Thrush Aircraft S2R-R1340 Maintenance Manual page 108

Table 4-1: Engine Trouble Shooting Chart, Page 13 of 13
TROUBLE
Burned breaker
points
One spark plug
cutting out or dead
Both plugs in one
cylinder cutting
out
Front or rear
spark plugs cutting
out on all cylinders
On magneto check,
all spark plugs
firing but engine
does not develop
power
Metal or Foreign
material in
strainer, screens or
sumps
4-38
THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
PROBABLE CAUSE
Point clearance too small
Faulty condenser
Oil on points
Fouled spark plugs
Faulty wires in ignition cable manifold
Faulty distributor segment
Fouled spark plugs
Faulty wires in ignition cable manifold
Cylinder pumping oil
Right or left magneto malfunctioning
Ground wires in magneto broken
Ignition switch faulty
Magneto timing off
Lack of care in assembling engine
Damaged engine parts
Foreign material in oil or oil system
Contaminated oil cooler
REMEDY
Reset point clearance.
Replace breaker points if
necessary.
Replace condenser
Replace and reset
breaker points
Replace spark plugs
Replace manifold
Replace magneto
Replace spark plugs
Replace manifold
Replace cylinder
Replace magneto
Replace magneto
Replace switch
Retime magneto
Replace engine
Replace engine
Replace engine
Replace cooler
Effective: 01/01/2008