Generac Power Systems GN191H Manuals

Manuals and User Guides for Generac Power Systems GN191H. We have 1 Generac Power Systems GN191H manual available for free PDF download: Service And Repair Manual

Generac Power Systems GN191H Service And Repair Manual (62 pages)

Small Frame GN Engine

Brand: Generac Power Systems | Category: Engine | Size: 17 MB

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
- 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 GN191H Manuals

Generac Power Systems GN191H Service And Repair Manual (62 pages)

Table of Contents

Dimensions and Features

4-Cycle Engine Theory

Section 1: General

Section 2: Air Cleaners and Carburetion

Section 3: Mechanical Governor

Section 4: Optional Idle Control

Section 5: Rewind Starters

Section 6: Electric Starters and Batteries

Section 7: Covers and Shrouds

Section 8: Ignition System

Section 9: Valve Train

Section 10: Piston, Rings and Rod

Section 11: Crankshaft and Camshaft

Section 12: Lubrication

Section 13: Troubleshooting

Specifications

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