Model:
Outboard 115B / 140B
Model Variant:
115B, 140B (mid-range 4-cylinder 2-stroke outboards)
Production Years Covered:
2008 model year
Document Type:
Genuine Yamaha parts catalogue
Engine Family:
Yamaha mid-range inline 4-cylinder 2-stroke outboard
Typical Use:
Recreational and light commercial marine craft
Variant Differentiation:
115B and 140B share architecture; output rating differs
Target Audience:
Boat owners, marine technicians, and marine service shops
Segment:
Mid-range outboard power for runabouts, pontoons, and utility boats
Purpose:
Accurate identification and sourcing of genuine Yamaha replacement parts
Parts Identification:
Exploded diagrams with part numbers for all major assemblies
Coverage:
Powerhead, fuel, oil, electrical, mid-section, and drive components
Original Equipment:
All parts listed are original Yamaha factory components
Durability Focus:
Engineered for reliable performance and long service life
Manual Type:
Parts catalogue (illustrated parts list)
Delivery Method:
Instant download
Top and Bottom Cowlings:
Covers
Coverage Areas (continued)
Cylinder and Crankcase:
Covers
Crankshaft and Piston:
Covers
Electrical Components:
Covers
Power Trim and Tilt:
Covers
Remote Control Assemblies:
Covers
Intended Use:
Part lookup, ordering, and assembly reference
Page Count:
N/A - not specified in available source data
Cylinder and Crankcase:
Complete assembly breakdown with part numbers
Crankshaft and Piston:
Crankshaft, connecting rods, pistons, and bearings
Fuel System:
Carburetor, fuel pump, and fuel lines
Oil System:
Oil injection system components
Electrical Components:
Starter, stator, CDI, ignition coils, and wiring
Drive Systems:
Lower unit, gears, propeller shaft, and seals
Power Trim and Tilt:
Trim cylinders, pump, and relay assemblies
Steering:
Steering bracket and related hardware
Remote Control Assemblies:
Control box, cables, and linkages
Cowlings:
Top and bottom cowling panels and fasteners
Procedures and Technical Depth
Assembly Diagrams:
Exploded views with part numbers and quantities
Part Identification:
Genuine Yamaha part numbers for direct ordering
Assembly Sequence:
Diagram references support reassembly
Technical Depth:
Component-level parts detail; not a service or repair manual
Parts Type:
Original factory components
Part Numbering:
Yamaha OEM part numbers listed
Quantities:
Per-assembly quantities included
Supersession:
N/A - availability not confirmed in available source data
Mid-Section:
Mounting and exhaust housing components
Gaskets and Seals:
Included where shown in assemblies
Fasteners:
Bolts, nuts, and washers listed by assembly
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
Standard:
Forward, neutral, and reverse gearcase
Type:
Shaft-driven lower unit
Gear Ratio:
N/A - not confirmed in available source data
Control Type:
Remote control
Trim System:
Power trim and tilt
Propeller Shaft:
Covered in drive system parts list
Seals and Bearings:
Listed within lower unit assembly
Wheelbase:
N/A - outboard motor, no wheelbase
Length:
N/A - exact dimensions not confirmed in available source data
Shaft Lengths:
N/A - available lengths not confirmed in available source data
Curb Weight:
N/A - exact weight not confirmed in available source data
Break-In:
Follow Yamaha break-in schedule for new or rebuilt engines
Gear Oil:
Check and change per Yamaha owner maintenance schedule
Water Pump Impeller:
Inspect and replace per Yamaha service schedule
Spark Plugs:
Inspect and replace per Yamaha service schedule
Fluids and Specifications
Fuel:
Use fuel grade specified by Yamaha for this model
Engine Oil:
Use Yamaha-recommended 2-stroke outboard oil
Gear Oil:
Use Yamaha-recommended lower unit gear oil
Fluid Capacities:
N/A - capacities not confirmed in available source data
Water Pump Impeller:
Routine wear item
Anodes:
Inspect and replace as needed for corrosion protection
Fuel Filters:
Replace periodically
Spark Plugs:
Routine wear item
Gaskets and Seals:
Replace when servicing assemblies
