Evinrude 4906B 4HP 1969 Owner's Manual page 202

Most amp-meters
Therefore, it is only necessary for the scale
to register in the 10-amp area, while the
engine is operating above 1500 rpm, to indi-
ca te satisfactory performance
a- The 4-amp or 20-amp
junction box may have burned, opening the
circuit. If the fuse requires replacement,
check should be made immediately,
termine why the fuse burned protecting
circuit.
b- The voltage regulator
tive. If the regulator has failed, a thorough
check of the circuit to determine the cause.
Simply replacing the regulator
not solve the problem and the new regulator
may be damaged when the engine and gener-
ator are operating.
c- The generator
fail to produce the current
maintain the battery.
simply be worn brushes.
new brushes may solve the problem.
ever, if the brushes are in good condition,
and testing reveals the generator
replaced, the conservative
install a new voltage regula tor at the same
time.
CRITICAL WORDS
The engine must be operated, in gear, at
speeds in excess of 1500 rpm to test the
generator circuit.
MUST be mounted in a body of water to
prevent a RUNAWAY condition and serious
damage to internal parts, or destruction
the unit. NEVER attempt
engine above idle speed with a flush attach-
ment connected to the lower unit or with
the engine mounted in a small test tank,
such as a fifty-gallon drum.
CAUTION: Water must circulate through
the lower unit to the engine any time the en-
gine is run to prevent
pump in the lower unit. Just five seconds
without water will damage the water pump.
1- Check to be sure all electrical
nections in the circuit are secure and free
of corrosion. Double check
connections and terminals.
are badly corroded, there is no way on this
green earth for the current produced by the
generator to reach the battery
special wire brush can be purchased at very
modest cost to clean the inside of the wire
connectors. A common wire brush may be
used to clean the battery terminals.
have a 20-amp scale.
fuse in the
to de-
may be defec-
usually will
may be defective
necessary
The problem may
Replacement with
How-
must be
mechanic will
Therefore, the engine
to operate the
damage to the water
con-
the battery
If the terminals
cells.
Baking
a
the
and
to
soda and water is a good cleaning agent for
the battery surface.
2- Check the wiring in the circuit
broken insulation, or an actual break in the
line. Disconnect
lead from the battery
gainst an accidental
to the voltage regulator.
of
tion box cover.
A
CHARGING CIRCUIT
the POSITIVE electrical
as a precaution
short causing damage
Remove the junc-
Check the condition of the
6-13
for
a-