Sonex Aircraft Aerovee 2.1, Assembly And Installation Manual

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63
AeroVee 2.1
Rev Z. 01/14/2015
Sonex Aircraft
LLC
© 2014 All Rights Reserved
TROUBLESHOOTING
Engine does not start
Possible Cause Remedy
1) Ignition OFF Switch ON
2) Spark plug gaps too large Adjust gaps or replace plugs
3) Closed fuel valve or clogged filter Open valve, replace or clean filter, check
for fuel system leaks
4) No fuel in tank Refuel
5) Wrongly connected spark plug leads Connect as shown in manual
6) Starting speed too low, faulty or discharged Recharge or replace battery
battery
7) Coil to magnet gap too wide Adjust to .010”
8) High tension leads loose or damaged Check or renew connections
9) Spark plugs damp due to condensation Thoroughly dry both inside and outside of
plugs
10) Spark plugs wet by fuel due to flooding Remove, dry and reinstall spark plugs
11) Water in fuel system Drain water from sump and tank
12) Insufficient compression Trace pressure loss & repair if necessary
13) Engine damage Inspect oil screen for metallic particles
If present, an engine overhaul may be
necessary.
14) No Spark from Secondary Ignition Check for/add ground wires from ignition
module cap screws to engine case.
Engine idles unsteadily after warm-up period and/ or smokey exhaust emission
Possible Cause Remedy
1) Rich idle setting Adjust AeroCarb (See AeroCarb manual)
2) Intake manifold leak Tighten all connections, replace hose
Engine runs erratically or misfires occasionally
Possible Cause Remedy
1) Spark plug failure Check plugs, clean inside & outside,
adjust electrode gap. If necessary,
replace plugs
2) Faulty ignition leads or caps Dry damp leads, replace damaged leads
3) Faulty ignition unit Replace ignition unit
4) Clogged fuel filter Clean or replace fuel filter
Engine runs too hot - Oil temperature above 230
o
F (110
o
C) or high CHT (400
o
+)
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 Change oil, use specified oil
4) Clogged oil screen Clean screen
5) Excessive piston blow by Common reason: worn or sticking piston
rings, “top” engine overhaul necessary
6) Faulty bearings If metallic particles are present in oil,
a complete engine overhaul is necessary
7) Faulty oil or CHT temperature gauge/ probes Replace the gauge or probes
8) Faulty cooling baffles Check for leaks, cowl inlets and exits and
baffles are built to plans
9) Oil cooler not installed Install recommended oil cooler and baffles
10) Secondary Ignition Advanced Retard Secondary Ignition Timing