Airplane Maintenance Manual
Bristell
B23-915
Chapter 72
supplement
Chapter 72 Page 2
Issue: 09.12.2021
72-00
General
ROTAX 915 iSc3 A is a turbocharged, four-stroke, four-cylinder,
opposed - cylinder engine, central cam shaft and OHV - mechanism
with maximal power of 104 kW (141 hp) at 5800 RPM.
Technical Data
Engine Model:
ROTAX 915 iSc3 A
Engine Manufacturer:
Bombardier-Rotax GMBH
P
o
we
r
Max Take-off:
141 hp at 5800 rpm, max.5 min.
Max. Continuous:
135 hp at 5500 rpm
E
n
g
in
e
RP
M
Max. Take-off:
5800 rpm, max. 5 min.
Max. Continuous:
5500 rpm
Idling:
1800 rpm
M
a
n
if
o
ld
Air
P
re
s
s
u
re
(M
AP
)
Minimum
60hPa (1.77 in. HG)
Maximum
1730hPa (51in. HG)
Co
o
la
n
t
te
m
p
e
ra
tu
re
(CT
)
Minimum:
50 °C (122 °F)
Maximum:
120 °C (248 °F)
Optimum:
80
– 110 °C (176-230 °F)
Oil
te
m
p
e
ra
tu
re
Minimum:
50 °C (122 °F)
Maximum:
130 °C (266 °F)
Optimum:
90
– 110 °C (190-230 °F)
Oil
p
re
s
s
u
re
:
Minimum:
0.8 bar (12 psi) - below 3500 rpm
Maximum:
7 bar (102 psi) - cold engine start
Optimum:
2 - 5 bar (29
– 73 psi) - above 3500 rpm
F
u
e
l
p
re
s
s
u
re
Minimum:
2.9 bar (42 psi), (max 3 sec: 2.5 bar)
Maximum:
3.2 bar (45 psi), (max 3 sec: 3.5 bar)
E
x
h
a
u
s
t
g
a
s
e
s
te
m
p
.
Maximum:
950 ° C (1742 °F)
E
n
g
in
e
s
ta
rt
,
o
p
e
ra
ti
n
g
te
m
p
e
ra
tu
re
Maximum:
50 °C (120 °F) (ambient temperature)
Minimum:
-40 °C (-40 °F) (Oil temperature)
