Raytheon Beech Baron E55 - Page 397

BARON
55
AND
58
SHOP
MANUAL
CHART
6-5
TROUBLESHOOTING
THE
ENGINE
The
troubleshooting
chart
is
provided
as
a
guide.
Review all
probable
causes
given;
check other
listings
of
trouble
with
similar
symptoms.
The
items
are
presented
in
the
sequence
of
approximate
ease
of
checking,
not
necessarily
in
the
order
of
probability
of
occurance.
Indication Probable
Cause
Remarks
1.
Engine
will
not
start.
a.
no
fuel
gage
pressure
(No
fuel
a.
Check fuel control
for
proper
to
engine).
position,
with
auxiliary
pump
"ON"
and
operating,
feed
valves
open,
fuel
filters
open,
and
tank
fuel
level.
b. Have
gage
pressure
(engine
b.
Turn
off
auxiliary
pump
and
ignition
flooded),
switch,
set
throttle
to
full
open
and fuel
control
to
idle
cut-off,
then
crank
engine
to
clear
cylinders
of
excess
fuel.
Repeat
starting
process.
c.
Have
gage
pressure
(no
fuel
to
c.
Check
for bent
or
loose fuel
lines.
engine).
Loosen
one
line
at
fuel
noule;
if
no
fuel
shows,
replace
fuel
manifold
valve.
2.
Engine
starts
but
fails
to
keep
a.
Inadequate
fuel
to
fuel manifold
a.
Set
fuel
control
in
"FULL
RICH"
I
running
valve.
position,
turn
auxiliary
pump
"ON";
check
to
be
sure
feed
lines
and
filters
are
not
restricted.
Clean
or
replace
defective
components.
b.
Defective
ignition
system.
b.
Check accessible
ignition
cables
and
connections.
Tighten
loose
connections.
Replace
defective
spark
plugs.
3.
Engine
runs
rough
at
idle.
a.
Improper
idle mixture
a.
Readjust
idle
setting.
Tighten
adjustment.
adjustment
screw
to
lean mixture and
back
off
adjustment
screw
to
richen
mixture.
b.
Fouled
spark
plugs.
b.
Remove and
clean
spark plugs,
adjust
gap.
Replace
defective
spark
plugs.
4.
Engine
has
poor
acceleration.
a.
Idle mixture
too
lean.
a.
Readjust
idle
mixture
as
described
in
3a.
b.
Incorrect
fuel-air
mixture,
worn
b.
Tighten
loose
connections,
replace
control
linkage,
or
restricted air
worn
elements
of
linkage.
Service air
cleaner. cleaner.
c.
Defective
ignition
system,
c.
Check
accessible
ignition
cables and
connections.
Replace
defective
plugs.
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