Ford LSG 875 User Manual

l-03
BASIC ENGINE
I-03
DESCRIPTION AND OPERATION
The 7.5 liter (460 CID) V-8 Engine is a light-
weight cast iron design with a bore of 4.36
inches and a stroke of 3.85 inches.
MANIFOLDS
The cast iron intake manifold is an exhaust
gas heated design with eight mounting bolts per
side. Coolant is discharged from the engine
through the outlet housing at the right front of
the intake manifold.
The intake manifold contains two sets of air-
fuel mixture passages which have round ports.
All passages are of nearly equal length to as-
sure more even mixture distribution to the cylin-
ders. The upper set of passages feeds cylinders
1, 4, 6 and 7 from the right primary and second-
ary bores of the carburetor. Exhaust gases flow
through the crossover passage below the car-
buretor mounting pad to provide the initial heat
for vaporization of the air-fuel mixture.
Filtered air for use in automatic choke is heat-
ed in a heat chamber at the crossover passage
of the intake manifold. This air is drawn from the
air cleaner through the air inlet tube, and is di-
rected to the automatic choke through the air
outlet tube.
The cast iron exhaust manifolds are the con-
ventional runner type. The hot and cold air in-
take shroud is mounted on the right exhaust
manifold. Two engine lifting brackets are incor-
porated with the exhaust manifolds.
-.-
CYLINDER HEADS
Cylinder head assemblies have rail type rock-
er arms individually mounted on threaded studs.
Combustion chambers are cast in an advanced
wedge (quench) design with more rounded con-
tours. Valves are canted at angles so their
heads will conform to these contours. Intake and
exhaust ports are round in cross section. The
valve arrangement from front to rear is E-I-E-I-E-
l-E-1 for the left cylinder head, and I-E-I-E-I-E-I-E
for the right cylinder head.
The cylinder head gasket used on all marine
engines is the composition-type with a stainless
steel core and should be installed dry, that is,
without any sealer.
CYLINDER BLOCK
The cast iron cylinder block has five main
bearings. All oil passages are closed with pipe
plugs. Main bearings are of intermediate copper-
lead material with an oil groove only in the upper
half. Crankshaft end thrust is controlled by the
flanges of the center main bearing.
Cylinders are numbered from front to rear with
1 through 4 on the right bank and 5 through 8 on
the left bank. Each slipper skirt autothermic
piston has two compression rings and an oil
control ring. The upper compression ring has a
moly-filled groove and the lower compression
ring has a scraper groove. The oil control ring
assembly consists of a stainless steel expander
spacer separating chrome-plated steel rails.
Pressed-in piston pins and strap-type caps with,
overplated copper-lead alloy bearings are used
with the connecting rods.
All 460 marine engines are available in either,
standard or reverse rotation, except for the “Ski
Boat.” The 460 Ski Boat engine is standard rota-
tion only. The firing order is different between
reverse and standard rotation. Standard rotation
is 1-5-4-2-6-3-7-8. Reverse rotation is
l-8-7-3-6-2-4-5. The crankshaft is precision cast,
nodular alloy and has five main bearings.
Two crankshaft assemblies are used on ma-
rine engines depending upon whether the en-
gine is standard or reverse rotation. The knurling
must throw oil toward the slinger.
A two-piece split lip-type rear oil seal is used
for service on marine engines. They are color *
coded, yellow for use with a standard rotation
crankshaft and red for use with a reverse rota-
tion crankshaft.
The 460 engines have cast pistons with the
notch, for assembly.
The cylinder front cover is die cast aluminum.
The standard marine 460 engines use a cast
iron front cover while the “Ski Boat” engines use
the aluminum front cover. Mounted on it are the
water pump (all marine engines except the 460
“Ski Boat” engine use a marine bi-rotational
water pump with a stainless steel external by-
pass tube, left hand water inlet, and no heater
inlet. The “Ski Boat” engine uses a standard au-
tomotive water pump) with bonded ceramic seal
contact face. The oil pump is mounted at the
lower left front of the block and is driven by the
distributor through an intermediate 516 inch hex
driveshaft.

Ford LSG 875 Specifications

General

Brand	Ford
Model	LSG 875
Category	Engine
Language	English

Summary

Important Safety Notice

Notes, Cautions, and Warnings

Explains notes, cautions, and warnings used in the manual.

Part 1 - Basic Engine

Engine Identification

Engine identification plates and codes.

Engine Description and Operation

Detailed explanation of engine components and functions.

Engine Diagnosis and Testing

Procedures for diagnosing and testing engine systems.

Engine Cleaning and Inspection

Steps for cleaning and inspecting engine parts.

Engine Overhaul Procedures

Procedures for engine overhaul and component replacement.

Engine Adjustments

Steps for adjusting engine components and settings.

Engine Removal and Installation

Procedures for removing and installing engine components.

Part 2 - Ignition System

Ignition System Identification

Identifying distributor assemblies by stamped tags.

Solid State Ignition Description

Explanation of the Duraspark II breakerless ignition system.

Ignition System Diagnosis and Testing

Procedures for diagnosing and testing the ignition system.

Ignition System Run Circuit Test

Testing the ignition system's run circuit for spark.

Distributor Removal and Installation

Procedures for removing and installing the distributor.

Prestolite Distributors - Description and Operation

Explanation of the centrifugal advance distributor.

Prestolite Distributors - Major Repair Operations

Major repair operations for Prestolite distributors.

Part 3 - Fuel System

Fuel System Identification

Identifying carburetors by their tags.

Fuel System Description

Description of the fuel pump and its operation.

Fuel System Diagnosis and Testing

General information about fuel system diagnosis.

Fuel Pump Pressure and Capacity Testing

Procedures for testing fuel pump pressure and capacity.

Fuel Pump Removal and Installation

Procedures for removing and installing the fuel pump.

Model 2300 2-V Carburetor Description

Description of the Model 2300 2-V carburetor.

Model 2300 2-V Carburetor Adjustments

Procedure for adjusting the idle mixture screws.

Model 2300 2-V Carburetor Fuel Level Adjustment

Performing the wet adjustment of the fuel level float.

Model 4160 Carburetor Service Procedures

General service procedures for carburetor cleaning and inspection.

Part 4 - Charging System

Alternator Description and Operation

Description of the alternator and its function.

Regulator Description and Operation

Description of the electronic voltage regulator.

Charging System Diagnosis

Procedures for diagnosing charging system issues.

Charging System Testing - Battery

Battery warnings, handling, and specifications.

Charging System Testing - Capacity Test

Procedure for testing battery capacity using a discharge tester.

Charging System Tests - Motorola

Tests for Motorola alternators and regulators.

Charging System Testing - Over Voltage Tests

Diagnosing over voltage conditions in the charging system.

Charging System Testing - Rotor Open or Short Circuit Test

Testing the alternator rotor for open or short circuits.

Alternator Removal and Installation

Procedures for removing and installing the alternator.

Alternator Disassembly and Assembly

Disassembling the rear terminal alternator.

Charging System Adjustments - Belt Tension

Procedures for checking and adjusting belt tension.

Part 5 - Starting System

Starting System Description and Operation

Overview of the starting system components and operation.

Starting System Sequence of Operation

Step-by-step operation of the starting system.

Starting System Testing - Jump Starting

Safety precautions and procedures for jump starting.

Starting System Testing - Starter Load Test

Performing a starter load test to check current draw.

Starter Disassembly and Assembly

Disassembling and cleaning/inspecting the starter motor.

Starter Armature Replacement

Procedures for replacing the starter armature.

Part 5a-Starter, Permanent Magnet

Permanent Magnet Starter Description and Operation

Description of the permanent magnet starter system.

Starter Diagnosis and Testing - Check Starter Motor

Testing the starter motor operation.

Starter Diagnosis and Testing - Starter Load Test

Performing a starter load test.

Starter Removal and Installation

Procedures for removing and installing the starter motor.

Starter Disassembly and Assembly

Disassembling and cleaning/inspecting the starter motor.

Part 6 - Governors

Mechanical Governor - Belt Driven Description and Operation

Description of belt-driven mechanical governors.

Mechanical Governor Troubleshooting

Troubleshooting mechanical governor issues.

Governor Adjustments - Spread Adjustment

Adjusting governor spread for sensitivity.

Part 7 - Cooling

Cooling System Description and Operation

Description of the cooling system and coolant flow.

Cooling System Testing

Procedures for testing the cooling system.

Cooling System Pressure Test

Procedures for performing a cooling system pressure test.

Cooling System Thermostat Test

Procedures for testing the thermostat's operation.

Thermostat Replacement

Procedures for replacing the thermostat.

Cooling System Cleaning and Inspection

Procedures for cleaning the cooling system.

Part 8 - Specifications

General Engine Specifications

General engine specifications and dimensions.

Valve Train Specifications

Specifications for rocker arms, push rods, and lifters.

Camshaft and Bearings Specifications

Specifications for camshaft and bearing dimensions.

Ignition System Specifications

Specifications for ignition system components.

Carburetor Specifications

Specifications for various carburetor models.

Metrics

Introduction to Metric Fasteners

Introduction to metric fasteners and their specifications.

Nomenclature for Bolts

Nomenclature for English and metric system bolts.

Hex Nut Strength Identification

Identification marks for hex nut strength.

Torque Conversion

Table for converting Newton meters to pound-feet.