Yamaha FourStroke Portable 2.5–25HP Outboard Motors

Lightweight Power. Effortless Portability. Proven Yamaha Reliability.

The Yamaha FourStroke 2.5–25HP Portable Outboard family is designed for boaters who need easy handling, dependable power, and fuel-efficient performance in a compact package. These small but mighty engines are perfect for dinghies, inflatables, sailboats, jon boats, and small skiffs—any vessel that requires reliable propulsion without adding unnecessary weight.

Every model is built with Yamaha’s legendary FourStroke technology, delivering quiet operation, smooth acceleration, and low emissions. From the ultralight F2.5 to the advanced F25 EFI, this lineup combines portability with serious performance so you can explore, fish, and cruise with confidence.

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Shop Small Yamaha Outboard Motors (Quick Finder)

• F2.5–F6 (Ultra-Portable) – Compact and easy to carry; ideal for dinghies, canoes, and inflatables.
• F8–F9.9 (Versatile) – Popular for sailboats and trolling applications; available in high-thrust versions for extra torque.
• F20–F25 (Feature-Rich) – EFI technology, optional electric start, and Power Tilt for small skiffs, jons, and light pontoons.

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Shaft Length Guide

Choosing the right shaft ensures correct propeller depth and performance:

• Short Shaft (S ~15”) – Most dinghies, tenders, and inflatables.
• Long Shaft (L ~20”) – Common on small skiffs and sailboats.
• Extra-Long (XL ~25”) – Select sailboats or deep transoms.

Tip: Measure from the keel to the top of your transom. If unsure, go one size up for consistent water pickup.

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High-Thrust vs. Standard (F9.9 & F25)

• High-Thrust Models (T-Series): Optimized for heavier or displacement hulls—like sailboats—using larger-diameter, lower-pitch props.
• Standard Models: Provide better top-end speed for lighter, planing hulls.

Choose based on your boat weight, hull type, and load (crew, gear, fuel).

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Starting, Controls & Features

• Manual Start: Standard on F2.5–F9.9
• Electric Start: Available on F20 and F25 models
• Tiller or Remote Steering: Most are tiller-steered; select higher-horsepower models support remote rigging
• EFI (Electronic Fuel Injection): F20/F25 models offer cleaner starts, smoother idle, and improved fuel efficiency

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Fuel Efficiency

Every Yamaha Portable Outboard is engineered to deliver maximum range on minimal fuel.

• EFI-equipped engines (F20/F25) maintain consistent burn across temperature and altitude changes.
• Smaller carbureted models (F2.5–F9.9) feature precision fuel metering for long, steady runs.

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Model Highlights

Yamaha F2.5 – Small but Mighty

Weighing under 40 pounds, the F2.5 is Yamaha’s lightest outboard—perfect for dinghies and small tenders.
Key Features:

• Under-40-lb weight for carry-on convenience
• 360° steering for full maneuverability
• Quiet, fuel-efficient FourStroke design
• Reliable manual starting

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Yamaha F6 – The Everyday Workhorse

Compact, durable, and easy to maintain, the F6 is a favorite for small skiffs and jon boats.
Key Features:

• Lightweight and portable design
• Smooth manual start
• Extended tiller handle for control
• Fuel-efficient and dependable

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Yamaha F9.9 – Sailors’ and Anglers’ Choice

The F9.9 is a proven performer for sailboats and trolling setups, available in standard and high-thrust options.
Key Features:

• High-thrust version for heavier hulls
• Smooth, quiet running with EFI precision
• Excellent auxiliary or kicker motor
• Built for long-term reliability

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Yamaha F20 & F25 – Portable with Premium Features

At the top of the portable range, these models deliver the power and refinement of larger outboards in a lightweight form.
Key Features:

• EFI for instant starts and superior efficiency
• Optional Power Tilt for easier trailering and shallow-water control
• Electric start options available
• Compact yet powerful 20–25HP performance

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Maintenance & Care

Keep your Yamaha portable running at its best with basic upkeep:

• Break-In: Follow the owner’s manual guidelines.
• Every 100 Hours / Annually: Change engine oil, filter, gear lube, and inspect spark plugs, anodes, and water pump.
• Saltwater Use: Flush with freshwater and apply corrosion protection after every trip.

PartsVu carries OEM maintenance kits, oil, filters, and corrosion-guard products to make service easy and affordable.

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Frequently Asked Questions

Q: What’s the lightest Yamaha outboard available?
A: The F2.5, weighing under 40 lbs, is the lightest and easiest to carry.

Q: Which models have electric start?
A: The F20 and F25 are commonly available with electric start options.

Q: Do these engines work in saltwater?
A: Yes—flush after use and maintain Yamaha’s corrosion protection.

Q: What’s the difference between standard and high-thrust models?
A: High-thrust versions are built for torque and pushing power, while standard models emphasize speed on lighter hulls.

Q: What type of fuel should I use?
A: Use clean, fresh gasoline; Yamaha recommends a marine fuel stabilizer for long-term storage.

Q: Are these EFI or carbureted?
A: Smaller portables (F2.5–F9.9) are carbureted; the F20 and F25 use EFI for optimal efficiency and starting ease.

Q: How much does a Yamaha F20 cost?
A: Pricing varies by options and shaft length—see the Yamaha F20 product page for live pricing and availability.

From the ultra-portable F2.5 to the feature-rich F25 EFI, Yamaha’s Portable FourStroke lineup redefines small-motor reliability. They’re light, efficient, and built to perform—proving that big capability can come in small packages. Whether you’re powering a tender, a skiff, or a sailboat, these engines make every trip effortless and worry-free.