BushCADDY LSA Pilot Operating Handbook
Rev.03 5 March, 2008
Page 50 of 52
7) Carby diaphragm damage renew diaphragm
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
10.7 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
Page No: 101 Issue No: 2 Date: 031100 Issued By: PJA
10.8 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
10.9 Knocking Under Load
Possible Cause Remedy
1) Octane rating of fuel too low Use fuel with higher octane rating
2) Spark plug fitted without sealing washer Ensure one sealing washer on each plug
3) Heavy carbon deposits Remove cylinder heads & in combustion
chamber remove deposits. Determine oil
consumption.
10.10 Engine Hard to Start at Low Temperature
Possible Cause Remedy
1) Starting speed too low Preheat engine
2) High oil pressure At very low temperatures, a pressure
reading of up to around 500 kpa doesn't
necessarily indicate a malfunction
3) Low battery charge Fit fully charged battery
Note: running this engine on low octane fuel will cause piston damage and in extreme
cases failure of the top ring gland or holed piston due to detonation. Changing the
engine tuning to a leaner air/fuel mix will also cause piston and engine damage.
