IGNITION SYSTEM
SERVICE MANUAL NUMBER 26
IMPORTANT: Be sure to remove jumper wire before returning engine to service,
otherwise timing will not advance.
11.
Remove jumper wire at distributor white leads.
a
b
70103
a
a - WHITE Leads
b - Jumper Lead
12.
With timing light still connected, start the engine and run at IDLE. Verify that timing did
advance to :
•
•
•
If initial timing is 1° BTDC: 12° BTDC, plus or minus 2°. At 2400-2800 rpm maximum
(total) advance is obtained and should be 23° BTDC (plus or minus 2°).
If initial timing is 1° ATDC: 14° BTDC, plus or minus 2°. At 2400-2800 rpm maximum
(total) advance is obtained and should be 25° BTDC (plus or minus 2°).
If initial timing is 2° ATDC: 15° BTDC, plus or minus 2°. At 2400-2800 rpm maximum
(total) advance is obtained and should be 26° BTDC (plus or minus 2°).
13.
Stop the engine and remove the timing light.
Component Tests
The following tests can be made with the distributor and coil mounted on or off the engine.
The test procedures will check each component of the distributor and ignition coil. Distribu-
tor cap and rotor should be checked for corrosion, cracks, carbon tracks or wear. Replace
if needed.
Testing Ignition Module
In order to test the module, an approved module tester, such as Kent-Moore Tester (J24642
or equivalent), must be used. Be certain to follow the manufacturer’s directions precisely
for proper results. However, do not overlook that corrosion on the terminals of the module
could cause improper ignition action and should therefor be inspected and cleaned if
needed.
Index
Page 4B-12
90-861329--1 MARCH 1999
| 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)
Marine readers have rated Mercury MerCruiser GM 4 Cylinder 181 cid 3.0L Marine Engines Service Manual Number 26 5.0 out of 5.0 based on 6 product reviews. Thanks for sharing this material. Helps a lot after suffering with bad mechanics. spend too much money and nothing very good
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