Service Manual

ELECTRICAL SYSTEMS

7 - 20 Mid-Mount Z Service Manual

Purpose

The stator generates 25 amps of alternating current to

charge the battery.

How It Works

Whenever a magnet passes by a coil of wire on an iron

core, electricity is produced. The amount will depend

on the thickness of wire, the number of windings on

each coil, the strength of the magnet, and the speed at

which the magnet is moving.

This particular coil has 18 poles to produce 25 amps at

28 or more volts A.C. when the engine is running at

3600 rpm. The current produced is alternating current

since no diode or rectifier is internal to the stator.

* With regulator/rectifier disconnected

Testing

1. Remove the connector from the regulator rectifier.

Measure the voltage across the two A.C. leads on

the alternator side of the connector with the

engine running at 3600 rpm. If voltage is less than

28 volts, proceed to the next step. Otherwise,

stator is OK.

2. With the stator still disconnected and the engine

off, measure the resistance across the two A.C.

leads running to the stator. The resistance should

be .1 to .2 ohms. If not, replace the stator.

Stator Output Stator Resistance

More than 28 VAC @ 3600 rpm .64 - .2 ohms

Alternator

(Kohler)

(A) Magnets (B) Coil