The Mercury 3.5hp FourStroke (3.5MH) is the ultimate lightweight powerhouse for small tenders, canoes, and inflatable boats. Weighing only 38 lbs (17 kg), this engine offers incredible portability without compromising on durability. Featuring a 15-inch short shaft and 360-degree steering, the 3.5MH provides exceptional maneuverability, making it a reliable companion for recreational boaters who need efficient, smoke-free operation in a compact package.
Technical Specifications
| Model Number / MPN |
3.5MH |
| Horsepower |
3.5 HP (2.6 kW) |
| Shaft Length |
15 Inches (Short Shaft) |
| Engine Type |
1-Cylinder / 4-Stroke OHV |
| Displacement |
85 cc (5.2 cubic inches) |
| Starting System |
Manual Recoil Start |
| Fuel Tank |
Integral 0.3 Gallon (1.1L) |
| Dry Weight |
Approx. 38 lbs (17.2 kg) |
Compact Efficiency, Built to Last
- 360-Degree Steering: Offers full thrust in any direction, providing maximum maneuverability for tight docking and precision navigation.
- Integrated Fuel Tank: Features a built-in overhead fuel tank with a gravity-feed system, eliminating the need for external fuel lines.
- Automatic Decompression: Significantly reduces cylinder pressure during pull-start, making the 3.5MH incredibly easy to start with one hand.
- Forward-Neutral Shifting: A front-mounted shift lever provides simple gear control for intuitive operation.
- Large Carrying Handle: Balanced center of gravity and ergonomic handle design make it one of the easiest outboards to transport manually.
The Perfect Portable Solution
The Mercury 3.5MH is the go-to outboard for boaters who prioritize simplicity and portability. Its quiet 4-stroke operation means no mixing of fuel and oil, and significantly lower emissions compared to traditional 2-stroke engines. Protected by Mercury’s 4-Front Corrosion system and featuring stainless steel internal components, this 3.5hp short shaft motor is built to handle both freshwater and coastal adventures for years to come.
Frequently Asked Questions
1. How do I put the motor in reverse?
The 3.5MH features 360-degree steering. To reverse, simply turn the engine 180 degrees—this provides full power and steering control in the opposite direction.
2. What type of fuel should I use?
We recommend using fresh, unleaded gasoline (minimum 87 octane) with no more than 10% ethanol (E10). Using a fuel stabilizer is also highly recommended for long-term storage.
Marine Equipment Specialist | Genuine Provider | Genuine Mercury Parts & Accessories
