Part of the Yanmar Operator Manuals.
Air trapped in the fuel lines will keep a small marine diesel cranking until the battery gives up, and the bleeding procedure that clears it is one of the first things this book settles. It is Yanmar's operator manual for the 1GM, 2GM, 3GMD, and 3HM pleasure craft diesels: 56 pages in English running from engine installation and first start through daily operation, winter storage, and the periodical maintenance schedule.
The maintenance chapter carries the numbers owners chase: fuel injection timing for each model, valve clearance, alternator belt deflection, and a 250 hour fuel filter element interval. Piping and wiring diagrams at the back trace every line and terminal, and the troubleshooting chart works through hard starting, knocking, overheating, and black or gray exhaust smoke.
The PDF carries 44 bookmarks for quick navigation, and pages print cleanly, so the bleeding sequence can lie beside the injection pump and take the fuel stains instead of your only copy.
What's Inside This Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 1 | Engine Parts, Engine Maintenance, Proper Handling, Dealer Consultation, Safety Messages, Operation Messages |
| Appearance | 2-3 | Engine Number, Clutch Model Name Plate, Engine Model Name Plate, Engine Model, Clutch Model, Clutch Gear Ratio |
| Name of Parts | 4 | Reduction and Reversing Gear, Cooling Water Pump, Fuel Feed Pump, Alternator, Fuel Injection Pump, Engine Stop Device |
| Engine Specifications | 5 | No. of Cylinders, Continuous Rating Output, Fuel Injection Timing, Reduction Ratio, Lubricating System, Cooling System |
| Engine Installation | 6-15 | 3-1.1 Inspection After Unpacking, 3-2.1 Preparation of the Engine Foundation Plate, 3-3.1 Engine Installation, 3-4.1 Propeller, Propeller Shaft, 3-5.1 Cooling Water Supply Device |
| After Launching | 16 | Water or Air Intake, Engine Installation Bolts, Shaft Joints, Decompression Lever, Clutch Handle, Propeller Shaft Alignment |
| Fuel and Lubrication Oil | 17-19 | Selection and Handling of Fuel Oil, Selection of Lubricating Oil |
| Starting the New Engine for the First Time | 20-24 | Supply Fuel Oil, Supply of Lubrication Oil, Air Bleeding in the Fuel System, External Inspection, Remote Control Device Check, Check of Instrument Panel Alarm System, Tuning |
| Method of Operation | 25-31 | Tuning, Starting, Cautions After Starting the Engine, Cautions During Operation |
| Storage | 32-36 | Stopping, Storing, Removing Engine From Storage |
| Periodical Inspection and Maintenance | 37-53 | Fuel Oil System, Lubricating Oil System, Cooling Water System, Inspection of Engine Body, Washing the Air Intake Silencer Element |
| Trouble Shooting | 54 | Engine Hard to Start, Engine Knocks, Engine Runs Irregularly, Lack of Engine Power, Engine Overheat, Engine Emits Black or Gray Exhaust Smoke |
| Fuel Oil, Lubricating Oil and Cooling Water Piping Diagram | 55 | Fuel Injection Valve, Lube Oil Pressure Switch, Cooling Water Pump, Kingston Cock, Fuel Injection Pump, Fuel Oil Filter |
| Electrical Wiring Diagram | 56 | Battery, Key Switch, Push Button Switch, Starter Motor, Alternator, L.O. Pressure Switch |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Fuel filter element replacement interval | every 250 hours of operation | p. 43 |
| Recommended speed control cable type | Morse 33-C | p. 12 |
| Recommended clutch control cable type | Morse 33-C | p. 12 |
| Alternator belt tension (with 10kg thumb force) | 10 mm | p. 48 |
| Intake/exhaust valve clearance | 0.2 mm | p. 8 |
| 1GM, 2GM, 3GMD | ||
| Recommended battery capacity (1GM, 2GM, 3GMD) | 12V - 70AH (Mini) | p. 16 |
| 3HM | ||
| Recommended battery capacity, 3HM | 12V - 100AH (Mini) | p. 16 |
| Fuel injection timing, 3HM | 21±1 degree BTDC | p. 41 |
| 1GM, 2GM | ||
| Fuel injection timing (1GM, 2GM) | 15±1 degree BTDC | p. 41 |
| 3GMD | ||
| Fuel injection timing, 3GMD | 18±1 degree BTDC | p. 41 |
