Mercury MerCruiser MCM 502 Mag MPI

454 CID (7.4L) / 502 CID (8.2L)
SERVICE MANUAL NUMBER 23
Page 3A-9
90-861326--1 MARCH 1999
454 Mag / 502 Mag / 8.2L (Except 7.4L MPI L-29) Engine Specifications
(Continued)
CRANKSHAFT
MODEL 454 MAG 502 MAG / 8.2L
Diameter
No.1,2,3,4,
5
2.7482-2.7489 (69.8042-69.8220)
Main
Ta
p
er
Production .0002 (0.005) Max
Main
Journal
Ta er
Service .001 (0.02) Max
Out of
Production .0002 (0.005) Max
Round
Service .001 (0.005) Max
Production
No.1,2,3,4 .0007-.0030 (0.043-0.076)
Production
No.5 .0025-.0038 (0.063-0.096)
Main
Bearing
Cl
No.1
.001-.003
(0.03-0.07)
.0010-.0015
(0.0254-0.0381)
Cl
earance
Service
No.2,3,4
.001-.003
(0.03-0.07)
.0010-.0025
(0.0254-0.0635)
No.5 .0025-.0040 (.0635-.1016)
Crankshaft End Play .006-.0010 (0.15-0.2)
Diameter 2.1990-2.1996 (55.8546-55.8698)
Connectin
g
Ta
p
er
Production .0005 (0.0127) Max
Connecting
Rod
Jl
Ta er
Service .001 (0.0254) Max
J
ourna
l
Out of
Production .0005 (0.0127) Max
Round
Service .001 (0.0254) Max
Rod Bearing Clearance
Production .0011-.0029 (0.028-0.074)
Rod
Bearing
Clearance
Service .003 (0.076) Max
Rod Side Clearance .013-.023 (0.35-0.58)
Crankshaft Runout @ No.3 Main
Bearing
.0015 (0.038) Max .0035 (0.088) Max
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Index