Target audience:
Technicians, marine mechanics and DIY owners maintaining the Yamaha 20CMH(6A91) outboard
Model class:
Portable 20 hp-class outboard motor
Primary advantage:
Factory parts catalogue identifies every component of the 20CMH(6A91) by exploded diagram and part number
Use case:
Sourcing replacement parts and confirming fitment before ordering
Reliability focus:
Supports continued operation and longevity of the outboard motor
Diagram-based parts listing:
Covers top and bottom cowlings, cylinder and crankcase, crankshaft and piston, intake, fuel, starter, generator, electrical systems, steering, control, brackets, upper and lower casings, drive units, fuel tank and repair kits
Numerical index:
Included for fast part-number lookup
Printable format:
High-quality printable document
Coverage areas:
Top and bottom cowlings, cylinder and crankcase, crankshaft and piston, intake, fuel, starter, generator, electrical systems, steering, control, brackets, upper and lower casings, drive units, fuel tank, repair kits, numerical index
Manual type:
Parts Catalogue
Page count:
N/A - not specified in the available description
Delivery method:
Instant download
Top and bottom cowlings:
Covered with parts listings
Cylinder and crankcase:
Covered with parts listings
Crankshaft and piston:
Covered with parts listings
Intake:
Covered with parts listings
Fuel system:
Covered with parts listings
Starter:
Covered with parts listings
Generator:
Covered with parts listings
Electrical systems:
Covered with parts listings
Steering:
Covered with parts listings
Control:
Covered with parts listings
Brackets:
Covered with parts listings
Upper and lower casings:
Covered with parts listings
Drive units:
Covered with parts listings
Fuel tank:
Covered with parts listings
Repair kits:
Covered with parts listings
Numerical index:
Included for locating parts by number
Ill ustration method:
Exploded diagrams with numbered callouts, typical of Yamaha parts catalogues
Part identification:
Diagrams paired with part numbers for each assembly
Technical depth:
Component-level parts identification; not a service or repair procedure manual
Procedures included:
None - parts catalogue only, no step-by-step repair procedures
Parts information:
Component listings keyed to the 20CMH(6A91) model
Print quality:
High-quality, printable document
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
Primary engine:
Yamaha 20CMH(6A91) outboard, year 2002
Engine options range:
This catalogue covers the 20CMH(6A91) variant only
Engine type:
Internal combustion
Horsepower class:
20 hp class
Fuel system:
Covered in the fuel system parts section
Displacement:
N/A - not specified in the available description
Cylinder configuration:
N/A - not specified in the available description
Cooling:
N/A - not specified in the available description
Standard transmission:
Outboard lower unit with drive shaft and gears, covered in the drive units section
Optional transmission:
N/A - no optional transmission listed for this model
Gearcase:
Lower casing and drive unit parts detailed in the catalogue
Controls:
Steering and control assemblies covered in dedicated sections
Propeller:
N/A - propeller not listed among the described catalogue sections
Wheelbase:
N/A - not applicable to an outboard motor
Overall length:
N/A - not specified in the available description
Shaft length:
N/A - not specified for this variant in the available description
Curb weight:
N/A - not specified in the available description
Dry weight:
N/A - not specified in the available description
Crash test information:
N/A - not applicable to an outboard motor
Safety ratings:
N/A - no ratings published for this component
Active features:
N/A - not detailed in the parts catalogue description
Passive features:
N/A - not detailed in the parts catalogue description
Engine safety systems:
Related electrical and control components appear in the electrical systems and control sections
Audio system:
N/A - not applicable to this outboard motor
Generator:
Charging generator parts covered in a dedicated section
Starter:
Starter components covered in a dedicated section
Electrical system:
Wiring and electrical components listed in the electrical systems section
Driver assistance:
N/A - not applicable to this outboard motor
Service intervals:
N/A - not stated in the available description; refer to the Yamaha owner's or service manual for the 20CMH(6A91)
Repair kits:
Repair kit parts are listed in a dedicated catalogue section
Common wear items:
Crankshaft and piston, intake, fuel, starter, generator, drive unit and lower casing parts are catalogued for replacement
Fluid specifications:
N/A - not stated in the available description
