MFS8B - Outboard motor Tohatsu - Free user manual and instructions
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| Brand | Tohatsu |
| Model | MFS8B |
| Type | Outboard Motor |
| Power | 8 HP (5.9 kW) |
| Engine Type | 4-Stroke, SOHC |
| Number of Cylinders | 1 |
| Displacement | 197 cc |
| Fuel System | Carburetor |
| Starting System | Manual (recoil start) |
| Gear Ratio | 2.15:1 |
| Weight | 35 kg (77 lbs) |
| Shaft Length | 15 inches (short) or 20 inches (long) |
| Fuel Tank Capacity | 12 L (3.2 gal) external tank |
| Oil Capacity | 0.9 L |
| Cooling System | Water-cooled (thermostat regulated) |
| Ignition System | CDI (Capacitor Discharge Ignition) |
| Trim Range | -4° to 16° |
| Tilt Range | 68° |
| Steering | Tiller handle |
| Standard Propeller | 9.25 x 10 inches (aluminum) |
| Recommended Fuel | Unleaded gasoline (87 octane min) |
| Recommended Oil | SAE 10W-30 or 10W-40 (4-stroke) |
| Emissions Compliance | EPA/CARB |
| Warranty | 3 years (limited) |
Frequently Asked Questions - MFS8B Tohatsu
What type of fuel should I use for the Tohatsu MFS8B?
Use clean, fresh unleaded gasoline with a minimum octane rating of 87 (R+M/2). Avoid using gasoline containing more than 10% ethanol (E10).
What oil is recommended for the MFS8B?
Use a high-quality 4-stroke outboard oil with viscosity SAE 10W-30 or 10W-40 that meets API SE, SF, SG, SH, SJ or SL classification. The oil capacity is approximately 0.9 liters.
How do I start a cold engine?
1. Attach fuel hose and squeeze primer bulb until firm. 2. Place throttle grip in START position (fully closed). 3. Pull out choke knob fully. 4. Pull starter rope slowly until resistance is felt, then pull sharply. 5. Once engine starts, push choke knob in gradually.
What is the break-in procedure for a new motor?
During the first 10 hours: vary engine speed and avoid prolonged full throttle. For the first hour, do not exceed half throttle. For hours 2-10, do not exceed 3/4 throttle for more than 5 minutes. After 10 hours, you can operate at full throttle.
How often should I change the gear oil?
Change the gear oil after the first 20 hours of operation, then every 100 hours or once a year, whichever comes first. Use SAE 90 hypoid gear oil.
What maintenance is required after each use?
Flush the cooling system with fresh water if used in salt or dirty water. Rinse the exterior with fresh water. Check engine oil level. Tighten any loose nuts or bolts. Store the motor in a vertical position.
How do I winterize the Tohatsu MFS8B?
Run the engine out of fuel to empty the carburetor. Change engine oil and gear oil. Fog the cylinders by spraying fogging oil into the spark plug hole and pulling starter rope slowly. Store in a dry, ventilated area.
What should I do if the engine does not start?
Check fuel supply (primer bulb firm), ensure choke is engaged when cold, check spark plug connection, and verify kill switch lanyard is attached. If no spark, inspect spark plug and ignition system.
What is the correct propeller for the MFS8B?
The standard propeller is a 3-blade aluminum 9.25 x 10 inches. However, the correct pitch depends on boat weight and usage. Consult your dealer for alternate pitches.
Where can I find the serial number?
The serial number is stamped on a plate attached to the port side of the clamp bracket or on the engine block. It is needed for parts ordering and warranty service.
User questions about MFS8B Tohatsu
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USER MANUAL MFS8B Tohatsu
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Product information
Brand : Tohatsu
Model : MFS8B
Category : Outboard motor