$1,810.00
The 2025 Yamaha F4 delivers 4HP of smooth four stroke power from Yamaha’s record-setting 139cc OHV platform — 59 lbs, F-N-R tiller shifting, dual fuel tank capability, and decompression-assisted starting. A favorite for tenders, RIBs, jon boats, and small fishing boats. In stock and ready to ship.
Yamaha F4 2025: Efficient 4HP Four Stroke for Tenders and Small Boats
The 2025 Yamaha F4 carries forward Yamaha’s 139cc single-cylinder OHV four stroke — the engine family famous for a Guinness World Record 67.27 miles on a single gallon of gas. It makes 4HP at 4,500 rpm, weighs 59 lbs in the 15″ shaft configuration (20″ available), and pairs a tiller handle with Forward-Neutral-Reverse shifting, 180° steering, and a balanced twist-grip throttle. The integral 0.29-gallon (1.1L) tank switches to an external fuel tank via the factory-included connection tap, and the decompression-assisted recoil starter with start-in-gear prevention makes every start easy and safe. For 2025 buyers comparing the small horsepower class, the F4 remains the efficiency benchmark.
Key Features of the Yamaha F4 (2025 Model Year)
- 139cc OHV single-cylinder four stroke — world-record fuel efficiency pedigree
- 59 lbs dry (15″ shaft) — carrying handles, resting pads, true one-person handling
- F-N-R gear shifting — proper reverse with a large, accessible shift handle
- Dual fuel capability — 1.1L internal tank + switchable external connection (tap included)
- Decompression-assisted manual start — with start-in-gear prevention
- 6-amp alternator output — optional charging kit enables battery charging
- Easy Storage Oil Retention System — leak-free on-side storage
- CDI ignition, CARB 3-Star — reliable and 50-state legal
Specifications
- Engine Type: 1-cylinder, OHV four stroke, carbureted
- Displacement: 139cc
- Horsepower: 4 HP at 4,500 rpm
- Full Throttle RPM Range: 4,000–5,000
- Bore x Stroke: 62 x 46mm
- Compression Ratio: 8.9:1
- Starting: Manual (recoil) with decompression device
- Steering: Tiller, 180°, twist-grip throttle, F-N-R shift
- Shaft Length: 15″ (S) / 20″ (L)
- Fuel: Unleaded gasoline, minimum 87 octane
- Fuel Tank: Internal 0.29 gal (1.1L) + external tank compatible
- Alternator: 6 Amp at W.O.T. (charging kit sold separately)
- Dry Weight: From 59 lbs
Benefits
You get real reverse gear, all-day fuel range with an external tank, and the easiest pull-start in the class — in a package light enough to carry down a dock solo. Four stroke operation means no premixing, low noise at trolling speed, and sip-not-gulp fuel consumption that made this platform a world record holder.
Applications
Larger tenders and RIBs, 10–12 ft jon boats, aluminum fishing skiffs, square-stern canoes, and sailboat auxiliary power (20″ shaft). Same weight, more speed? Step to the Yamaha F6 2025. Lighter and simpler? The Yamaha F2.5 2025.
Compare Model Years
See the Yamaha F4 2024 and Yamaha F4 2026, browse all Yamaha Outboards, or read the Yamaha brand guide.
Frequently Asked Questions
What’s the price of the 2025 Yamaha F4?
The 2025 Yamaha F4 is priced at $1,810 and is in stock.
Does the F4 2025 have reverse gear?
Yes — full Forward-Neutral-Reverse shifting via a large tiller-side shift handle.
How far can the F4 go on fuel?
The 139cc platform set a Guinness World Record at 67.27 statute miles on one gallon; with the external tank option, range extends dramatically for real-world use.
How heavy is the 2025 F4?
From 59 lbs dry (15″ shaft); approximately 61 lbs for the 20″ shaft.
What boats suit the Yamaha F4?
Larger tenders, RIBs, jon boats, small aluminum fishing boats, and sailboats needing auxiliary power.
| Brand | Yamaha |
|---|---|
| Model | F4 |
| Model Year | 2025 |
| Horsepower | 4 HP |
| Engine Type | 1-Cylinder OHV Four Stroke, 139cc |
| Starting System | Manual (Recoil) with Decompression |
| Fuel Type | Unleaded Gasoline (min 87 octane) |
| Shaft Length | 15" (S) / 20" (L) |
| Steering | Tiller, 180°, F-N-R Shift |
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