Operation At Low Ambient Temperatures - LIMBACH L 2000 EA Operating And Maintenance Manual

Removed engine:

Remove spark plugs and spray engine oil into the combustion chambers so that the upper part of the
cylinder barrel is wetted, too. Crank engine manually or with starter for a few turns. Spray spark
plugs with engine oil and install them again.

Wet all carburetor hinges with engine oil.

Close all openings to avoid entry of dirt or moisture.

Spray engine surface with engine oil. Take care of not exposing rubber parts and eletrical connectors
to engine oil.

8.22 Operation at low ambient Temperatures

In general, engine maintenance should be performed before the beginning of the cold season.
Furthermore, the following hints for operation at extremely low ambient temperatures should
be observed:
Fuel system
At temperatures between - 5 °C and + 20 °C, especially at high humidity conditions,
carburetor icing is possible. Under such weather conditions, monitor engine speed
continuously and switch on carburetor heating as necessary.
If there is no carburetor preheat installed we strongly recommened retrofitting one. Pleas contact
your aircraft manufacturer for information.
Electrical system
At low ambient temperatures, the capacity of the starting battery is reduced. This may
lead to starting problems.
Check all wiring connections in the ignition system and clean as necessary, oxidized
terminals cause voltage drops and thus starting problems.
Crankcase ventilation
At low ambient temperatures and high humidity, saponification of vent dome and
breather line is possible. Make sure by means of special inspections that this cannot
happen - a total lock might cause the engine oil to leak through the sealings due to
overpressure. This would lead to high oil losses and possibly to the destruction of the
engine.
Engine oil
For prolonged soaring (with stopped engine) please note that the viscosity of the engine
oil increases extremely with the cooling down of the engine. In extreme cases the
viscosity may have increased so much, that the starter cannot turn the engine anymore.
When planning your flight, consider prolonged soaring and fill engine with appropriate
oil. Eventually you should start the engine inbetween to warm up the engine oil again.
Edition: 01.03.2016
Operating Manual L 2000
Page: 38/48