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Jacobsen 321 Manuals
Manuals and User Guides for Jacobsen 321. We have
1
Jacobsen 321 manual available for free PDF download: Service Manual
Jacobsen 321 Service Manual (104 pages)
horizontal - vertical
Brand:
Jacobsen
| Category:
Engine
| Size: 16 MB
Table of Contents
Table of Contents
3
Introduction
6
Understanding Horsepower and Torque
10
Horsepower, Speed and Torque in Engines
20
Principles of Operation
26
Jacobsen Engine Cross Section
29
Ideal Fuel Mixture Requirements
39
Carbon Build-Up
39
Troubleshooting
42
How to Start a 2-Cycle Engine
42
Ignition System
43
Compression
43
Fuel System
44
Crankcase Seals and Gaskets
44
Exhaust Ports and Muffler
45
Air Cleaner
46
Foil Type Cleaner
46
Paper Filter
46
Piston and Rings
47
Oil Bath Type Cleaner
47
Foam Type
47
Fuels and Lubricants
48
Master Troubleshooting Chart
49
Service Data
52
Tolerances and Clearances
52
RPM Settings
53
Speed Settings Table
53
Specifications
54
Torque Data
54
Special Tools
55
Coil Test Data
55
Condenser Test Data
55
Magneto Test Data
56
Test Instrument
56
To Check Trigger Coils Early and Late Production
57
To Check Charging Coil and Electronics Group
57
Engine Overhaul
60
Engine Teardown and Inspection
60
Reed Adapter Inspection
61
Flywheel
61
Stator Assembly
62
Baffle and Cylinder Head
63
Piston and Rod Removal
63
Crankcase Head Assembly
68
Crankshaft Removal
68
Carburetor Identification
69
Carburetor Nomenclature
69
Carburetor Inspection
69
Carburetor Disassembly and Cleaning
71
Float Bowl Housing Disassembly
72
Main Metering Nozzle
72
Fuel and Air Flow
73
Cross Section of Walbro Carburetor
74
Needle and Seat Inspection
75
Carburetor Reassembly
75
Float Adjustment
76
Meter Nozzle Installation
76
Magneto
77
Stator Assembly Inspection
78
Ignition Timing
78
Point Setting
79
Starter
80
Tension Release of Rewind Spring
81
Starter Rope Replacement
81
Spring Installation
82
Starter Reassembly
82
Up and Away Starter Disassembly
82
Final Engine Adjustments
83
Up and Away Starter Reassembly and Spring Tensioning
83
High-Speed Needle
83
Idle Adjustment
84
Choke Adjustments
85
Engine Control Cable
85
Cleaning and Storage
88
Exploded Views and Parts List
90
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