Safety Precautions; Introduction; Specifications; Special Torque Chart - Yanmar BY Series Service Manual

Safety Precautions

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SAFETY PRECAUTIONS

Before servicing the electrical components, review the Safety Section on page 2-1.

INTRODUCTION

This section of the Service Manual describes the operation of and procedures to test and replace the
components of the electrical system and engine control unit (ECU) as used on the Yanmar 4BY2 and 6BY2
marine engines.

SPECIFICATIONS

Special Torque Chart

High-Pressure Fuel Control Valve Retaining Nut
High-Pressure Fuel Sensor Retaining Nut
Fuel Volume Regulator Screws
BY Service Manual
Item
© 2009 Yanmar Marine International
ELECTRICAL AND ECU
Specification
80 N·m (59 ft-lb)
70 N·m (52 ft-lb)
6.6 N·m (58 in.-lb)
12-3