Crankcase Oil Dipstick Specifications; All Engines - Mercury MerCruiser MCM 454 Mag MPI Service Manual

454 CID (7.4L) / 502 CID (8.2L)
6. Check installed height of valve springs using a narrow, thin scale cutaway as shown.
Measure from spring seat to top of valve spring, as shown. If measurement exceeds
specified height, install a valve spring shim and recheck. DO NOT shim valve springs
to give an installed height less than the minimum specified.
Cutaway Scale

Crankcase Oil Dipstick Specifications

All Engines

Index
Page 3A-48
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a
a - Cut Away This Portion 1/2 Inch (13 mm)
b - Valve Spring Installed Height
Unit Of Measurement: U.S. Inches (millimeter)
a
1/2
(13)
33-1/2
(849)
35-1/4
(895)
FULL
ADD
1/2
(13)
a - MCM Engines And Some MIE Models With Front Mounted Dipstick (805567)
b - MIE Engines With Velvet Drive (72 Series) In Line Transmissions (821503-3)
c - MIE Engines With Down-Angle, V-Drive, Or Remote V-Drive Transmissions
(821503-4)
50037
NOTICE
b
1/2
(13)
15-1/8
(384)
17-13/64
(437)
FULL
FULL
ADD
ADD
19/32
(15)
SERVICE MANUAL NUMBER 23
b
72562
c
1/2
(13)
16-43/64
(423)
19-7/64
(485)
59/64
(23)
90-861326--1 MARCH 1999
72341