idle speed, remove the air filters and inject approx. 30
cm
3
– On the ROTAX 914 Series: Remove the top spark plugs from all four
cylinders and spray preservation oil into the cylinders through the spark plug
bores.
Turn the crankshaft several times.
Fit spark plugs and spark plug connectors.
– Drain carburetor float chambers.
– Apply engine oil to all linkages on carburetors.
– Close all openings on the cold engine, such as the exhaust pipe, venting tube
and air filter intake against entry of dirt and humidity.
– Spray all external engine steel parts with preservation oil.
– In the event of longer out of service periods repeat the whole preservation
procedure annually.
5.3)

Returning the engine to service

– Remove all plugs and fasteners.
– Clean spark plugs with solvent and a plastic brush.
– If preservation including oil change took place not longer than a year ago,
oil replacement will not be necessary.
– Complete 100 hour inspection if engine has been out of service for more than
one year.
▲ WARNING: Work on the engine may only be carried out and approved by
Effectivity 912/914 Series
Edition 1 / Rev. 3
BRP-Powertrain
Maintenance Manual
taken!
of preservation oil into the carburetors, shut down the engine.
authorized persons. See the latest issue Maintenance Manual
(Line Maintenance) for the respective engine type, 912 Series or
914 Series.
71-00-00
page 18
October 01/2010