Evinrude 4906B 4HP 1969 Owner's Manual page 200

Test the winding for an open circuit,
faulty insulation, or poor ground. Check the
resistor with an ohmmeter,
denser for capacity,
Inspect the diaphragm for cracks.
Adjust Hom Tone
Loosen the locknut, and then rotate the
adjusting screw until the desired
reached. On a dual horn installation,
connect one horn and adjust each, one-at-a-
time. The contact point adjustment is made
by inserting a 0.007" feeler
between the adjusting nut and the contact
blade insulator. TAKE CARE not to allow
the feeler gauge to touch the metallic parts
of the contact points because it would short
them out. Now, loosen the locknut and turn
the adjusting nut down until the horn fails to
sound. Loosen the adjusting nut slowly until
the horn barely sounds.
be tightened after
feeler gauge is withdrawn
operate properly and the current draw will
be satisfactory.
Small horsepower engines
an motor.
of electric starter
on
mounted top of the engine
on the model.
or test the con-
ground, and leakage.
tone is
dis-
gauge blade
The locknut MUST
each test. When the
the horn will
use a starter
hand instead
The hand starter may
or
on the side, depending
GENERAL INFORMATION
6-8 ELECTRICAL
GENERAL
Probably 75-80% of all Johnson/Evinrude
engines covered in this manual are started
by pulling on a rope.
increased the size and horsepower
engines, it was necessary
some form of power cranking
addition to
day, most small engines are still started
only by pulling on a rope.
On the larger
starter motor
gear mesh between the cranking motor and
the engine flywheel, similar to the method
used to crank an automobile
added. This system provided an alternate
method to the hand starter
ment. If the electric
inoperative
or weak battery,
cranked and started by hand.
Since the starting motor requires a large
amount of electrical
to have a fully charged battery available for
the starting system.
with several electrical
bait tank with circulating
number of running and accessory lights etc.,
the char ging system
properly to keep the battery charged.
Charging Circuit
The charging circuit consists of a gener-
ator driven
flywheel. The flywheel is equipped with a
pulley arrangem ent to transfer
tation to the generator
belt.
Choke Circuit
The choke is activated
This solenoid attracts
choke valves.
when the ignition
START position
depressed.
the manual choke MUST be in the NEUTRAL
position.
Only the electric choke is covered in this
chapter. Service procedures
electric choke, and the water
presented in Chapter
Starting Circuit
The starting
be
ing motor and a starter-engaging
nism. A solenoid is used as a heavy-duty
SYSTEM
~FORMATION
As the manufacturer
to incorporate
the rope starter method.
hp engines,
coupled with a mechanical
engine, was
rope arrange-
cranking
for any reason, including a dead
the engine may still be
current, it is necessary
If the boat is equipped
accessories,
pump, radio, a
must be performing
by a belt connected
flywheel ro-
puller through the
by a solenoid.
a plunger to close the
The solenoid is energized
key is turned
and the choke button
When using the electric
for the heat/
4.
circuit consists of a crank-
6-11
of the
system in
To-
an electric
system is
such as
to the
to the
is
choke,
choke, are
mecha-