Evinrude 4906B 4HP 1969 Owner's Manual page 171

5-12 IGNITION
and corroded breaker
Worn
service.
Breaker Points
The breaker points in an outboard motor
are an extremely
ignition system. A set of points may appear
to be in good condition, but they may be the
source of hard starting,
engine performance.
ledge gained from association
engines does not necessarily
cycle engine. The points should be replaced
every 100 hours of operation
once a year.
REMEMBER,
outboard engine is operated,
it needs. Allowing an outboard
remain idle will do more harm than if it is
used regularly.
A breaker point
points. One is attached
to
Drawing illustrate
tom set, compared with
other
the two.
points unfit for further
important part of the
misfiring, or poor
The rules and know-
with l,f.-cycle
apply to a 2-
or at least
the less an
the more care
engine to
set consists of two
to a stationary
proper
point alignment,
exaggerated misalignment
bracket and does not move. The other point
is attached
used to keep the points in contact with each
other, except when they are
the action of a cam built into the flywheel
or machined on the crankshaft.
are constructed
tungsten cap fused to the base.
To properly
problems,
must be understood.
through a wire may be compared
flow of water through a pipe. Consider the
voltage in the wire as the water pressure in
the pipe and the amperes as the volume of
water. Now, if the water pipe is broken, the
water does not reach the end of the pipe. In
a similar manner if the wire is broken the
flow of electricity
springs a leak, the amount of water reaching
the end of the pipe is reduced.
the wire.
the wire becomes grounded, the amount of
electricity
the wire is reduced.
Check the wiring carefully,
points closely and adjust them accurately.
The point setting for ALL engines covered in
this manual is 0.020".
useful information
new points is that
engines covered
same part number, 58014-8.
Drawing to
bot- inserted
between
of
actual opening is 0.021".
to
conditon obtain
to a movable mount.
separated
with a steel
diagnose magneto
the theory of electricity
The flow of electr ici ty
is broken.
If the installation is defective
(amperes) reaching
An added item of
simplifying
ALL point sets for the
in this manual have the
depict how a 0.016" feeler gauge may
a set of worn
badly
The point set must
an accurate
adjustment.
A spring is
by
Both points
base and a
(spark)
flow
with the
If the pipe
Same with
or
the end of
inspect the
purchase of
be
points and the
be in good