Diamond Aircraft DV 20 KATANA, Maintenance Manual

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AIRCRAFT
Power Plant (Engine) DV 20 KATANA AMM
Complaint Possible Cause Repair
%
Page 8
15 Dec 2018
71-00-00
Doc # 4.02.02
Rev. 13
Engine idles unsteadily after
warm up, black exhaust gas
Choke activated. Deactivate.
Carburetors synchronized
inadequately.
Adjust carburetors.
Fuel needle unclean, jammed,
or worn.
Clean or replace.
Intake manifold leaky. Tighten all connectors, replace
defective parts.
Engine runs irregularly or
misfires occasionally.
Spark plugs do not fire. Check plugs, clean inside and
outside, adjust electrode gap;
replace plugs if necessary.
Spark discharge over ignition
wires.
Dry wet wires;
replace defective wires.
Defective ignition box. Have box repaired, or replace.
Clogged fuel filter. Clean.
Engine runs too hot, oil
temperature exceeds 140°C.
Too much oil remaining in
crankcase.
Check oil return line for
clogging; check engine for gas
mixture leakage.
Insufficient air stream to oil
radiator.
Check for free air passage;
clean.
Insufficient oil supply. Check oil level; replenish if
necessary.
Poor oil quality. Change oil, use approved oil.
Clogged oil filter. Replace.
Excessive piston blow-by. Usual reason: worn or seized
piston rings, overhaul required.
Defective bearings. If there are metal particles in
the engine or oil tank -
overhaul required.
Defective oil temperature
indicator.
Replace.