2023 Yamaha 4HP - 15" Shaft
New In Stock | Category: Outboard Motors | Brand: Yamaha
$2,070.00
Small Boat Exchange | Shelburne, Vermont
Discover the lightweight power of the 2023 Yamaha F4 HP SMHA Outboard Engine – a portable powerhouse that delivers smooth, quiet performance while staying easy to handle.
Key Features
- Engine Type: Single‑cylinder OHV engine with a 139 cc displacement (62×46 mm bore × stroke).
- Power Output: 4 HP at 4500 RPM, full throttle range of 4000–5000 RPM.
- S ...
Discover the lightweight power of the 2023 Yamaha F4 HP SMHA Outboard Engine – a portable powerhouse that delivers smooth, quiet performance while staying easy to handle.
Key Features
- Engine Type: Single‑cylinder OHV engine with a 139 cc displacement (62×46 mm bore × stroke).
- Power Output: 4 HP at 4500 RPM, full throttle range of 4000–5000 RPM.
- Shaft Length Options: Available in 15‑inch and 20‑inch configurations.
- Weight: Only 59 lb (27 kg) for the shortest shaft length; manual start system with ergonomic twist‑grip throttle.
- Fuel System: Carbureted induction, optional external tank for extended range.
- Lubrication: Wet sump pressurized oil delivery ensures reliable operation in wet conditions.
- Cooling: Thermostatic control keeps the engine running efficiently.
- Alternator: 6‑amp output for powering accessories or charging batteries.
- Warranty: Limited 3-year Pleasure, 3-year Government and 1-year Commercial coverage.
Performance & Efficiency
The F4’s compact design belies its power. It has earned a Guinness world record for fuel efficiency – traveling over 67 statute hours on just one gallon of gas. The engine’s CDI ignition, balanced crankshaft and optimized exhaust system provide smooth acceleration while keeping noise to a minimum.
Reliability & Durability
- Corrosion Protection: Coated with YDC‑30 alloy and Phaze Five™ electro‑deposited paint for long‑lasting resistance in saltwater environments.
- Durable Construction: 8.9:1 compression ratio, robust gear set (2.08 : 1), forward–neutral–reverse shifting with a built‑in decompression device for effortless starts.
User Convenience
- Easy Storage: Oil retention system prevents leaks during on‑side storage.
- Maneuverability: 180° steering capability (360° in the smaller F2.5) and a twist‑grip throttle allow precise handling even in tight spots.
- Portability: Front and rear handles, light weight, and optional short shaft make it simple to transport on trailers or boats.
Specifications Summary
- Bore × Stroke: 62 × 46 mm (2.44 × 1.81 in.)
- Displacement: 139 cc
- Shaft Length: 15 inches (available also as 20)
- Weight: 27 kg (59 lb) – no oil, gearcase or propeller included.
- Fuel Type: Octane 87; up to 10% ethanol blend allowed.
- I/O Capacity: Engine oil 0.6 L; carburetor with factory‑selected setting for low emissions.
The Yamaha F4 outboard engine combines exceptional efficiency, rugged durability and user-friendly design – making it the ideal choice for small boats that demand reliable power without bulk or complexity.
| Engine Power | 4 |
2023 Yamaha F4 HP SMHA Outboard Engine
New In Box
Weight: 60 lbs
Manual Start
New In Box
Weight: 60 lbs
Manual Start
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.