Westerbeke Universal M-50 - No-Load Testing of Starter; Starter

STARTER
Checking Sequence
If the starter system malfunctions, do the following checks to locate the cause:
- -_. - - -
---------t~ (B) Battery terminal check
(A) Check the
circuit ~
L.--(C) Wiring check
- -c (E) Motor test (2).
(D) Test the starter
at no-load (1).
(F) Magnet switch check (3).
No-Load Testing
of Starter
1. Connect the ammeter's positive probe to the battery's positive terminal and the negative probe
to the starter's B terminal.
2. Connect the battery's negative terminal to the starter body.
3. Connect the voltmeter's positive probe to the starter's B terminal and the negative probe to the
starter
body.
4. Set a tachometer.
5. Connect the starter's B terminal to the magnet switch's S terminal.
6. Check to see that the magnet switch is operating and that the specified speed, current and
voltage are obtained.
NOTE FOR CHECKING: Use a fully charged battery. Use an ammeter and leads of about
200A rating because a large current flows when the starter is running.
Electrical connections for no-load testing
133
M-30
M-40
M-50
Current
Voltage Rotational speed
45A or less 11.0 V 6000 rpm or more
gOA or less
11.5 V
3000 rpm or more