Tohatsu MFS 25/30B Outboard Motor Service Workshop Manual

Workshop Service and Repair Manual for the Tohatsu MFS 25-30B 4 stroke outboard engines. This full workshop manual set covers every component, service and repair procedure in full Tohatsu factory specification with clear concise step by step photographs and technical drawings for both the 4 stroke motor with torque setting values throughout for fasteners and reassembly, below is an exhaustive list of the items covered within this set.

This is the most comprehensive service manual set available as used by marine engineers and boatyards the world over.

TOHATSU MFS 25-30B OUTBOARD MOTOR SERVICE MANUAL

1SERVICE INFORMATION
1 Identification (Engine Serial Number)
2 Securing of work safety
3 Tools and Instruments
4 Pre-delivery Inspection
5 Break-in Operation
6 Test Run
7 Checks After Test Run

2.SERVICE DATA
1 Outline Dimensions
2 Fuel Injection System
3 Engine Lubrication System Diagram
4 Cooling Water System Diagram
5 Specifications
6 Maintenance Data
7 Tightening Torque Data
8 Sealant Application Locations

3.MAINTENANCE
1 Special Tool
2 Inspection Schedule
3 Inspection Items

4.FUEL SYSTEM (Fuel Injection)
1 Special Tools
2 Piping Arrangement Diagram
3 Parts Layout
4 ECU System
(1) Configuration of ECU System
(2) Control System
(3) Fuel Injection Control
(4) Control of Fuel Feed Pump (FFP)
(5) Control of Tachometer
(6) Warning Buzzer and Lamp (LED), and Control of Engine Revolution Speed
5 Ignition System
(1) Configuration of Ignition System
(2) Ignition Control
(3) Fuel Feed System
6 Components of Fuel Feed System
7 Outline of Fuel Injection System
8 Inspection Items

5.POWER UNIT
1 Special Tools
2 Parts Layout
3 Inspection Items

6.LOWER UNIT
1 Special Tools
2 Parts Layout
3 Inspection Items

7.BRACKET
1 Special Tools
2 PTT Wiring and Layout Diagram
3 Parts Layout
4 Inspection Items

8.ELECTRICAL SYSTEM
1 Special Tools
2 Electrical Component Layout
3 Parts Layout
4 Ignition System, Ignition Control System
5 Fuel Control System
6 Starting System
7 Battery Charging System
8 ECU Coupler

9.TROUBLESHOOTING
1 Troubleshooting List
2 Power Unit
State 1 : Engine will not start or is hard to start.
State 2 : Full throttle engine revolution speed is low / Engine revolution speed fall off.Engine stalls
State 3 : Engine rotation is unstable or hunting occurs in low speed range.
3 PTT Unit
State 1 : PTT will not operate.
State 2 : PTT is not capable of sustaining outboard motor
4 3AC Diagnosis
1.Set Up
2.Hardware Connection
3.Position of ON/OFF switch for function test and running (Drop) test
4.Operating Procedure

10.ACCESSORIES
1 Remote Control Components
2 Installation of Meters and Battery
3 Operation

11.WIRING DIAGRAM
1 Wiring Chart
2 MF/MFG Model
3 EF/EFG/EFT Model
4 EP/EPG/EPT Model