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Engine Maintenance Manual
Jabiru Aircraft
Pty Ltd
JEM0002-5
Jabiru 2200 & 3300 Aircraft Engines
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ISSUE
1
2
3
4
5
Dated : 2nd June 2015
Issued By: AS
Page: 60 of 103
L:\files\Manuals_For_Products\Engine_Manuals\Engine Maintenance Manual 22 & 33\JEM0002-5.docx
9.8
Ignition Coil Gap Adjustment
Required Tools:
Metal gauge of correction thickness (see Section 3.4)
Screwdriver
Parts and Material:
N/A
Type of Maintenance:
Line Maintenance
Level of Certification:
L2 or LAME (A&P or LSA Repairman / Maintenance)
Return to Service:
L2 or LAME (A&P or LSA Repairman / Maintenance)
For best performance the gap between the ignition coil and the flywheel magnets must be set
to the specification given in Section 3.4.
To set gap, use a piece of gauge material the correct thickness. A metal gauge can be used,
as can alternatives made from plastic etc.
Loosen the screws holding the coil in place, move it away from the flywheel and then re-
tighten. This is to increase the size of the gap and allow the gauge to be inserted.
Rotate the crank until a magnet pole plate aligns with the coil being adjusted.
Place the gauge material between the coil and the flywheel magnet. Loosen the screws
holding the coil and allow the magnets to suck it against the gauge.
Tighten the screws, locking the coil in place.
Rotate the crank to draw the gauge material from between the coil and the flywheel.
When both coils are adjusted check that the gap is the same for both coils and all magnet pole
plates.
CAUTION
When working at the rear of the engine care must be taken to ensure no metallic materials
are captured by the ignition or alternator magnets.
9.9
High Tension Lead Inspection & Maintenance
Required Tools:
Screwdrivers
Parts and Material:
Replacement caps (if required)
Ether based starting spray (or other non-residue cleaner)
Type of Maintenance:
Line Maintenance
Level of Certification:
L1, L2 or LAME (A&P or LSA Repairman / Maintenance)
Return to Service:
L1, L2 or LAME (A&P or LSA Repairman / Maintenance)
Figure 6 above shows the High-Tension lead connections between the distributors and the
spark plugs.
At the intervals noted in Table 13 high tension leads must be inspected and, if necessary,
adjusted.
Inspect the length of each lead, checking for cracked or damaged insulation. Particularly check
areas where the lead may have been rubbing against other items in the engine bay.
Check the fit of the high-tension lead caps onto the distributor and spark plugs. Under the heat
and vibration of operation the lead caps may gradually work their way off the distributor
–
particularly if lubricant has been applied to the caps. If lubricant is found, clean it off using a
cleaner which does not leave a residue (Ether-based starting sprays can often be used).
Visually check the metal contacts inside the caps. If the fit is loose or if the contact is visibly
damaged as shown in Figure 34 then a screwdriver or similar must be used to re-shape the
contact (it should be round) and to re-size it for a better fit
– for a spark plug the diameter of the
contact needs to be reduced to tighten while for a distributor cap it needs to be expanded.
Each cap should fit with a clear “click” as it connects to the distributor cap or spark plug. Take
care not to over-bend and contact and replace any which are damaged.