Mercury MerCruiser MCM 454 Mag MPI Service Manual page 215

SERVICE MANUAL NUMBER 23
454 Mag / 502 Mag / 8.2L (Except 7.4L MPI L-29) Engine Specifications
(Continued)
ROLLER TAPPET CAMSHAFT
FLYWHEEL
CYLINDER HEAD
Index
90-861326--1 MARCH 1999
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MODEL
Lobe Lift Lobe Lift .020 (0.051) 020 (0 051)
Duration at .050 In.(1.27mm) (
Cam Lift
Journal Diameter
Journal Out Of Round
Camshaft Runout
Timing Chain Deflection
MODEL
Runout
MODEL
Gasket Surface Flatness
Exhaust
Intake
Exhaust
)
Intake
454 MAG / 502 MAG / 8.2L
454 MAG / 502 MAG / 8.2L
.007 (0.178) Overall Maximum .003
(0.076) within a 6 in. (152 mm) Span
454 CID (7.4L) / 502 CID (8.2L)
454 MAG / 502 MAG / 8.2L
.301 (7.645)
.301 (7.645)
227
211
1.9482-1.9492 (49.485-49.509)
.001 (0.025) Max
.002 (0.051) Max
.375 (9.5) from taut position
[total .75 (19)]
.008 (0.203) Max
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