Rotax 912 Series Service Instructions

d06322.fm
27 March 2017 12-10-00
page 6 of 11
Copyright - BRP-Rotax GmbH & CO KG. All rights reserved.
SI-912 i-001R4
SI-912-016R9 / SI-914-019R9
SERVICE INSTRUCTION
4.3) Waterless coolant for engine types 912/914 Series
An advantage of waterless coolants is their high boiling point which prevents “boiling“ of the cool-
ing system. However, its specific thermal capacity is lower than of conventional coolant which
resulting in slightly higher running temperatures.
The cooling system of ROTAX® engine types 912/914 Series (without Suffix - 01) is designed for
compatibility with waterless coolant and thus must not be modified, i.e. drainage or ventilation
holes must not be closed.
Recommended coolant (100% concentrate)
NOTE: EVANS
®
Cooling Systems, Inc. offers its NPG+C coolant worldwide under
several names. For some recent examples, see also the next table. For any
naming, specification or successor products contact your local EVANS
®
Cooling Systems, Inc. Official Partner
4.3.1) Warnings for operating with waterless coolant
- Water or coolant containing water must never be added to the cooling system!
- The max. water content must not exceed 3.6 %; it can be tested using a Brix refractometer.
- Any water present in the cooling system is separated out as vapor. This can cause the cooling
system to fail due to insufficient coolant quantity.
VELVANA
®
FRIDEX G49
YACCO
®
LR-35
Brand Description
m
WARNUNG
NOTICE
Waterless coolant is not permitted for engine types 912 i Series or for
912/914 Series with cylinder head version Suffix - 01.
m
WARNUNG
NOTICE
The certification and determination of the correct coolant type must be
conducted by the aircraft manufacturer. As each aircraft type has different
characteristics, testing must be done to determine the most suitable cool-
ant and instrumentation for each aircraft type.
m
WARNUNG
NOTICE
EVANS
®
coolants are fully operational to -40 °C (-40 °F). It will not freeze
and expand like conventional coolant.
Brand Description
EVANS
®
Aero Cool 180° Europe/Middle East
NPG+C China
Evans High Performance Coolant USA and rest of the world

Rotax 912 Series Specifications

General

Redline	5800 rpm
TBO	2000 hours
Displacement	1211 cc
Bore	79.5 mm
Stroke	61 mm
Power Output	80 hp (59.6 kW)
Compression Ratio	9.0:1
Fuel Type	Avgas 100LL
Ignition System	Dual electronic ignition
Fuel System	Fuel Injected
Oil System	Dry sump
Engine Type	4-cylinder, horizontally opposed, 4-stroke