1998 Mercury Marine 200/225 Optimax DFI Service Manual
Diagnostic procedures, removal, and maintenance for 200/225 Optimax DFI: powerhead, fuel system, electrical, and trim. 90-855348R1
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Sample pages from the 1998 Mercury Marine 200/225 Optimax DFI Service Manual manual
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Models Covered & Key Technical Specifications
Mercury Marine 200/225 Optimax (90-855348R1) — 1998
Optimax Series Collection | Service Manual Portfolio.
- System Electrical Load: 30 Amperes @ 750 RPM is set to the rated output Mapping.
- Maximum Climate Parameters: For optimal operation, 75°F (25°C) defines the environmental limit Configuration.
- Measured Velocity Specs: Standard Ratio All Models – signifies the gear ratio standardization Benchmarks.
- Published Output Quality: 200–225 horsepower (149.2–167.8 kW) corresponds to the rated maximum performance Range.
- Authorized Fill Levels: 28.0 fl. oz. (828.0ml) requires the gearcase oil capacity Sequences.
- Technical Power Draw: 8 – 10 PSI Minimum @ 5000 RPM establishes the minimum operating pressure Baseline.
Professional Workshop Service Manual & Technical Specifications
Mercury Marine 200/225 Optimax (90-855348R1) — 1998 Service Manual
Subsystem-Focus: 1998 Mercury Marine 200/225 Optimax // Model-Portfolio: 1997/1998 Outboard Motor / DFI // Subsystem-Focus: Electrical Systems
| Specification | Operational-Logic | Calibration-Standards |
|---|---|---|
| Horsepower | 200–225 HP | 149.2–167.8 kW |
| Outboard Weight | 507.0–512.0 lbs | 230.0–232.0 kg |
| Cylinder Bore | 3.6265 in. | 92.1131 mm |
| Stroke | 3.00 in. | 76.2mm |
| Gearcase Capacity | 28.0 fl. oz. | 828.0ml |
| Air Pressure Regulator | 80 psi | N/A |
Technical chapters are organized around the following key areas:
Section 1: Important Information
This section details specifications, maintenance schedules, general information, and outboard installation procedures.
Section 2: Electrical
Covers ignition systems, charging systems, starter systems, and wiring diagrams.
Section 3: Fuel System
Details the fuel pump, direct fuel injection, oil injection, and emissions control systems.
Section 4: Powerhead
Includes information on the cylinder block assembly and cooling system.
Section 5: Mid-Section
Covers clamp/swivel brackets and drive shaft housing, as well as power trim.
Section 6: Lower Unit
Provides details on right and left-hand rotation lower units.
Section 7: Attachments/Control Linkage
Covers the various attachments and control linkages for the outboard motor.
Accurately requiring torque specifications for proper bolt stretch prevention, this manual documents the necessary procedures for component replacement and system servicing.
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