Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
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Dated : 28/10/2014
Issued By: AS
Page: 140 of 201
L:\files\Manuals_For_Products\Engine_Manuals\Overhaul_Manual\JEM0001-7_Overhaul_Manual_DRAFT_(29_10_14).docx
7.8.8 Ignition Posts & Alternator Stator
Figure 176
– Ignition Post & Alternator Stator Installation
The alternator and ignition coil posts are held to the engine using 4 off AN4-37A bolts. Ensure that
metal-lock nuts are used as shown in Figure 176. Roll pins are also used to hold these parts in position
– tap them together on assembly using a soft hammer.
Once the posts are in place the ignition coils can be fitted. The
simplest method is to use a large 0.010”
feeler gauge
– lie this gauge against one of the magnet poles of the flywheel – the magnetism will keep
it in place. Then rotate the engine until this pole lies beside the coil whose gap you wish to set. Again,
the magnetism will hold the coil against the feeler gauge and the coil mounting screws can now be
tightened. Once both coils have been positioned this way check the gap between each magnet pole
and each ignition coil
– on older engines the magnet poles may not be in exactly the same position on
the flywheel which may vary the gap. In this case a compromise adjustment must be found to get all
coil gaps within the limits set in Table 12.
Note that insulating washers are fitted between the ignition coils and the mounting post
– this is to
minimise heat transfer into the coil.
When installing the coils note the orientation
– in all cases the output lead from the coil must point in the
direction of propeller rotation.
Alternator mount post bolts
Coil mount screw