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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Yanmar 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.
Technical Specifications
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Document Number / Seller:
28189 / Sandra White
File Size:
16.79 MB
File Type:
PDF
Language:
English
Pages:
231
Printable:
Yes
Category:
Inboard-Engines-Sterndrives
Last updated / verified
Apr 26, 2025

Yanmar Manual Features & Content Preview

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.

Manual FAQ, Purchase & Download Details

Can I view the exploded views and component breakdown illustrations for the engine assembly within the document? keyboard_arrow_down

Service manual includes various exploded views and diagrams covering major engine components to assist in identifying part structures. These illustrations are provided for the 3YM and 2YM series to show the assembly layout of the basic engine parts.

Which sections contain wiring diagrams and connector pinout references for the electrical system? keyboard_arrow_down

Electrical system chapter lists comprehensive wiring diagrams and connector references for both the standard and optional charging systems.

What information is provided in the specification tables regarding tightening torque categories or clearances? keyboard_arrow_down

Document contains detailed specification tables that list tightening torque standards for main bolts and nuts. These tables also include engine-related technical references such as displacement, combustion parameters, and cooling capacity limits for the 3YM and 2YM series engines.

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