Mercury MerCruiser MCM 454 Mag MPI Service Manual page 217

SERVICE MANUAL NUMBER 23
7.4L MPI (L-29) Engine Specifications (Continued)
PISTON RING
PISTON PIN
Clearance In
VALVE SPRING
Valve S ring Valve Spring
FLYWHEEL
Index
90-861326--1 MARCH 1999
Downloaded from https://needmanual.com/
MODEL
Groove Side Groove Side
Clearance
Compression
Gap Ga
Groove Side Groove Side
Clearance
Oil Oil
Gap
MODEL
Diameter
Production
Piston
Service
Fit In Rod
MODEL
Free Length
Pressure Pressure
Installed Height
MODEL
Runout
Production 2nd
Service
Top
Production Production
2nd
Service
Production
Service
Production
Service
.9895-.9897 (25.133-25.1383)
.0002-.0007 (0.0051-0.0177)
.001 (0.0254) Max
.0031-.0021 (0.0787-0.0533) Interference
1.838 in. (46.6850 mm) at 71-79 Lbs.
Closed Closed
1.3470 in. (34.2130 mm) at 238-262 Lbs.
Open
1.8380 (46.6850)
454 CID (7.4L) / 502 CID (8.2L)
7.4L
.0012-.0029 (0.0304-0.0737)
High Production Limit + .010
(0.254) Max
.010-.018 (0.254-0.457)
.016-.024 (0.406-0.6096)
High Limit Production + .010
(0.254) Max
.0050-.0065 (0.1270-0.1651)
High Limit Production + .001
(0.0254)
.010-.030 (0.254-0.762)
High Limit Production + .001
(0.0254)
7.4L
7.4L
2.12 (53.9)
( )
(316-351 N)
(1059-1165 N)
.07937 (2.015)
7.4L
.008 (0.203) Max
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