SERVICE MANUAL NUMBER 24
5.0l / 305 cid / 5.7l / 350 cid ENGINES
Engine Operating
Following procedure is performed with engine operating:
1.
2.
Check engine for normal operating temperature.
Remove rocker arm covers and install rocker stoppers as shown.
aa
b
72301
a - Rocker Stoppers (91-66273)
b - Rocker Arm Nuts
3.
4.
With engine operating at idle, loosen one rocker arm nut until rocker arm starts to clatter.
Turn rocker arm nut down until clatter just stops. This is zero lash position.
IMPORTANT: The following one-turn preload adjustment must be done slowly to
allow the lifter to adjust itself. This will prevent the valves from hitting the pistons and
causing internal damage and/or bent push rods.
5.
Turn nut down 1/4 additional turn (90 degrees) and pause 10 seconds until engine runs
smoothly. Repeat until nut has been turned down one turn (360 degrees) from the zero
lash position.
6.
7.
8.
9.
Repeat Steps 2, 3, 4 to adjust other valves.
Remove rocker stoppers after all valves are adjusted.
Install rocker arm covers; torque screws to 106 lb-in. (12 Nm).
Adjust carburetor, if equipped, idle mixture and idle speed. Check for leaks.
Index
90-861327--1
OCTOBER 1999
Page 3A-25
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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Marine readers have rated Mercury MerCruiser Engines Service Manual Number 24 GM V-8 305 CID 350 CID 4.0 out of 4.0 based on 1 product reviews. Great performance engine.
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