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GN190H
Generac Power Systems GN190H - User Manual
62 pages
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2
Table of Contents
Main Page
Default Chapter
3
Table of Contents
3
Dimensions and Features
5
4-Cycle Engine Theory
10
Section 1: General
11
Purpose and Scope of Manual
11
Small Frame Engines
11
Long Block
11
Engine I.D. Number/Serial Number
11
Engine Care
12
Recommended Fuels
12
Recommended Engine Oil
12
Change Oil Filter
12
Storage Instructions
12
Tune-Up Procedure
12
Oversize Parts
14
Section 2: Air Cleaners and Carburetion
16
Air Cleaner
16
Servicing
16
Foam Pre-Cleaner
16
Paper Filter
16
Air Cleaner Box Removal
16
Air Cleaner Box Installation
17
Carburetion
17
General
17
Common Carburetor Problems
17
Adjustable and Fixed Main Jet
17
Carburetor Removal
18
Carburetor Disassembly
18
Cleaning and Inspection
18
Carburetor Installation
18
Section 3: Mechanical Governor
20
Governor Operation
20
Governor Internal Parts
20
Governor External Parts
20
Removal of Governor External Parts
20
Installation of Governor External Parts
21
Governor Gear Shaft Replacement
21
Inspection
21
Removal
21
Installation
21
Linkage Installation
21
Governor Adjustment
21
Initial Adjustment
21
Running Adjustment
22
Section 3: Mechanical Governor
22
Section 4: Optional Idle Control
24
General
24
Operating Instructions
24
Before Start-Up
24
Engine Running
24
Circuit Operation
24
Idle Control Adjustment
25
General
25
Initial Adjustment
25
Final Adjustment
25
Section 5: Rewind Starters
26
General
26
Rewind Assembly Removal
26
Disassembly (Old Style)
27
Reassembly
27
Disassembly (New Style)
27
Section 6: Electric Starters and Batteries
28
Introduction
28
Starter Contactor System
28
Heavy Duty Switch System
28
Starter Motor Operating Principles
28
The Bendix Drive
28
Starter Motor Repairs
28
Starter Motor Removal
28
Starter Motor Installation
28
Testing the Starter Motor
29
Checking the Pinion
29
Tools for Starter Performance Test
29
Starter Performance Test
29
Battery Maintenance
29
General
29
Inspecting the Battery
29
Electrolyte Level
29
Testing a Battery
29
Section 7: Covers and Shrouds
31
General
31
Installation of Covers and Shrouds
31
Section 8: Ignition System
32
General
32
Major Components
32
Ignition Coil Assembly
32
Spark Plug
32
Flywheel
32
Checking Flywheel Magnet
32
Flywheel Key
32
Flywheel Removal
32
Flywheel Installation
33
Testing the Ignition System
33
Section 9: Valve Train
34
Major Components
34
Disassembly
34
Valve Service
35
Valve
35
Valve Seats
35
Valve Guides
36
Valve Tappets
36
Valve Springs
36
Installation
36
Adjusting Valve Clearance
38
Install Rocker Arm Cover
38
Section 10: Piston, Rings and Rod
40
General
40
Removal
40
Piston
40
Removal from Connecting Rod
40
Check Piston for Wear
40
Piston Rings
41
General
41
Description
41
Ring End Gap
41
Connecting Rod
42
Assembly and Installation
42
Assembly
42
Installation
43
Cylinder Service
43
Inspection
43
Reboring the Cylinder
43
Section 11: Crankshaft and Camshaft
44
Camshaft Removal
44
Removal of Crankcase Cover
44
Crankshaft Removal
44
Camshaft Inspection
45
Crankshaft Inspection
45
Crankshaft Proper
45
Crankshaft Sleeve Bearing
46
Compression Release
46
Crankshaft Installation
47
Camshaft Installation
47
Section 11: Crankshaft and Camshaft
47
Section 12: Lubrication
48
General
48
Oil Flow
48
Oil Pickup Assembly
48
Description
48
Inspection
48
Oil Pump
48
Inspection
49
Crankshaft Oil Seals
49
Pressure Relief Valve
50
Description
50
Inspection
50
Breather Assembly
50
Crankcase Cover
50
Inspection
51
Governor Gear Installation
51
Crankcase Cover Installation
51
Optional Oil Filter
52
Low Oil Pressure System
52
Section 13: Troubleshooting
54
Section 13: Troubleshooting
55
Specifications
56
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Generac Power Systems GN190H Specifications
General
Brand
Generac Power Systems
Model
GN190H
Category
Engine
Language
English
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