Jabiru 3300 - Tachometer and Sender; Figure 37 - Tacho Sender #1

Engine Maintenance Manual
Jabiru Aircraft Pty Ltd
JEM0002-5
Jabiru 2200 & 3300 Aircraft Engines
This document is controlled while it remains on the Jabiru server. Once this no longer applies the document becomes uncontrolled.
ISSUE
1
2
3
4
5
Dated : 2nd June 2015
Issued By: AS
Page: 65 of 103
L:\files\Manuals_For_Products\Engine_Manuals\Engine Maintenance Manual 22 & 33\JEM0002-5.docx
9.14 Tachometer and Sender
Required Tools:
Calibrated tachometer instrument
Thickness gauge
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)
 Many apparent engine problems can be caused through inaccurate tachometers. Where
engine performance is observed to be outside limits, the tachometer should be checked
against a calibrated instrument before other troubleshooting is attempted.
 Two types of sender have been used on Jabiru Engines as shown in Figure 37 (Type 1) and
Figure 38 (Type 2).
 For the Type 1 sender, the gap between the tip of the sender and the tags on the flywheel is
0.4mm (0.016"). The sender must have at least 60% covered by the tags fitted to the gearbox
side of the flywheel. Ensure both tags are equal distance from sender.
CAUTION
The tip of the sender is delicate and easily damaged. Care must be taken when adjusting
the sender gap to ensure the tag does not hit the sender.
 Type 2 senders are installed per the requirements of Figure 38.
Figure 37 – Tacho Sender #1
Tacho post with sender installed