Introduction; Specifications; Test And Adjustment Specifications; Special Torque Chart - Yanmar BY Series Service Manual

Introduction

INTRODUCTION
This section of the Service Manual describes the procedures necessary to service the 4BY and 6BY
marine engine cooling systems.

SPECIFICATIONS

Test and Adjustment Specifications

Note: All pressure specifications are with engine at normal operating temperature.
Inspection Item
Cooling System Test
Pressure
Filler Cap Test Pressure
Thermostat
Repair Specifications
Coolant Capacity (Approximate)

Special Torque Chart

Component
Charge Air Cooler Bolt
Zinc Anode
BY Service Manual
Model
All
All
Marking
All 88°C
46 N·m (40 ft-lb)
25 N·m (18 ft-lb)
Specification
1.4 bar (20 psi)
1.4 bar (20 psi)
Begins
Fully Open
Opening
88°C (190°F) 96°C (205°F)
4BY
6BY
Lubricating Oil
Torque
Application
Not Applied
Not Applied
COOLING SYSTEM
Reference Page
See Pressure Testing
Cooling System and
Filler Cap on page 7-8
See Testing
Thermostat on
page 7-9
10.0 L (10.6 qt)
13.5 L (14.3 qt)
Reference Page
See Remove and Install
Charge Air Cooler on
page 7-14
See Check and Replace
Zinc Anodes on
page 7-11
7-5