Part of the Yanmar Operator Manuals.
Bleed the fuel system in the wrong order on a 2GM20F and you can crank the battery flat without a single fire. This Yanmar operator manual, publication 128270-4E, walks the fuel, lubricating oil, and cooling water systems for the 1GM10, 2GM20(F), 3GM30(F), and 3HM35(F) marine diesels, from single cylinder to three, in 131 pages of factory procedure.
It covers installation and launching, first start of a new engine, daily operation and stopping, storage, and the full periodical inspection schedule, then closes with troubleshooting charts, piping diagrams for both sea water and fresh water cooling, and A-Type and B-Type electrical wiring diagrams.
The PDF downloads immediately and prints clean, so the air bleeding sequence or the maintenance standard table can sit next to the engine and get oily instead of living on a phone screen.
Complete the set for your 1GM10–3HM35 Series
What's Inside This Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Name of Parts | 9-12 | Reduction and Reversing Gear, Output Shaft Coupling, Cooling Water Pump, Fuel Injection Pump, Alternator, Starter Motor |
| Engine Specifications | 13-16 | Type, No. of Cylinders, Combustion System, Fuel Injection Timing, Reduction Ratio, Lubricating System |
| Engine Installation | 17-32 | Inspection After Unpacking, Preparation of the Engine Foundation Plate, Propeller, Propeller Shaft, Cooling Wtaer Supply Device |
| After Launching | 33-34 | |
| Fuel and Lubricating Oil | 35-40 | Selection and Handling of Fuel Oil, Selection of Lubricating Oil |
| Staring the New Engine for the First Time | 41-50 | Supply of Fuel Oil, Supply of Lubricating Oil, Supply of Fresh Water (2GM20F, 3GM30F, 3HM35F), Air Bleeding in the Fuel System, External Inspection |
| Method of Operation | 51-68 | Starting, Cautions After Starting the Engine, Cautions During Operation, Stopping |
| Storage | 69-72 | Storing, Removing Engine From Storage |
| Periodical Inspection and Maintenance | 73-114 | Maintenance Standard, Fuel Oil System, Lubricating Oil System, Cooling Water System, Inspection of Engine Body, Washing the Air Intake Silencer Element |
| Trouble Shooting | 115-124 | Engine Hard to Start, Engine Knocks, Lack of Engine Power, Engine Overheat, Low Lube Oil Pressure, High Fuel Consumption |
| Fuel Oil, Lubricating oil,and Cooling Water Piping Diagram | 125-128 | 1) Sea Water Cooling Type, 2) Fresh Water Cooling Type |
| Electrical Wiring Diagram | 129-130 | 1) A-Type, 2) B-Type |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Wiring cross-sectional area (1+2+3) | < 2.5mm² ~ 20mm² | p. 129 |
| Extension cable total length | less than 6m | p. 129 |
| Fuel filter element replacement interval | Every 250 hrs | p. 75 |
| Alternator belt tension (deflection with 10kg thumb force) | 10mm | p. 107 |
| 1GM10, 2GM20, 3GM30 | ||
| Starter motor power (1GM10, 2GM20, 3GM30) | 12V-1.0kW | p. 13 |
| 3HM35 | ||
| Starter motor power, 3HM35 | 12V-1.8kW | p. 13 |
| 1GM10 | ||
| Number of cylinders, 1GM10 | 1 | p. 1 |
| Continuous rating output (DIN 6270A) | 8.0 Hp/3400 rpm | p. 13 |
| Crankcase lube oil capacity | 1.3L | p. 13 |
| 2GM20(F) | ||
| Number of cylinders, 2GM20(F) | 2 | p. 1 |
| 3GM30(F), 3HM35(F) | ||
| Number of cylinders (3GM30(F), 3HM35(F)) | 3 | p. 1 |
| 1GM10, 2GM20(F) | ||
| Reduction and reversing gear lube oil capacity | 0.25L | p. 43 |
