Textron Lycoming IO-540 Series User Manual

TEXTRON
LYCOMING
OPERATOR'S
MANUAL
0-540
& 10-540
SERIES
SECTION
5
(3) Using
a battery-powered
timing
light, attach the
positive lead
to
a suitable
terminal
connected
to the
switch terminal
of
the magneto
and
the negative
lead to
any unpainted
portion
of the
engine.
Rotate
the
magneto
in its
mounting
flange
to
a point
where
the light
comes
on, then
slowly
turn
it in the
opposite
direction
until the
light
goes
out. Bring
the magneto
back
slowly
until the
light just
comes
on.
Repeat
this
with the
second
magneto.
(4) Back
off
the crankshaft
a few
degrees;
the
timing
lights
should
go out. Bring
the
crankshaft
slowly back
in direction
of
normal rota-
tion until
the timing
mark
and the
hole in the
starter
housing
are in
alignment.
At this
point,
both lights
should
go on simultaneously.
Tighten
nuts
to
specified
torque.
(5) Dual
Magnetos
- Place
the engine
in
the No.
1 advance
firing
posi-
tion as
directed
in paragraph
lb(1).
(6) Install
the magneto-to-engine
gasket on
the magneto
flange.
WARNING
Do not
attach harness
spark
plug ends
to the spark
plugs until
all magneto-
to-engine
timing
procedures
and
magneto-to-switch
connections
are entirely
completed.
(7) To remove
engine-to-magneto
drive
gear
train backlash,
turn
engine
magneto
drive as
far as possible
in
direction
opposite to
nor-
mal
rotation;
then return
in the
direction
of normal
rotation
to timing
mark
on starter
support.
(8) Remove
the timing
window plug
from the most
convenient
side
of the magneto
housing
and
the plug
from the
rotor viewing
location
in
the center
of the housing.
(9)
Turn the
rotating
magnet
drive shaft
in the
normal direction
of
magneto
rotation
until the
painted tooth
of the
large distributor
gear
is centered
in the timing
hole.
(10)
Observe that
at this time the
built in pointer
just ahead
of the
rotor viewing
window
aligns
with the R
or L mark
on the
rotor depen-
ding on
whether the
magneto is of
right or left
hand rotation
as
specified on
the magneto
nameplate.
5-3

Textron Lycoming IO-540 Series Specifications

General

Brand	Textron
Model	Lycoming IO-540 Series
Category	Engine
Language	English