1987 Isuzu UM4BB1 / UM4BD1 / UM4BD1-II / UM4BDIT / UM4BDIT-II / UM4BD1TC Marine Diesel Engine Workshop Manual

1987 Isuzu Marine Diesel Engine UM4B Series Workshop Manual: diagnostics, service, and parts for UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, UM4BD1TC. Publication IM-WE-4BD1-001.

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Isuzu Models Covered & Key Technical Specifications

Inboard Engine (Sterndrive) UM4BB1 / UM4BD1 / UM4BD1-II / UM4BDIT / UM4BDIT-II / UM4BD1TC (IM-WE-4BD1-001) -- 1987 Engineering Registry & Primer Volume.

  • System Fluid Levels: The cooling system requires 9.2L capacity for optimal operation Framework.
  • Maximum Adjustment Range: 0.4 - 1.3 mm establishes the valve clearance limit Logic.
  • Measured Energy Draw: 40 +5C defines the optimal oil temperature Benchmarks.
  • Published Specific Fuel Consumption: 0.33 g/ps.hr governs the fuel efficiency Range.
  • Authorized Burn-in Temperature: 60 C signifies the initial operating temperature Sequences.
  • Technical Storage Capacity: The crankcase holds 3.7L of oil for standard operation Baseline.
Technical Specifications
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Document Number / Seller:
26142 / Matthew Stewart
File Size:
45.99 MB
File Type:
PDF
Language:
English
Pages:
120
Printable:
Yes
Category:
Inboard-Engines-Sterndrives
Last updated / verified
Apr 15, 2026

Isuzu Manual Features & Content Preview

Technical Installation Safety Manual: Inboard Engine (Sterndrive) Workshop Essentials: Isuzu UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, UM4BD1TC Manual ((1987 Edition)) Specification-Guide

Year-Coverage: 1987 // Conceptual-Layout: Marine / Engine Logic // Year-Coverage: Specifications

Component Baseline Logic
Engine Type Water cooled, 4 cycle, inline 4 cylinder, over-meshed valve Dry chrome coated metal
Max. Output 125ps/2700rpm -
Measurement (LxWxH) (mm) 1077x721x967 3856cc
Weight (DRY) (kg) 568 -
Oil Capacity (L) 7.2L API classification CC grade
Cooling type Pressurized circulation type (with oil cooler) Approx 13L

Providing a structural breakdown of the Isuzu UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, UM4BD1TC marine diesel engines. This manual covers general repair instructions, engine assembly, lubrication, cooling, fuel, and electrical systems. It details diagnostic procedures and component overviews necessary for maintenance and repair.

Systems

Reference data is included for all major engine systems, including the lubricating, cooling, fuel, and electrical systems. The manual outlines the function and interconnections of key components within each system.

Procedures

This manual covers disassembly, inspection, renewal, and assembly procedures for critical engine components. It includes guidance on checking tolerances, adjusting settings, and performing common repairs.

Introduction

The "Workshop Essentials" manual provides essential information for servicing the Isuzu UM4B series marine diesel engines. It is designed to assist technicians in performing repairs and maintenance accurately.

Table

See the Technical Specs Table above for a summary of key engine specifications and configurations.

Specifications

This document provides detailed specifications for various engine components, including dimensions, clearances, and torque values required for proper assembly and function.

This manual documents torque specifications for flange face sealing to ensure proper component mating and prevent leaks.

Manual FAQ, Purchase & Download Details

What kind of component illustrations and exploded views are provided in the manual sections? keyboard_arrow_down

Documentation contains detailed exploded view diagrams and assembly illustrations for major components, including turbochargers, intercooler cases, and various engine assemblies.

Is there a breakdown of tightening torque specifications and standard bolt data? keyboard_arrow_down

Yes, the manual includes dedicated chapters featuring comprehensive tables for standard bolt torque and specific tightening data for critical points such as the cylinder head. These reference tables are designed to support users in locating the appropriate values for their specific hardware and assembly requirements.

Are reference tables available for major engine specifications and fluid capacities? keyboard_arrow_down

Documentation features detailed major specification tables for each engine variant, covering aspects such as fuel consumption, oil volume, and cooling system capacities. These sections also include performance curves and technical data summaries to provide a clear reference for each engine model.

Which edition information and publication history is listed on the document cover? keyboard_arrow_down

Manual displays the original first edition publication date from September 1987 as well as the unique document identifier number located on the cover page.

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