Jabiru 3300, Instruction And Maintenance Manual

Page: 70 / 103

Page No: 70 Issue No: 1 Date: 031100 Issued By: PJA
The Jabiru engine is run in on a DYNOMOMETER and cooled with fan driven air. In
the absence of a DYNO controlled run, engines can be run in in the airframe. Very large
air ducts must be constructed to get adequate airflow for cooling in the static situation.
The flying air ducts must not be used for this purpose. Extreme care must be taken with
the cylinder head temps if run in is done in the airframe. Engine run in procedure allows
progressive build up of the B.M.E.P. (break mean effective pressure) in the cylinders
while carefully limiting the heat build up. In essence short amounts of hard work
increasing in intensity while limiting the heat build up is the format. This can be seen in
detail after the engine build sheets.
All engines are run in before delivery including
overhauled engines as well. When delivered they are ready for flight.
Run Procedure
1)
Mount Engine on test rig (See engine installation)
2)
Fill with non detergent oil.
3)
Remove spark plugs and wind over until oil pressure is reached.
4)
Fit plugs and cooling ducts.
5)
Run in.
Follow run in program.
6)
Cool down (at least 12 hours)
7) Retorque
heads
8) Adjust
valves
9) Rerun
10)
Check leak down
Note: There is a run in program and run in checklist to fill out.