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Tohatsu MFS25CS 25HP – EFI FourStroke 15-Inch Shaft
Tohatsu MFS25CS 25HP battery-less electronic fuel injection architecture manages a large-displacement 500 cc inline three-cylinder block, supplying severe torque performance alongside an active 17.5-amp high-output marine alternator loop.
- 15-inch short shaft fits low transoms
- Trochoid pump system protects internal components
- 30.5 cu in block maintains towing
- 12V 17.5A output supports heavy electronics
- 58 kg dry build optimizes stern balance
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Description
Tohatsu MFS25CS EFI FourStroke 15-Inch Marine Outboard Motor
Direct glass-bridge integration defines the Tohatsu MFS25CS manual start tiller outboard motor, engineered specifically to handle light mechanical loads across premium skiffs, aluminum jons, and coastal utilities while establishing an outstanding foundation for a high output marine outboard network. The standard 15-inch short shaft layout delivers exceptional hydrodynamic tracking stability on standard transoms, matching the 25hp propulsion rating perfectly at a targeted 5500 operating RPM. Operating smoothly through a broad 5000-6000 full throttle range, this premium system ensures responsive acceleration in rough offshore perimeters.
Running safely off restricted onboard energy reserves is guaranteed by the advanced battery-less Electronic Fuel Injection grid, delivering clean power to sensitive electronics while protecting every low amp boat accessory onboard. Maneuvering in restricted marina waterways is simplified through a manual start tiller mechanism working alongside a manual 6-position trim network. Weighing 128 lbs, this performance-optimized 500 cc inline 3-cylinder outboard manages internal friction with a thermostatically controlled cooling path and a trochoid pump lubrication layout driving a high-amperage 17.5A charging system and a 2.17:1 gear casing.
Key Features of Tohatsu MFS25CS:
- Advanced five hundred cc inline three cylinder four stroke engine design
- Reliable twenty five horsepower output at peak fifty five hundred RPM
- Compact transom clearance tracking layout with fifteen inch short shaft
- High output twelve volt seventeen point five amp alternator charging loop
- Ergonomic tiller handle integrating complete forward neutral reverse gear shifts
- Precision cut two point seventeen gear ratios scaling propulsion velocity
- Digital CD ignition paths ensuring immediate effortless manual pull starting
- Trochoid oil pump system driving a large one point eight quart oil reservoir
- Six position manual trim setups optimizing planning vectors over swells
- Factory standard two year limited warranty protecting internal mechanical networks
Thermal Dynamic Performance Analysis
Hydrodynamic gearcase profiles reduce underwater drag metrics across extreme operational limits. This advanced lower unit shape delivers clean water flow to the propeller blades, maximizing reverse thrust authority during precision docking procedures. Internal water cooling jackets control operating temperatures, stabilizing power conversion efficiency while preventing heat soak conditions within this fully saltwater corrosion resistant motor package.
BRP Comprehensive Standard Warranty
A two year engine and corrosion warranty provides long term investment safety across harsh coastal saltwater jurisdictions. This factory protection policy remains non-declining throughout the entire coverage term, ensuring immediate access to authorized replacement parts and certified marine technician labor. Owners guarantee vessel operational readiness, mitigating high hour depreciation costs under intense recreational or commercial usage.
Transom Integration Optimization
Vessels measuring 14 to 18 feet configured with standard transom setups represent the ideal structural layout matching for single manual start tiller installations. This system coordinates perfectly with standard clockwise engines, balancing lateral displacement forces along extended hull configurations. The integrated dual-axis rigging design keeps clean transom walkways, offering excellent safety attributes for offshore tournament boats and sport utilities.
Tohatsu MFS25CS 25HP - EFI FourStroke 15-Inch Shaft Specs
| Engine type | Inline 3-Cylinder SOHC |
| Displacement | 500 cc (30.5 cu in) |
| Bore x stroke | 61 x 57 mm (2.40 x 2.24 in) |
| Horsepower | 25hp @ 5500 RPM |
| Full-throttle rpm range | 5000 - 6000 RPM |
| Compression ratio | N/A |
| Fuel induction | Electronic Fuel Injection (EFI) |
| Recommended fuel | 87 Octane |
| Ignition | Digital CD Ignition |
| Alternator output | 12V 210W 17.5A |
| Gear ratio | 2.17:1 |
| Gear shift | Forward, Neutral, Reverse |
| Shaft length | 15 inch |
| Dry weight | 128 lbs (58 kg) |
| Controls | Manual Start Tiller |
| Steering | Tiller |
| Trim and tilt | Manual (6 positions) |
| Exhaust | Through Propeller |
| Cooling system | Water Cooled w/ Thermostat |
| Lubrication | Trochoid Pump |
| Oil capacity | 1.8 Quarts (1.7 Liters) |
| Emissions rating | EPA 2013 / C.A.R.B. 3-Star |
What's in the Box
- 1x MFS25CS 25HP 3-Cylinder EFI Engine Unit
- 1x Multi-Pin Primary Rigging Electrical Wire Harness
- 1x External 6-Gallon Fuel Tank with Primer Hose
- 1x Aluminum Standard 3-Blade Propeller
- 1x Onboard Manual Pull-Rope Recoil Backup
- 1x Fresh-Water Onboard Flush Fitting Port
- 1x User Manual
Tohatsu MFS25CS 25HP Outboard FAQ
What setup steers the Tohatsu MFS25CS?
Tiller handle steering controls all physical navigation adjustments on the portable Tohatsu MFS25CS outboard motor. This integrated layout houses the throttle grip and shifting mechanisms directly on the handle to supply immediate, close-quarters control. It makes the engine highly intuitive to drive when backing into tight slips or maneuvering small fishing perches.
How heavy is a Tohatsu MFS25CS?
The dry weight of the Tohatsu MFS25CS is exactly 128 lbs before adding engine oil. Small boat builders must check this 128-pound weight to ensure light utility transoms do not draft too deep in the stern water. This lightweight profile makes it an excellent choice for auxiliary kicker setups or inflatable dinghy operations.
What operational performance baselines run this motor?
Running an electronic fuel injection system inside a 5000-6000 full throttle range, this unit utilizes these technical specifications:
| Technical Component | Certified Operational Parameters |
|---|---|
| Internal Displacement | 500 cc (30.5 cu in) total volume generated by an Inline 3-Cylinder SOHC four-stroke architecture layout |
| Drive Gearing | 2.17:1 transmission gear reduction matching standard compact propeller layouts with a forward-neutral-reverse gear shift |
| Charging Output | 12V 210W 17.5A alternator output charging loop pre-installed to support on-board boat electronics maintenance fields |
| Extension Sizing | Short 15-inch shaft casing length paired with a 6-position manual trim and tilt bracket assembly |
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