Manufacturer Part Number (MPN)
MFS9.9ES
Marine Engineer Insight: The Tohatsu MFS9.9ES (MPN MFS9.9ES) is a game-changer for the portable outboard market. Featuring Tohatsu's revolutionary Battery-Less Electronic Fuel Injection (EFI), this 15" short shaft model offers the reliable starting and smooth idling of fuel injection without the need for a heavy external battery. Designed for small fishing boats, tenders, and inflatables, the MFS9.9E provides class-leading fuel economy and torque in a lightweight, twin-cylinder package.
Fuel Injected Performance in a Truly Portable Design
The Tohatsu MFS9.9ES (MPN: MFS9.9ES) represents the next generation of portable power. By eliminating the carburetor in favor of an advanced EFI system, Tohatsu has removed the most common source of maintenance issues in small engines. This manual start model fires up effortlessly even after long periods of storage, regardless of temperature or altitude. The 333cc twin-cylinder engine architecture ensures a balanced, quiet ride with significantly more punch than single-cylinder alternatives.
This model features a newly designed, compact cowl that reduces overall weight while improving engine protection. The 15" short shaft is ideal for standard transoms, providing immediate thrust and agile handling. With Tohatsu’s Variable Idling Control, anglers can easily adjust trolling speeds, making the MFS9.9ES a favorite for those who demand precision on the water. Built to last, it includes a stainless steel water pump housing and multi-layer anti-corrosion protection.
Technical Specifications
| Official MPN |
MFS9.9ES |
| Engine Type |
2-Cylinder 4-Stroke SOHC |
| Fuel Delivery |
Battery-Less Electronic Fuel Injection (EFI) |
| Shaft Length |
15" (Short Shaft) |
| Starting System |
Manual Recoil |
| Dry Weight |
Approx. 95 lbs (43 kg) |
| Control Type |
Tiller Steering |
MFS9.9ES Key Performance Features:
- Battery-Less EFI: Experience the benefits of fuel injection with simple manual pull-starting and no battery required.
- Ultra-Smooth Twin Cylinder: Eliminates vibration common in single-cylinder portables for a more comfortable experience.
- Front-Mounted Shift Lever: Ergonomically placed for quick, intuitive gear changes (F-N-R).
- Variable Idling Control: Allows you to adjust trolling RPMs (750 to 1050) for perfect lure presentation.
- EPA/CARB 3-Star Rated: Environmentally friendly with industry-low ultra-low emissions.
Frequently Asked Questions
1. Do I need a battery for the fuel injection to work?
No. The MFS9.9ES uses a unique battery-less system that generates enough power during the first few inches of the pull-start to prime the EFI and fire the engine.
2. Does this motor come with an external fuel tank?
Yes, the MFS9.9ES includes a 3.1-gallon (12-liter) external fuel tank, fuel line, and a factory-fitted aluminum propeller.
Tohatsu Authorized Dealer | Verified 9.9hp EFI Data | MPN: MFS9.9ES
