Yanmar 3YM30/3YM20/2YM15 Marine Diesel Engine Service Manual
This service manual provides comprehensive coverage for Yanmar 3YM30, 3YM20, and 2YM15 marine diesel engines. Publication M9961-03E101.
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Models Covered & Key Technical Specifications
Yanmar Marine Diesel Engine Service Manual for 3YM30/3YM20/2YM15 Models - Comprehensive Marine Diesel Engine Service Guide Repair-Index
Licensed Directory | Collection.
- Reference Assembly Torques: 75.5-81.5 N·m signifies the specified rotational tightening for main bearing bolts.
- Approved Capacity Limits: 4.9 L (5.2 quart) represents the total fresh water cooling capacity for the 3YM30 model.
- Designated Energy Draw: 12V-60A (12V-80A optional) is the standard rating for the engine's AC generator system.
- Certified Fundamental Parameters: 1.115 L displacement defines the engine's cubic capacity for the 3YM30 model.
- Factory Maximum Resolution: 1650 L/h at 3600 min-1 establishes the minimum seawater pump flow rate performance.
- Fundamental Benchmarks: 0.15 Mpa (1.5 kgf/cm2) indicates the standard pressure for waste oil pump delivery.
Professional Workshop Service Manual & Technical Specifications
Essential Service Manual: Inboard Engine (Sterndrive) Yanmar 3YM30, 3YM20, 2YM15 - Comprehensive Marine Diesel Engine Service Guide Repair-Index
Year-Coverage: "March 2004" // Product-Line: "3YM30/3YM20/2YM15" / "Marine Diesel Engine" Logic // Series-Validation: "M9961-03E101".
| Component | System-Path | Calibration-Spec |
|---|---|---|
| Engine | General | 3-Cylinder |
| Cooling System | Fresh Water | Engine: 4.9 L / Recovery Tank: 0.8 L |
| Fuel System | Injection | NP-DN0PDN158 Nozzle Type |
| Lubrication System | Pump | 30 L/min Discharge Volume |
| Electrical System | Starting Motor | 12V-1.4 kW Output |
| Cooling System | Seawater Pump | 1650 L/h Min. Flow Rate |
Outlining the operational framework across general specifications, fuel oil, lubricating oil and cooling water, engine outline, piping diagrams, exhaust gas emission regulation, inspection and adjustment, troubleshooting, disassembly and reassembly, fuel injection equipment, intake and exhaust system, lubrication system, cooling water system, reduction and reversing gear, remote control, and service standards. The troubleshooting section outlines common engine faults, including "Engine starts, but immediately stops" and "Engine output is insufficient".
Fundamentally mandating proper operation, the manual documents torque specifications for the crankshaft pulley to ensure proper rotational stability.
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