Make:
Mercury Marine / Mariner
Model:
Mariner 50 HP 4-Stroke Outboard
Model Variant:
50 HP FourStroke (includes Bigfoot gearcase option)
Production Years Covered:
2001-2006
Engine Type:
4-stroke, in-line 4-cylinder, water-cooled
Displacement:
59.0 cu in (967 cc)
Horsepower:
50 HP at 5500-6000 RPM
Manual Type:
Factory Service Repair Manual
Target Audience:
Boat owners and marine technicians performing maintenance and repairs
Brand Heritage:
Mercury Marine, a division of Brunswick Corporation, is a leading manufacturer of marine propulsion systems
Advantage:
Factory-authorized procedures and specifications; essential for correct service and repair
Comprehensive Coverage:
Engine, fuel, ignition, electrical, power trim/tilt, gearcase
Extensive Illustrations:
Hundreds of diagrams and photos
Color Wiring Diagrams:
Included for accurate electrical troubleshooting
Step-by-Step Instructions:
For maintenance, overhaul, and troubleshooting
Engine Systems:
Fuel, ignition, electrical, power trim and tilt, lubrication, cooling
Mechanical Systems:
Powerhead, cylinder head, block, gearcase (standard and Bigfoot)
Procedures:
Maintenance, troubleshooting, overhaul, adjustment, repair
Page Count:
Hundreds of pages
Manual Type:
Factory Service Repair Manual
Delivery Method:
Instant download
Fuel System:
Carburetor, fuel pump, fuel lines, filters, tank
Ignition System:
CDI, spark plugs, ignition coil, stator, trigger
Electrical System:
Battery, starting system, charging system, wiring
Power Trim and Tilt:
Pump, cylinders, valves, switches, relays
Lubrication System:
Oil pump, oil filter, oil pan, lines
Cooling System:
Water pump, impeller, thermostat, passages
Powerhead:
Cylinder head, block, pistons, crankshaft, camshaft
Gearcase:
Standard and Bigfoot gear housings, gears, bearings, seals
Maintenance:
Scheduled service, fluid changes, filter replacement
Troubleshooting:
Diagnostic charts, symptom-based tests
Overhaul:
Engine disassembly, inspection, reassembly, tolerances
Adjustments:
Idle speed, throttle cable, shift linkage, trim/tilt
Repair:
Component replacement, seal and gasket installation
Specifications:
Torque values, clearances, capacities, pressures
Diagrams:
Exploded views, flow charts, color wiring diagrams
Photos:
Step-by-step procedural images
Part Numbers:
Included for many components
Illustrated Parts:
Exploded views with part references
Special Tools:
Listed where required
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
Engine Type:
4-stroke, in-line 4-cylinder
Displacement:
59.0 cu in (967 cc)
Bore x Stroke:
2.56 x 2.95 in (65 x 75 mm)
Horsepower:
50 HP at 5500-6000 RPM
Fuel System:
Carbureted (3 carburetors)
Cooling:
Water-cooled, thermostatic control
Ignition:
CDI (Capacitor Discharge Ignition)
Full Throttle RPM:
5500-6000
Idle RPM:
650-750 (in gear)
Fuel Type:
Unleaded gasoline, 87 octane minimum
Oil Type:
Marine 4-stroke engine oil, API certification
Type:
Forward-Neutral-Reverse gearcase
Gear Ratio:
2.00:1 (standard)
Lubrication:
Gear lube, capacity approximately 0.6 L
Bigfoot Gearcase:
Available, with lower gear ratio for heavy loads
Gear Ratio:
2.33:1 (Bigfoot)
Shift Mechanism:
Mechanical cable control
Propeller Shaft:
Splined, stainless steel
Water Pump:
Impeller type, in gearcase
Break-In Service:
After first 20 hours
Oil Change:
Every 100 hours or annually
Spark Plugs:
Every 100 hours
Water Pump Impeller:
Every 300 hours or 3 years
Gear Lube:
Every 100 hours or annually
Engine Oil:
Mercury Marine 4-Stroke Oil, 10W-30
Gear Lube:
Mercury Gear Lube, SAE 90
Fuel:
Unleaded 87 octane minimum
Common Wear Items:
Water pump impeller, spark plugs, fuel filters
Corrosion:
Anodes require regular inspection and replacement
Carburetor:
May require cleaning and synchronization
Manufacturer:
Mercury Marine (Brunswick Corporation)
Mariner Brand:
Introduced for international markets
Production Years:
2001-2006
Displacement:
59.0 cu in (967 cc)
Successor:
Updated models with electronic fuel injection
Manufactured In:
Fond du Lac, Wisconsin, USA
