Mercury MerCruiser MIE 454 Mag MPI Horizon User Manual

454 CID (7.4L) / 502 CID (8.2L) SERVICE MANUAL NUMBER 23
Page 3A-12
90-861326--1 MARCH 1999
7.4L MPI (L-29) Engine Specifications
NOTICE
Unit Of Measurement: U.S. Quarts (Liters)
All capacities are approximate fluid measures.
MODEL 7.4L
Displacement 454 cid (7.4L)
Bore 4.25 (108)
Stroke 4.00 (101.6)
Compression Ratio 9.3:1
Heads Cast Iron (Oval Port)
Intake Manifold
Lower Half: Cast Iron
Upper Half: Aluminum
Block Cast Iron (4 Bolt Main Bearing Caps)
Rods Forged Steel
Pistons Cast Aluminum
Crankshaft Nodular Cast Iron
Camshaft Steel
CYLINDER BORE
MODEL 7.4L
Diameter 4.2500-4.2507 (107.950-107.968)
Out of Round
Production .001 (0.0254) Max
Out
of
Round
Service .002 (0.051) Max
Production
Thrust Side .0005 (0.0127) Max
Taper
Production
Relief Side .001 (0.0254) Max
Service .001 (0.0254) Over Production
PISTON
MODEL 7.4L
Clearance
Production .0018-.0030 (0.0457-0.0762)
Clearance
Service .0018 (0.0457) Max
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Index

Mercury MerCruiser MIE 454 Mag MPI Horizon Specifications

General

Brand	Mercury
Model	MerCruiser MIE 454 Mag MPI Horizon
Category	Engine
Language	English