General Specifications
HP / kW
100 HP / 74.5 kW
Displacement
1995 cc (121.7 cu in.)
Cylinders
4 (Inline)
WOT RPM
5000 - 6000
Weight
178 kg / 392 lbs
Drive & Lower Unit
Gear Ratio
2.08:1
Shaft Length
20"
Electrical System
Alternator Output 516 Watts
Starting System Electric
Technical Maintenance Toolkit
Verified service specifications for the Tohatsu MFS100 (4-2-1 Exhaust) (2024)
Lubrication
Engine Oil
Tohatsu 4-Stroke Oil
Oil Capacity 4.2 Liters
Gearcase Lube 950 ml
Ignition System
Spark Plug
NGK LFR6A-11
Gap Setting 0.043"
Firing Order 1-2-3-4
Performance Specs
Idle RPM 700 ± 50
WOT Range 5000-6000
Alternator 516W
Standard Maintenance Intervals
20H Break-in Service
100H Annual Tune-up
300H Water Pump & Seals
Identification
The serial number for the Tohatsu MFS100 (4-2-1 Exhaust) is typically found on a plate located on the transom bracket.
Technical Toolkit
Maintenance Compatibility
These models share common service parts with the Tohatsu MFS100 (4-2-1 Exhaust):
Model Evolution
History of the Tohatsu 100HP series over the years:
Standalone production year.
Category Discovery
Reference Data
Information compiled from Tohatsu Marine factory service manuals and original sales literature published in 2024.