INSTRUCTION AND MAINTENANCE MANUAL FOR ... - Jabiru Aircraft

Jabiru Aircraft Pty Ltd
Instruction & Maintenance Manual
Jabiru 3300 Aircraft Engine
Hydraulic Valve Lifter Models
12.1.4 Engine Runs Too Hot - Oil Temperature Above 110oC (230oF)
Possible Cause Remedy
1) Too much oil in crankcase Check oil level & adjust if necessary
2) Low oil level Check oil level & add oil if necessary
3) Poor quality oil Oil change, use specified oil
4) Clogged oil filter Change filter
5) Excessive piston blow by Common reason: worn or sticking piston rings,
complete engine overhaul necessary
6) Faulty bearings If metallic particles are present in oil, complete
engine overhaul necessary
7) Faulty oil temperature gauge Exchange gauge
12.1.5 Unsatisfactory Power Output
Possible Cause Remedy
1) Ignition failure Check ignition circuits; check wiring and pickups;
replace ignition units.
2) Too much oil in crankcase Check oil level & adjust if necessary
3) Insufficient fuel supply Check fuel supply system
4) Fuel not according to specifications Re-fuel with specified fuel
5) Incorrect throttle adjustment Re-adjust throttle fitting
6) Leak in air intake Check and tighten all connections, check carby
sockets.
7) Carby diaphragm damage renew diaphragm
12.1.6 Low Oil Pressure
Possible Cause Remedy
1) Insufficient oil in sump Check oil level & replenish as necessary
2) High oil temperature Refer to Para. 10.4
3) Faulty pressure gauge, sender or wiring Check gauge, sender & wiring. Renew as
necessary.
4) Faulty crankshaft bearings Engine overhaul
5) Relief valve not sealing Inspect, replace back after cleaning
12.1.7 Engine Keeps Running with Ignition Off
Possible Cause Remedy
1) Idle speed too high Adjust to proper idle speed (900 RPM)
2) Faulty ignition switch Check switch & cables. Repair/replace as
necessary
3) Overheated engine Conduct cooling run at 900 RPM
12.1.8 Excessive Oil Consumption
Possible Cause Remedy
1) Worn, broken or wrongly fitted piston rings Repair/engine overhaul necessary
2) Poor oil quality Oil change, use specified oil
3) Worn valve guides Repair of cylinder head necessary
4) Oil leaks Seal leaks
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REVISION 0 1 2 3 4 5 6 7 8 9 Dated : Apr 2011 Issued By: DPS Page: 48 of 53
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