Mariner 100, Service Manual, Page: 23 / 391

2A-4 90-13645--2 1095 ELECTRICAL AND IGNITION
WARNING
When testing or servicing the ignition system,
high voltage is present, be extremely cautious!
DO NOT TOUCH OR DISCONNECT any ignition
parts while engine is running, while key switch is
on, or while battery cables are connected.
Failure to comply with the following items may
result in damage to the ignition system.
1. DO NOT reverse battery cable connections.
The battery negative cable is (-) ground.
2. DO NOT “spark” battery terminals with battery
cable connections to check polarity.
3. DO NOT disconnect battery cables while en-
gine is running.
4. DO NOT crank engine when switch box is not
grounded to engine.
CAUTION
A process of elimination must be used when checking
the ignition system without a Multi-Meter/DVA Tester
(91-99750) or a voltmeter (capable of measuring 400
volts DC, or higher) and Direct Voltage Adaptor
(91-89045), as the switch box and ignition coils
cannot be thoroughly checked with conventional test
equipment.
All other components can be tested with an
ohmmeter. Before troubleshooting the ignition
system, check the following:
1. Make sure that electrical harness and ignition
switch are not the source of the problem.
2. Check that plug-in connectors are fully engaged
and terminals are free of corrosion.
3. Make sure that wire connections are tight and free
of corrosion.
4. Check all electrical components, that are
grounded directly to engine, and all ground wires
to see that they are grounded to engine.
5. Check for disconnected wires, and short and
open circuits.
STATOR TEST
NOTE: Stator can be tested without removing from
engine.
1. Disconnect stator leads from switch box.
2. Use an ohmmeter and perform the following tests.
IMPORTANT: If stator is mounted on engine, black
stator lead must be grounded to powerhead when
testing.
9/18/24 AMPERE STATORS (3 CYLINDER)
Test Leads
Resistance
(OHMS)
Scale Reading
(x__________)
Between Blue Stator Lead
and Red Stator Lead (Low
Speed)
3600-4200
(90-140)
3.6-4.2
(R x 1000)
Between Red Stator Lead and
Engine Ground* (Hi-Speed)
90-140
90-140
(R x 1)
9/18/24 AMPERE STATORS (4 CYLINDER)
Test Leads
Resistance
(OHMS)
Scale Reading
(x__________)
Between Blue Stator Lead
and Blue/White Stator Lead
(Low Speed)
6800-7600
(90-140)
6.8-7.6
(R x 1000)
Between Red Stator Lead and
Red/White Stator Lead* (Hi-
Speed)
90-140
90-140
(R x 1)
* Connect test lead to black stator lead if stator is removed from
engine.
NOTE: Above readings are for a cold engine (room
temperature). Resistance will increase slightly, if en-
gine is warm.
3. If meter readings are other than specified, replace
stator assembly.