SERVICE MANUAL NUMBER 26
IGNITION SYSTEM
Testing Ignition Coil
1.
If not already done, disconnect wiring from ignition coil. Connectors are molded and
keyed to assure proper positioning. The terminal (e) feeds 12 volts to the distributor.
NOTE: Upon reinstallation, first install black connector (distributor harness) to coil. Then
install gray connector (engine harness).
2.
Set ohmmeter to “Rx100” scale and connect one lead to 12 volt terminal (b) of coil and
the other lead to “ground” (d), any clean metal on the coil frame. Reading should be infi-
nite. If not, replace coil.
3.
4.
5.
Set ohmmeter to “Rx100” scale and connect to 12 volt terminal (b) and terminal (c).
Reading should be approximately .4 ohms. If not, replace coil.
Set ohmmeter to “Rx1” scale and connect to 12 volt terminal (b) and tachometer terminal
(f). Reading should be approximately .4 ohms. If not, replace coil.
Set ohmmeter to “Rx100” high scale. Connect ohmmeter to 12 volt terminal (b) and to
coil high tension post (a). Reading should be between 7800 and 8800 ohms. If it reads
outside of this range, replace coil.
Testing Pickup Coil
c
b
d
a
70105
a - Connector
b - GREEN Lead
c - WHITE Lead
d - Distributor Housing
1.
2.
Remove distributor cap.
Identify the two pickup coil leads. On almost all applications these two leads are one
WHITE and one GREEN. Remove the connector that houses these two leads from the
module.
3.
Set ohmmeter to “Rx1” scale. Connect one lead of ohmmeter to WHITE lead and the
other to distributor housing. Reading should be infinite. If not, replace pickup coil.
90-861329--1
MARCH 1999
Page 4B-13
Index
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 181 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(6 votes, average: 5 out of 5)
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great manual, makes impossible jobs possible. without a manual you can not do the job, a must have.
Great resource. Excellent information provided.
Need help to install automate choke
Need help to instal automate choke