2025 Yamaha Marine Portables 9.9 HP
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Brown's Auto & Marine | Newport, NH
2025 Yamaha Marine Portable Outboard 9.9 HP
The latest 432‑cc, 25‑hp portable outboard from Yamaha is engineered for maximum performance in a lightweight package. With its streamlined design it becomes the lightest 25‑hp engine available on water—whether you choose two‑stroke or four‑stroke models.
Key Features
- Weight: Only 126 pounds with a 15” ...
2025 Yamaha Marine Portable Outboard 9.9 HP
The latest 432‑cc, 25‑hp portable outboard from Yamaha is engineered for maximum performance in a lightweight package. With its streamlined design it becomes the lightest 25‑hp engine available on water—whether you choose two‑stroke or four‑stroke models.
Key Features
- Weight: Only 126 pounds with a 15” shaft, making transport and handling effortless.
- Shaft Options: Available in 15” and 20” lengths to suit different boats.
- Power‑to‑Weight Ratio: The design is 25% lighter than competing engines yet delivers robust performance.
- Battery‑less EFI: Modern electronic fuel injection eliminates the need for a battery, simplifying maintenance and improving reliability.
- Pull-Start System: Engineered with an automatic decompression device that reduces effort required to start manually.
- Remote Control Options: Works seamlessly with remote mechanical or tiller‑handle controls for versatile operation.
Electrical and Performance Specs
- 16‑amp alternator provides ample power for accessories.
- Variable Trolling RPM Switch (VTS®) standard on factory tiller handle models; optional Multi-Function Tiller Handle with Command Link tachometer or dash‑mounted VTS switch available.
Engine Specifications
- Cylinders: 2 cylinders, 212 cc displacement (9.9 hp @ 5500 rpm).
- Bore/Stroke: 56 mm × 43 mm.
- Compression Ratio: 9.4:1.
- Throttle Range: Full RPM from 5000 to 6000 r/min.
- Steering: Tiller with a maximum angle of ±43°.
- Ignition: CDI microcomputer for reliable starts.
Fuel and Cooling System
- Ethanol blend limit 10% max; recommended Octane 87 fuel.
- Wet sump lubrication, thermostatic cooling control.
- External Yamaha 10‑micron Fuel/Water separating filter suggested for longevity.
Dimensions and Weight
- Shaft Length: 15” or 20”.
- Tilt Angle: Up to 71°; trim range from –4° to +16°.
- Total Engine Weight: Approximately 87–93 lb (39–42 kg).
Warranty Information
The Yamaha Marine Portable Outboard comes with a limited warranty: three years for pleasure use, three years for government fleets, and one year for commercial operations.
| Condition | NEW | |
| Stock Number | 6AUKS-1086917 | |
| Year | 2025 | |
| Make | Yamaha Marine | |
| Model | Portables 9.9 HP | |
| Vehicle Type | Outboard | |
| Category | Portable | |
| VIN | 6AUKS-1086917 | |
| Engine | F9.9 SMHB | |
| Type/Use | F9.9 SMHB | |
| Propulsion Type | Powered |
| Engine | |
| Engine Type | 2 cyl |
| Engine Power | Prop Shaft: 9.9hp @ 5500rpm |
| Displacement | 212cc |
| Bore | 2.20 in (56 mm) |
| Stroke | 1.70 in. (43 mm) |
| Compression Ratio | 9.4:1 |
| Throttle | Full RPM Range: 5000 ~ 6000 rpm |
| Steering | Tiller | Angle (maximum): 43° from center, either direction |
| Exhaust | Through Propeller |
| Ignition | CDI Microcomputer |
| Oil Type | Recommended: Yamalube® 4M (See owner's manual) |
| Lubrication | Wet Sump |
| Cooling | Recommended: Thermostatic Control |
| Gear Ratio (Primary) | 2.08:1 |
| Gear Shifter | Forward, Neutral, Reverse |
| Induction | Carb |
| Spark Plug | |
| Spark Plug | BR6HS-10 |
| Electric | |
| Starter | System: Electric & Manual |
| Alternator Output, Maximum | Output at W.O.T.: 6 Amp |
| Fuel System | |
| Fuel System | Ethanol Blend Limit: 10% Maximum |
| Fuel Type | Recommended: Octane 87 | Recommended Filtration: Yamaha 10-Micron Fuel/Water Separating Filter (external) |
| Dimensions | |
| Length | Shaft: 15" - 20" |
| Dimensions | Degree of Tilt: 71° | Degree of Trim: -4° through +16° |
| Capacities | |
| Oil capacity | 0.8L |
| Weights | |
| Weight | 87 lbs (39 kg) - 93 lbs (42 kg) |
| Features | |
| Features | Intake: 4 | C.A.R.B. Rating: 3-Star |
| Warranty | |
| Warranty | Limited 3-year Pleasure, 3-year Government, 1-Year Commercial |
| Engine Power | Prop Shaft: 9.9hp @ 5500rpm |
Our 432-cc 25-hp portable outboard sports a new, streamlined, portable design and class-leading power-to-weight. In fact, it’s the lightest 25-hp outboard on the water—two-stroke or four-stroke. While its streamlined design is 25 percent lighter, it still packs exciting features like battery-less EFI. Pull-start models can now take advantage of this feature, plus the system is designed with an automatic decompression device to require even less effort for manual starting.
Features may include:
Available for remote mechanical or tiller-handle control
Only 126 pounds (15” shaft model)
Available in 15” and 20” shaft lengths
Powerful 16-amp alternator
Variable Trolling RPM Switch (VTS®) is standard when equipped with new factory-equipped tiller handle or optional Multi-Function Tiller Handle, a Command Link® tachometer or dash mounted VTS switch
Estimate Payments
Payment calculations are just estimates. Rates and terms vary day to day. Not an agreement, informational purposes only. Contact dealer for current rates, terms, and payment plans, etc.
Advertised pricing excludes applicable taxes title and licensing and are subject to change without notice. Pricing may exclude any added parts, accessories or installation unless otherwise noted. Sale prices include all applicable offers. Not all options listed available on pre-owned models. Contact dealer for details.
