Identifying your Yamaha Motor Company engine serial number is essential for maintenance, ordering parts, warranty verification, and confirming engine specifications.
Yamaha uses a structured serial number system across its outboard motors, motorcycles, ATVs, and generators.
This guide provides a complete breakdown of Yamaha engine serial numbers in table format, covering all major engine types and how to decode them.
Yamaha Engine Serial Number Identification
Yamaha outboard engines use a model code + serial number format.
Format Example:
F150TXR 6P2 X 100001
| Prefix Code | Engine Type | Description |
|---|---|---|
| F2.5 | Portable outboard | 2.5 HP four-stroke |
| F4 | Portable outboard | 4 HP four-stroke |
| F6 | Portable outboard | 6 HP four-stroke |
| F8 | Mid-range outboard | 8 HP four-stroke |
| F9.9 | Mid-range outboard | 9.9 HP four-stroke |
| F20 | Mid-range outboard | 20 HP four-stroke |
| F25 | Mid-range outboard | 25 HP four-stroke |
| F30 | Mid-range outboard | 30 HP four-stroke |
| F40 | Mid-range outboard | 40 HP four-stroke |
| F50 | Mid-range outboard | 50 HP four-stroke |
| F60 | Mid-range outboard | 60 HP four-stroke |
| F70 | High thrust outboard | 70 HP four-stroke |
| F75 | High-performance | 75 HP four-stroke |
| F90 | High-performance | 90 HP four-stroke |
| F115 | High-performance | 115 HP four-stroke |
| F130 | High-performance | 130 HP four-stroke |
| F150 | High-performance | 150 HP four-stroke |
| F175 | High-performance | 175 HP four-stroke |
| F200 | Offshore outboard | 200 HP four-stroke |
| F225 | Offshore outboard | 225 HP four-stroke |
| F250 | Offshore outboard | 250 HP four-stroke |
| F300 | Offshore outboard | 300 HP four-stroke |
| VF150 | V MAX SHO | High-output performance engine |
| VF200 | V MAX SHO | Performance series |
| VF250 | V MAX SHO | Performance series |
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Yamaha Shaft Length & Transom Codes
| Code | Shaft Length | Measurement (Approx.) |
|---|---|---|
| S | Short shaft | 15 inches |
| L | Long shaft | 20 inches |
| X | Extra long | 25 inches |
| U | Ultra long | 30 inches |
| E | Extended | 35 inches |
Yamaha Trim & Start System Codes
| Code | System Type | Description |
|---|---|---|
| M | Manual start | Pull start |
| E | Electric start | Key ignition |
| T | Power trim & tilt | Hydraulic trim system |
| P | Power tilt only | Tilt without trim |
| H | Tiller handle | Manual steering |
| R | Remote control | Console steering |
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Extended Yamaha Motorcycle Engine Codes
| Code | Model Family | Engine Configuration |
|---|---|---|
| 5PW | YZF-R1 | Inline 4-cylinder |
| 2C0 | YZF-R6 | Inline 4-cylinder |
| 1WS | MT-10 | Inline 4-cylinder |
| 2DR | MT-09 | Inline 3-cylinder |
| B67 | MT-07 | Parallel twin |
| 1TP | Tenere 700 | Parallel twin |
| 5VK | WR450F | Single-cylinder |
| 3XP | XT250 | Single-cylinder |
| 4B5 | Bolt | V-twin |
| 1CR | XSR900 | Inline triple |
Extended Yamaha ATV / UTV Model Codes
| Model Code | Model Name | Engine Type |
|---|---|---|
| YFM125 | Grizzly 125 | Single-cylinder |
| YFM400 | Kodiak 400 | Single-cylinder |
| YFM450 | Kodiak 450 | Single-cylinder |
| YFM660 | Grizzly 660 | Single-cylinder |
| YXM700 | Viking 700 (UTV) | Single-cylinder |
| YXZ1000R | YXZ1000R | Inline triple |
| YFM700R | Raptor 700R | Single-cylinder |
| YFZ450R | YFZ450R SE | Single-cylinder |
| YFM700EPS | Grizzly 700 EPS | Single-cylinder |
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Yamaha Engine Production Code Examples
| Code | Application | Description |
|---|---|---|
| 6P2 | Outboard engines | Common 150–200 HP engines |
| 6CB | Outboard engines | Offshore models |
| 3B4 | ATV engines | Utility ATV production |
| 7PB | Generators | Portable inverter series |
| 1WS | Motorcycles | High-performance engines |
| 5VK | Off-road bikes | Dirt bike engines |
Extended Yamaha Generator Engine Codes
| Model Code | Engine Type | Fuel Type |
|---|---|---|
| EF2400iSHC | Inverter | Gasoline |
| EF2800i | Inverter | Gasoline |
| EF4000DE | Conventional | Diesel |
| EF5500DE | Conventional | Diesel |
| EF6300iSDE | Inverter | Diesel |
| EF10000E | Conventional | Gasoline |
| EF12000DE | Industrial | Diesel |
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Yamaha Serial Number Character Identification
| Character Type | Meaning | Example |
|---|---|---|
| Letters | Model / year / category | F, YFM |
| Numbers | Horsepower or displacement | 150 |
| Combination | Production batch | 6P2 |
| Final digits | Unique serial sequence | 123456 |
Yamaha Engine Manufacturing Region Codes
| Code | Region | Description |
|---|---|---|
| U | USA | North American market |
| L | Europe | EU market engines |
| X | Export | International markets |
| J | Japan | Domestic Japanese models |
| A | Asia | Asian markets |
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Yamaha Engine Application Identification
| Engine Type | Prefix Example | Typical Use Case |
|---|---|---|
| Outboard | F150 | Boats / marine |
| Motorcycle | YZF-R1 | Sport riding |
| ATV | YFM700 | Off-road utility |
| UTV | YXZ1000R | Recreational off-road |
| Generator | EF2000iS | Portable power |
| Marine Inboard | 6LY2 | Commercial boats |
Yamaha Serial Number Format Variations
| Engine Category | Format Example | Structure Description |
|---|---|---|
| Outboard | F150TXR 6P2 X 123456 | Model + code + year + serial |
| Motorcycle | 1HD-123456 | Prefix + serial |
| ATV | YFM700FWA 3B4 123456 | Model + variant + serial |
| Generator | EF2000iS 7PB 123456 | Model + production + serial |
| Inboard | 6LY2-UTP 500001 | Model + variant + serial |
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Yamaha Engine Serial Number Troubleshooting
| Issue | Possible Cause | Solution |
|---|---|---|
| Serial not found | Worn or dirty plate | Clean or inspect closely |
| Mismatch with parts | Wrong model identification | Recheck prefix code |
| Year unclear | Repeating year codes | Cross-check with model year |
| Illegible digits | Corrosion or damage | Use magnification |
| Multiple numbers present | Confusion with VIN | Use engine-specific number |
What Is a Yamaha Engine Serial Number?
A Yamaha engine serial number is a unique identifier assigned to every engine. It typically includes:
- Model prefix
- Production code
- Serial sequence
This number helps determine:
- Engine type
- Manufacturing year
- Engine specifications
- Factory origin
Final Thoughts
Understanding Yamaha engine serial numbers helps you avoid costly mistakes when servicing or replacing parts. Whether you own an outboard motor, ATV, motorcycle, or generator, decoding the serial number gives you accurate engine details instantly.
By using the tables above, you can quickly identify:
- Engine type
- Production year
- Model specifications
