9) Cold Weather Operation - Rotax 912 series Operator's Manual

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. (propeller
— 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
— Preheat engine using hot air.
Effectivity: 912 Serie
OM initial issue
starting carb ineffective).
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.
AIRCRAFT ENGINES
page 10 - 19
July 01/98