Make:
Mercury Marine (Mariner)
Model:
Mariner 55 HP SeaPro
Model Variant:
SeaPro commercial outboard
Production Years Covered:
1998-2006
Engine Type:
2-stroke, water-cooled outboard
Displacement:
967 cc (59 cu in)
Bore x Stroke:
69.8 x 63.5 mm
Steering Options:
Tiller or remote
Trim System:
Power trim and tilt (if equipped)
Target Audience:
Commercial and recreational boaters
Competitive Advantage:
Robust construction, reliable performance
Key Features:
Water-cooled system, versatile controls
Cooling System:
Water-cooled
Control Options:
Tiller or remote steering
Trim System:
Power trim and tilt enhances adaptability
Engine Mechanical:
Inspection, disassembly, rebuild
Fuel System:
Carburetor overhauls, fuel pump service
Ignition System:
Troubleshooting, component testing
Electrical System:
Charging, starting, wiring diagrams
Cooling System:
Water pump impeller replacement, thermostat
Lower Unit:
Gearcase disassembly, seals, water pump
Power Trim and Tilt:
Hydraulic system service
Steering:
Tiller and remote control maintenance
Propeller:
Selection, installation, damage inspection
Maintenance:
Scheduled service, fluid checks
Specifications:
Torque values, clearances, capacities
Troubleshooting:
Diagnostic charts for common issues
Step-by-Step Repair:
Detailed, sequential instructions
Exploded Views:
Illustrations showing component assembly
Diagnostic Tables:
Symptom-based problem solving
Wiring Diagrams:
Electrical schematics for various circuits
Technical Depth and Parts
Technical Depth:
Professional-grade, suitable for technicians and DIYers
Parts Information:
Part names and numbers where applicable
Special Tools:
References to required tools
Safety Procedures:
Precautions highlighted throughout
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Service Intervals:
Per manufacturer schedule (e.g., 100-hour or annual)
Fluid Specifications:
Gearcase lubricant, 2-stroke oil
Spark Plug:
N/A - not specified
Fuel Mixture:
50:1 gas/oil
Impeller Replacement:
Regular inspection recommended
Common Wear Items:
Water pump impeller, spark plugs, anodes
Known Issues:
N/A - not specified
Winterization:
Drain and fog
Torque Specs:
Included in manual
Manufacturer:
Mercury Marine (Brunswick Corporation)
Model Evolution:
Part of SeaPro commercial series
Production Location:
Fond du Lac, Wisconsin, USA (Mercury Marine)
Heritage:
Mercury Marine founded 1939, leader in outboard engines
