7) Cruising; 8) Engine Shut-Off; 9) Cold Weather Operation - Rotax 912 UL Operator's Manual

10.3.7) Cruising

Set performance as per performance specifications and respect
operating limits as per Chapter 10.1), 10.1.1) and 10.1.2).
Avoid operation below normal operation oil temperature (90 ÷110 °C
/ 194 ÷ 230 °F), as possible formation of condensation water in the
lubrication system badly influences the oil quality.
To evaporate possibly accumulated condensation water, at least
once a day 100 °C (212 °F) oil temperature must be reached.

10.3.8) Engine shut-off

Normally the cooling down of the engine during descending and
taxiing will be sufficient to allow the engine to be shut off as soon as
the aircraft is stopped.
At increased operating temperatures to make an engine cooling run
of at minimum 2 minutes.

10.3.9) Cold weather operation

Generally, an engine service should be carried out before the start of
the cold season.
Coolant:
For selection of coolant and mixing ratio, see "Coolant", Chapter
10.2.1).
Lubricant:
For selection of oil, see Table of Lubricants (Chapter 10.2.3).
Cold start:
— With throttle closed and choke activated (open throttle renders
— Be aware, no spark below crankshaft speed of 220 rpm. (propel-
— As performance of electric starter is greatly reduced when hot,
Remedy:
— Use of multigrade oil with the low end viscosity code of 5 or 10.
— Gap electrode on spark plug to the minimum or fit new spark
Effectivity: 912 Serie
OM Edition 1 / Rev. 0
starting carb ineffective).
ler speed of 90 rpm.).
limit starting to periods not much longer than 10 sec. With a well
charged battery, adding a second battery will not improve cold
starts.
plugs.
BRP-Rotax
page 10 - 18
Jan. 01/2007