2024 Yamaha 6HP - 15" Shaft
$1,899.00
Reynolds Boats | Reynolds' Boats | Lyme, Connecticut
Yamaha F6SMHA Engine – Compact Powerhouse
Engine Overview
- Type: Single‑Cylinder Overhead Valve (OHV)
- Bore & Stroke: 62 mm × 46 mm (2.44″ × 1.81″)
- Displacement: 139 cc
- Starting Method: Manual pull start
Shaft and Power Characteristics
- Shaft Length: 15″ (minimum)
- Propeller Horsepower: 6 hp at 5,000 rpm
- Full‑Throttle RPM Range: 4,50 ...
Yamaha F6SMHA Engine – Compact Powerhouse
Engine Overview
- Type: Single‑Cylinder Overhead Valve (OHV)
- Bore & Stroke: 62 mm × 46 mm (2.44″ × 1.81″)
- Displacement: 139 cc
- Starting Method: Manual pull start
Shaft and Power Characteristics
- Shaft Length: 15″ (minimum)
- Propeller Horsepower: 6 hp at 5,000 rpm
- Full‑Throttle RPM Range: 4,500–5,500 rpm
- Gear Ratio / Shifts: 2.08:1 with Forward, Neutral and Reverse options
Fuel and Electrical System
- Induction: Carbureted fuel system
- Alternator Output: 6 amps at Wide Open Throttle (WOT)
- Compression Ratio: 8.9:1
Durability and Warranty
- Warranty Coverage: Limited 3‑year Pleasure, 3‑year Government, 1‑year Commercial
The Yamaha F6SMHA is one of the company’s smallest portable engines. Weighing only about 37 pounds (17 kg), it features a lightweight overhead‑valve design that delivers reliable performance for light duty tasks such as powering tenders, outboards or small craft. Built‑in carrying handles and resting pads make transport effortless, while an oil‑leak prevention system allows safe on‑site storage.
Key Specifications
| Feature | |
|---|---|
| Engine Type | Single Cylinder (OHV) |
| Bore × Stroke | 62 mm × 46 mm (2.44″ × 1.81″) |
| Displacement | 139 cc |
| Shaft Length | 15″ – 20″ |
| Prop Shaft Horsepower | 6 hp at 5,000 rpm |
| Full Throttle RPM Range | 4,500–5,500 rpm |
| Gear Ratio / Shift Options | 2.08:1; Forward/Neutral/Reverses |
| Fuel Induction System | Carburetor |
| Alternator Output at WOT | 6 amps |
| Compression Ratio | 8.9:1 |
| Tilt Angle | 69° (maximum) |
| Spark Plug Model | CR6HSB |
| Starting System | manual pull start |
| Lubrication Type | wet sump; engine oil capacity 0.6 L (≈2.5 qt) |
| Cooling Method | thermostatic control |
| Ethanol Blend Limit | 10% maximum |
| Recommended Fuel | 87 octane gasoline |
| Weight (shortest shaft) | 27–28 kg (59–61 lb) – excludes oil, gearcase fluid and propeller unless specified |
| Warranty Terms | 3‑year Pleasure, 3‑year Government, 1‑year Commercial |
This engine’s combination of compact size, efficient power delivery and dependable construction makes it ideal for portable marine applications, recreational outboard use or any lightweight propulsion requirement.
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.