9) Check Of Ignition Circuits (Magneto Check) - Rotax 914 F Maintenance Manual

13.4.9) Check of ignition circuits (magneto check)

Let engine run warm. Make magneto check at engine speed of 4150 r.p.m.
(1700 r.p.m. propeller speed).
Switch off ignition circuit "A" with ignition switch. This causes only 1 spark
plug per cylinder to ignite. The speed drop with only one ignition circuit must
not exceed 300 r.p.m. Then make the same check with ignition circuit "B"
switched off. Also here the speed drop must not exceed 300 r.p.m. Difference
of speed by use of either circuit, A or B, must not exceed 115 r.p.m.
Modification no. Reference Main Date Page
- 0 - 914 F 1997 02 01 169