After Engine Start; Warming Up; Throttle Response; Ignition Check - Rotax 912 Series Operator's Manual

3.5) After engine start

Warming up

period

Throttle response

Ignition check

Propeller
governor
Page 3-8
November 01/2016
Non-compliance can result in serious injuries or death!
Do not start the engine if any person is near the running engine.
Step Procedure
1 Start warming up period at approx. 2000 rpm for approx.
2 minutes.
2 Continue at 2500 rpm, duration depending on ambient
temperature, until oil temperature reaches 50 °C (120 °
F).
3 Check temperatures and pressure.
After a full-load ground test allow a short cooling run at idle
speed to prevent vapour formation in the cylinder head.
Step Procedure
1 Short full throttle ground test (consult Aircraft Operators
Manual since engine speed depends on the propeller
used).
Check the two ignition circuits at 4000 rpm (approx. 1700 rpm
propeller).
Step Procedure
1 Speed drop with only one ignition circuit must not ex-
ceed 300 rpm (approx. 130 rpm propeller).
2 115 rpm (approx. 50 rpm propeller) max. difference of
speed by use of either circuit, A or B.
NOTE
The propeller speed depends on the actual reduction ratio.
Check of hydraulic propeller governor:
Check control of the hydraulic propeller governor to specifica-
tions of the manufacturer.
BRP-Rotax
m WARNING
ATTENTION
Effectivity: 912 Serie
Edition 4 / Rev. 0