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Jabiru Aircraft
Pty Ltd
Instruction & Maintenance Manual
Jabiru 2200 Aircraft Engine
Hydraulic Valve Lifter Models
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REVISION
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Dated : June 2010
Issued By: DPS
Page: 111 of 116
L:\files\Manuals_For_Products\Engine_Manuals\Transition\JEM2204-9_I&M_unsigned.docx
14.2 Troubleshooting Quick Guide
14.2.1
Low Oil Pressure
A sudden drop of pressure usually is caused by a piece of foreign matter lodging under
the relief valve. Simply remove oil filter and cooler adaptor (if fitted). Remove matter by
depressing plunger or removing relief mechanism. Replace and check operation by
ground run. If low pressure persists the problem will need further investigation.
High oil temperature can cause low oil pressure. Ensure oil temperature remains
within limits at all times. The fitting of an approved oil cooler is strongly recommended.
14.2.2
Flicking Of Oil Pressure Gauge
It is not uncommon for the Jabiru engine to display flicking of the needle pointer for
brief periods but still within normal operating regions. If it continues, check continuity of
sender lead and or possible sender change. (We are assuming oil level is OK).
14.2.3
CHT
If the gauge is not reading, the cause can be cause by a break in the sender wires or
incorrect polarity.
High readings can result from a poorly centred sender under the spark plug.
Normal cruise CHT should not exceed 150
°
C and climb must not exceed 200
°
C. Air
ducts supplied at present give results below these figures.
14.2.4
RPM
Tacho’s may need adjustment when a new engine is fitted. Inducted magnet sender
units require coil gap to flywheel tags
of .014” or .35mm.
14.2.5
Magneto Checks
Possible causes of abnormal drop could be loose leads, faulty leads, rotor buttons, coil
gaps, spark plugs.
14.2.6
Rough Cylinder Running
Check plugs, ignition coils and the induction system for looseness.
14.2.7
Carby Breather
Carburetors have a brass fitting for venting. This is must be connected to a fitting
screwed into filtered side of the carby heat box
14.2.8
Limitations
Jabiru recommend TBO of 2000 hrs, with a Top End overhaul at 1000 or when engine
condition indicates the need for overhaul earlier.
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