Manufacturer Part Number (MPN)
MFS25DEFS
Marine Specialist Insight: The Tohatsu MFS25DEFS (MPN MFS25DEFS) is the lightest 3-cylinder outboard in its class. Featuring a 15-inch short shaft and Electric Start, this motor is built on a legacy of "Simpliq Technology." By utilizing Battery-Less Electronic Fuel Injection (EFI), it provides smooth, high-torque performance and exceptional fuel economy for skiffs, inflatables, and aluminum fishing boats that require maximum power in a portable frame.
The New Standard in 3-Cylinder Portability
The Tohatsu MFS25DEFS (MPN: MFS25DEFS) represents a major leap in small-engine technology. The three-cylinder SOHC powerhead provides a much smoother experience than twin-cylinder engines, virtually eliminating vibration at the tiller. With its battery-less EFI system, this 25 HP motor offers instant throttle response and consistent performance regardless of temperature or altitude, all while being significantly easier to maintain than carbureted alternatives.
Equipped with a multi-function tiller handle, the MFS25DEFS puts total control in your hand. The integrated shift lever, throttle grip with adjustable friction, and emergency stop switch are all ergonomically positioned. This model also includes a high-output 17.5A alternator, providing plenty of juice to run your marine electronics and keep your starting battery healthy throughout a long day on the water.
Technical Specifications
| Official MPN |
MFS25DEFS |
| Horsepower |
25 HP |
| Shaft Length |
15" (Short Shaft) |
| Starting System |
Electric Start (+ Manual Backup) |
| Engine Type |
3-Cylinder 4-Stroke SOHC |
| Weight |
Approx. 128 lbs (58 kg) |
| Fuel Delivery |
Battery-Less EFI |
MFS25DEFS Performance Features:
- Lightweight 3-Cylinder Design: Offers a smoother, quieter ride with more low-end torque than traditional twin-cylinder models.
- Battery-Less EFI: Optimized for easy starting and high efficiency—fuel injection that works even without a battery.
- Electric Start: Effortless ignition at the push of a button, with manual pull-start capability for peace of mind.
- 17.5 Amp Alternator: One of the highest charging outputs in its class for all your onboard accessories.
- Ultra-Low Emission: 3-Star OARB rated for clean and environmentally responsible boating.
Frequently Asked Questions
1. Does the MFS25DEFS come with a fuel tank?
Yes, the Tohatsu MFS25DEFS (MPN MFS25DEFS) includes a 6.6-gallon (25L) external fuel tank, fuel hose, and a factory-matched aluminum propeller.
2. Can I use this for salt water?
Absolutely. Like all Tohatsu outboards, it features high-grade marine aluminum alloy and a stainless steel water pump housing for superior durability in saltwater environments.
Tohatsu Outboard Specialist | Verified Marine Technical Data | MPN: MFS25DEFS
