This is the engine for those who don’t overplan, but simply follow the feeling. Quick to start, easy to carry, and easy to steer—the 4 hp engine makes a day on the water effortlessly simple. When you take your boat with you, it brings that feeling along.
| Engine Type | OHV |
| Cylinders | 1-cylinder |
| Fuel System | 1 carburetor |
| Displacement | 139 cm³ |
| Max Output | 2.9 kW |
| Bore X Stroke | 62.0 × 46.0 mm |
| Compression Ratio | 8.9 : 1 |
| Ignition Advance System | CDI |
| Alternator | 6 A with optional regulator |
| Weight | 750 mm |
| Width | 403 mm |
| Height | S: 1039 mm, L: 1166 mm |
| Engine Transom Height | S: 435 mm, L: 562 mm |
| Max Propeller Shaft Output | 2.9 kW |
| Fuel Throttle Operating Range | 4000 – 5000 r/min |
| Idling Speed | 1450 – 1550 r/min |
| Gear Ratio | 2.08 (27/13) |
Looking this good shouldn’t be this easy, but it is. The elegant grey cover and bold graphics give every outing a touch of Yamaha attitude. It’s sharp, modern, and made for fun—the perfect match for your next day on the water.
The compact design and large, soft-grip handle make it easy to lift, load, and launch. Whether you’re walking to the slip or moving between boats, this little engine is a dream to carry, because Yamaha knows that adventures should start effortlessly.
Take it from the car to the dock without spilling a drop. Yamaha’s smart breathing system means it can be stored lying on its front or on one of its sides: no oil leaks, no worries. Just grab it, go, and relax knowing that your boat, trunk, and deck will stay spotless.
Docking, cruising, drifting... Whatever the day brings, steering feels effortless with simple friction control and 90° turns in both directions. Adjust the throttle trim to match your pace and enjoy the steady, balanced ride Yamaha is known for, even when you’re moving at a faster pace.
When the sun sets before you’ve had enough, the lighting cable illuminates the journey ahead. With a reliable 12 V 6 A power supply, you can run lights, charge devices, or keep fishing after dark, because the best stories don’t always happen in daylight.
Quick trips are easy and hassle-free with the built-in 1.1-litre tank, giving you more room for your tackle box or cooler. Got bigger plans? Simply turn the two-way fuel valve and connect an external tank to double your range. Simple, smart, and ready to take you wherever the day leads.
Experience unbeatable reliability and performance with Yamaha’s 5-year warranty, exclusive to Europe. The warranty applies to recreational-use outboard motors from 2.5 hp up to XTO models and includes comprehensive parts and labour coverage. Keep your engine in top condition with Genuine Parts and Yamalube oil from authorized dealers, and enjoy worry-free adventures with Yamaha’s renowned quality.
Nordwall Marin finns på det anrika Bosövarvet på Lidingö. Vi har byggt, sålt, reparerat och servat både båtar och motorer ända sedan 1946. På varvet finns det även en tillbehörsbutik och vi har sommarplatser att hyra ut vid våra bryggor..