Rotax 912-UL Repair Manual page 43

6.18.2)External trigger coils
The exchange of the triggercoils O on the dual ignition unit can be done in pairs only,
because of the screening harness. Pay anention to the axial position, determined by
distance sleeves 9.
The cables must be fixed in position without fail by clamps. To prevenr breakage due
to vibrations, SIKAFLEX adhesive putty O must be used on cable joints at trigger
coil. The trigger coils O (marked by red sleeves) serving ignition circuit rf B" are
fined in the lowerposition. A trigger gap of 0,4+ 0,5 mm (.016+.020 in.) is set after
the fitting of ignition cover and magneto housing.
6.18.3) Interference suppression box
Generally, any repair work on suppression box ought to be carried out at ROTAX.
Dis-assem bly of in terference su ppression box :
The2 electronic boxes, 4 double ignition coils and 2 feed-through capacirors are
placed in the interference suppression box. On every suppression box you will find
a successive serial number on its cover. Always state this number on inquiries.
To prevent any mix-up at a later stage, mark all 8 H.V. (high voltage) leads according
to code on cover, prior to withdrawal. Remove 3 countersunk screws M4x8 and uppei
half of high voltage clip plate. Now, single H.V. leads can be exchanged ar trquirld.
H.V. leads are available pre-assembled with connection to spark plug.
Mark all connections to ignition coils and then detach wiring. Remove 4 countersunk
screws M4xl2 from underside of electronic box and detach mass connection. The
complete set of ignition coils can be withdrawn now. If need be, remove electronic
boxes as well, afterdisconnecting shorting lines from capacitors. Check capacitors,
renew as required. Check all other components.
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