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Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
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ISSUE
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6 7
Dated : 28/10/2014
Issued By: AS
Page: 155 of 201
L:\files\Manuals_For_Products\Engine_Manuals\Overhaul_Manual\JEM0001-7_Overhaul_Manual_DRAFT_(29_10_14).docx
8 Post-Assembly
8.1 Oils
During initial running a non-detergent oil must be used to encourage proper bedding-in of components.
Oils must meet the following standards:
-
Aero Oil W Multigrade 15W-50, or equivalent Lubricant complying with MIL-L-22851C, or
-
Lycoming Spec. 301F, or
-
Teledyne
–Continental Spec MHF-24B
Table 7 shows oil recommendations for initial running. We recommend Areo Shell 100, Exxon Aviation
Oil 100 or BP Aviation Oil 100.
This oil must be used for the first 25 hours of operation after a top end inspection or overhaul or
whenever new or honed cylinders are fitted.
For further information on oils to use refer to the Jabiru Instruction & Maintenance Manual appropriate
to the engine.
Table 7
– Oil Recommendations for Run-In.
Oil Weight:
80
100
120
Outside Air Temperature
-17
°
C to 25
°
C
(1
°
to 77
°
F)
15
°
C to 35
°
C
(59
°
to 95
°
F)
Above 35
°
C
(95
°
F)
WARNING
Automotive oils MUST NOT be used. Automotive oils are not designed for the unique environment
of an air-cooled aero engine and have proven to give disastrous wear rates.
8.2 Before First Start
Check oil pressure.
The simplest way to do this test is to remove a spark plug from each cylinder,
then use the starter motor to spin the engine until the oil pressure reading comes up. Alternatively an
external oil pressure source can be plumbed into the engine. This test ensures that the oil circuit of the
engine is working properly before starting
– if a fault in the oil circuit was found with the engine running
damage to the main bearings etc is very likely.
Install to a suitable running rig.
Engines can be run-in on the ground on a test rig
– however it is
essential that this rig have oversize cooling ducts for the cylinder heads and for the oil cooler. Normal
aircraft ducts are not enough
– running an engine on the ground using aircraft cooling ducts can quickly
overheat and ruin an engine.