MFS115A - Outboard motor Tohatsu - Free user manual and instructions
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| Product Type | Outboard Motor |
| Brand | Tohatsu |
| Model | MFS115A |
| Power Output | 115 HP (85.8 kW) |
| Engine Type | 4-stroke, DOHC |
| Displacement | 1,996 cc (121.8 cu in) |
| Number of Cylinders | 4 |
| Starting System | Electric |
| Weight (dry) | 185 kg (408 lbs) |
| Fuel Supply | Fuel pump with primer |
| Fuel Type | Unleaded gasoline (min. 87 octane) |
| Oil Type | SAE 10W-30 (API SL or higher) |
| Fuel Capacity (external tank) | Standard 25 L (6.6 gal) or larger |
| Trim System | Power trim and tilt |
| Gear Shift | Forward, neutral, reverse |
| Steering | Remote or tiller (depending on model) |
| Cooling System | Water-cooled with thermostat |
| Alternator Output | 12V, 20A (output varies) |
| Recommended Maintenance | Every 100 hours or 12 months |
| Safety Features | Kill switch lanyard, tilt lock, warning horn |
| Parts and Repairability | Authorized Tohatsu dealers or online |
Frequently Asked Questions - MFS115A Tohatsu
What is the recommended break-in procedure for the Tohatsu MFS115A?
During the first 10 hours, vary engine speed between 2000 and 4000 RPM, avoid full throttle for more than 5 minutes, and use a proper oil-to-fuel ratio if premixing (none required for 4-stroke). Check your manual for specific details.
How do I winterize my Tohatsu MFS115A outboard motor?
For winter storage, stabilize the fuel, run the engine to circulate stabilized fuel, change the gear oil, fog the cylinders, and store the engine upright. Consult the manual for exact steps.
What type of oil should I use for the Tohatsu MFS115A?
Use SAE 10W-30 oil that meets API SL or higher. The engine does not require oil mixing as it is a 4-stroke; oil is added to the crankcase separately.
How often should I change the gear oil on my MFS115A?
Change the gear oil after the first 20 hours of operation and every 100 hours or annually thereafter. Use Tohatsu gear oil or equivalent.
What is the fuel requirement for the Tohatsu MFS115A?
Use unleaded gasoline with a minimum octane rating of 87. Avoid ethanol blends above 10% (E10). No oil mixing is needed in the fuel.
How do I troubleshoot an engine that won't start?
Check the kill switch lanyard, ensure fuel is on and primed, battery connections are clean and tight, and the fuel filter is not clogged. Also verify that the gear shift is in neutral.
What is the recommended maintenance schedule?
After 20 hours: check torque of bolts, change gear oil. Every 100 hours or yearly: engine oil change, replace spark plugs, inspect fuel system, water pump impeller, and thermostat.
Can I use a different propeller on my MFS115A?
Yes, you can select a propeller based on your boat and usage. Consult a dealer for pitch and diameter recommendations to achieve optimal RPM at full throttle.
How do I flush the engine after use in saltwater?
Attach a garden hose to the flush port (if equipped) or use ear muffs. Run the engine at idle for 5-10 minutes with fresh water to remove salt deposits.
What safety features does the Tohatsu MFS115A have?
It includes a kill switch lanyard that stops the engine if the operator falls overboard, a tilt lock to prevent accidental tilt-up, and an engine overheat warning system.
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USER MANUAL MFS115A Tohatsu
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Product information
Brand : Tohatsu
Model : MFS115A
Category : Outboard motor