Starter Motor; Troubleshooting; Wiring Diagrams; Engines & Generators - Westerbeke 7.6 kw EDT Operator's Manual

STARTER MOTOR
DESCRIPTION
The starter is a new type, small, light-weight
and
is called a
high-speed internal-reduction starter. The pinion shaft is
separate from the mot()f shaft; the pinion . slidesonly on the
pinion shaft. A reduction gear is installed between the motor
shaft and a pinion shaft. The pinion sliding part is not
exposed outside the starter so
that
the pinion may slide
smoothly without becoming fouled with dust and grease. The
motor shaft is supported at both ends on ball be3rlngs. The
lever mechanism, switch and overrunning clutch inner circuit
are identical to conventional ones.
TERMINALS
--~
MOTOR
TYPICAL
STARTER MOTOR
REFER TO THE WIRING
DIAGRAM IN THIS MANUAL
TROUBLESHOOTING
SOLENOID
A
WARNING:
The following emergency starting
procedures must not be used with gasoline engines.
Sparks could cause an explosion and fire.
Prior to testing, make certain the ships batteries are at
full
charge and that the starting system wiring connections
(terminals) are clean and tight. Pay particular attention to
the ground wire connections on the engine block.
To check the wiring, try cranking the starter for a few
seconds, never more
than
10 seconds at a thne, then run your
hand along the wires and terminals looking for warm spots
that indicate resistance. Repair or replace any trouble spots.
Using a multimeter, test the voltage between the positive
terminal stud on the start solenoid and the engine block
(ground).
If you read 12 volts, the starter
is
faulty.
'IGNITION
TERMINAL
: r " ' - - - , ( M ) TERMINAL
To test the ignition circuit, locate the ignition(s) terminal (it
is one of the small terminal stnds and is wired to the ignition
circuit). Use a screwdriver; don't touch the blade, to jump
from that ignition terminal to the positive battery connection
temtinal on the solenoid.
If the starter cranlrs, the fault lies with the ignition
circuit.
If the solenoid clicks but nothing happens, the starter
motor
is pr()ba·blyfau~ty.
SOLENOID
POSITiVE
IGNITION
~
If nothing bappens at all, the solenoid is not getting
current.. Check the battery isolation switch and inspect Ille
wiring connections. it is also possible
that
Ille solenoid is
defective.
A
WARNING:
There will be arching and sparks will
fiy when jumping terminals. Be certain the engine
space is free of potentially explosive fumes, especially
gasoline, and that there are!lJJ. fiammable solvents or
materials stored nearby.
Engines & Generators
19