Starting Motor (013-020)
B3.9 and B5.9 Series Engines
Section 13 - Electrical Equipment - Group 13
If the crankshaft was not rotated to check the starting
motor, bar the crankshaft in the direction of engine rotation
to make sure the engine is free and does not have an
If the engine is free, check the voltage at the starting motor
during cranking. If the voltage drops more than 2.4 VDC on
a 12-VDC system, check that all connections are tight. The
limit for 24-VDC systems is 4.8 VDC.
If the cables are correct and the voltage drop exceeds the
limit, replace the starting motor.
If the crankshaft requires more than normal effort to bar,
check for excessive load from the driven units and
Batteries emit explosive gases. To avoid personal in-
jury, always ventilate the compartment before servicing
the batteries. To avoid arcing, remove the negative (-)
battery cable first and attach the negative (-) battery
Install the starter motor in the reverse order of removal.
Connect all cables connecting ground (-) last.