SERVICE MANUAL NUMBER 26
181 CID (3.0L) 4 CYLINDER GM ENGINE
2.
With engine in No. 1 firing position as determined above, the following valves may be
adjusted:
•
No. 1 Cylinder - Exhaust and Intake
No. 2 Cylinder - Intake
•
•
No. 3 Cylinder - Exhaust
No. 4 Cylinder - Intake
•
3.
Loosen adjusting nut until lash is felt at push rod, then tighten adjusting nut until all lash
is removed. This can be determined by moving push rod up and down while turning
adjusting nut until all play is removed.
72300
4.
5.
Hydraulic lifters can be adjusted by tightening adjustment nut an additional 3/4-turn.
Valve lash should be checked after engine has run and reached operating temperature.
Crank engine one revolution until pointer “0” mark and torsional damper mark are again
in alignment. This is No. 4 firing position. With engine in this position, the following valves
may be adjusted:
•
No. 2 Cylinder - Exhaust
•
No. 3 Cylinder - Intake
•
No. 4 Cylinder - Exhaust
6.
7.
8.
Repeat steps 3-4 to adjust other valves.
Install Distributor cap, spark plug wires and coil lead.
Install rocker arm cover; torque to 40 lb-in. (4.5 Nm).
Engine Running
Following procedure should be completed only if readjustment is required.
1.
2.
Run engine until it reaches normal operating temperature, then remove valve cover.
With engine running at idle, loosen valve rocker arm nut until valve rocker arm starts to
clatter.
3.
4.
Turn rocker arm nut down slowly until clatter just stops. This is zero lash position.
Tighten nut 1/4 additional turn and pause 10 seconds until engine runs smoothly. Repeat
additional 1/4 turns, pausing 10 seconds each time, until nut has been tightened 3/4 turn
from zero lash position.
Index
90-861329--1
MARCH 1999
Page 3A-19
| 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