1985-1989 MerCruiser GM V-8 Engine Service Manual (454 CID / 502 CID)
MerCruiser 1985-1989 MCM 454 CID (7.4L) and MCM 502 CID (8.2L) Marine Engines service manual. PN 90-823224-2.
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Sample pages from the 1985-1989 MerCruiser GM V-8 Engine Service Manual (454 CID / 502 CID) manual
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Models Covered & Key Technical Specifications
MerCruiser GM V-8 Engine Service Manual (1985-1989) - Number 16
| Addresses MCM 454 CID (7.4L) / MCM 502 CID (8.2L) systems including engine, fuel, cooling, and electrical systems. | Specification Category | Specification Value | Details |
|---|---|---|---|
| Engine Displacement | 454 CID (7.4L) / 502 CID (8.2L) | Standard displacement for V-8 engines. | |
| Bore x Stroke | 4.25 x 4.00 in. (108 x 101.6 mm) / 4.47 x 4.00 in. (113.5 x 101.6 mm) | Dimensions for the 7.4L and 8.2L respectively. | |
| Compression Ratio | 8.0:1 / 8.6:1 | Specified compression ratios for 7.4L and 454/502 Magnum models. | |
| Max Engine RPM | 4200-4600 / 4600-5000 | Full throttle RPM range for various models. | |
| Oil Pressure (2000 RPM) | 30-70 PSI (207-483 kPa) | Standard oil pressure at 2000 RPM. | |
| Min. Battery Requirements | 450 CCA / 550-650 CCA | Minimum cold-cranking amps for reliable starting. |
Professional Workshop Service Manual & Technical Specifications
MerCruiser GM V-8 Engine Service Manual (1985-1989) - Number 16
Engine-Type: GM V-8 Inboard/Sterndrive // Maintenance-Category: Marine Engine // Technical-Scope: Comprehensive Overhaul & Repair Procedures.
Detailed Coverage of MerCruiser GM V-8 Engines (1985-1989 Models) This service manual provides in-depth procedures for the disassembly, inspection, assembly, and adjustment of MerCruiser GM V-8 marine engines. It is designed to aid dealers and service mechanics in repairing and tuning these engines, ensuring optimal performance and longevity.
Key Systems and Components Documented:
- Engine Identification: Understanding engine codes and serial numbers.
- Torque Specifications: Essential torque values for critical engine components.
- Lubricants/Sealants/Adhesives: Recommended fluids and sealants for proper assembly.
- Engine Specifications: Detailed mechanical specifications for 7.4L, 454 Magnum, and 502 Magnum engines.
- Cylinder Head: Information on identification, removal, installation, cleaning, and inspection.
- Valve Train: Procedures for valve assembly, grinding, and adjustment.
- Pistons & Connecting Rods: Specifications and inspection procedures.
- Crankshaft: Details on main bearings, journals, and runout.
- Lubrication System: Explains oil flow and component lubrication.
- Troubleshooting Guide: Addresses common engine issues and their causes.
Featuring a modular arrangement of detailed sections, this manual covers everything from basic engine identification to complex component repair. It documents torque specifications necessary for correct assembly and provides comprehensive system overviews.
Included Technical Documentation: This manual details procedures for the engine, fuel system, cooling system, electrical system, and drives. It includes specific torque values for engine mounts and other critical fasteners, ensuring proper installation and alignment. The manual also provides troubleshooting guidance for common engine performance issues.
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