BYseriesSERVICE MANUALBY Service Manual4BY26BY2P/N: 0BBY0-U00200MARINEENGINES

Yanmar BY Series Service Manual

Introduction

Record of Ownership

Safety

Safety Precautions

Safety Decals

Product Overview

New Engine Break In

Component Identification

Left Side - 6BY2

Right Side - 6BY2

Location of Nameplates

Function of Major Components

Fuses and Relays

Engine Cover

Before You Operate

Diesel Fuel

Filling the Fuel Tank

Engine Oil

Acceptable Engine Oil

Checking Engine Oil

Marine Gear or Stern Drive Oil

Engine Coolant

Engine Operation

Starting the Engine

Starting at Low Temperatures

Checking the Engine After Operation

Periodic Maintenance

Precautions

EPA Requirements

standard torque values

Periodic Maintenance Schedule

Parts

Levels

Periodic Maintenance Procedures

Every 50 Hours of Operation

Every 250 Hours of Operation

engine mounts

Every 500 Hours of Operation

Every 1000 Hours of Operation

Every 2000 Hours of Operation

Troubleshooting

Troubleshooting Chart

Exhaust Color

Vibration - Drive Engaged

Engine Overheat

Diagnostic Trouble Codes

Diagnostic Trouble Code Table

Long-Term Storage

Draining the Seawater Cooling System

Specifications

USA Only

Warranty Period

Customer Assistance

Maintenance Log

epa warranty usa only

4BY2

6BY2

BY series