Generac Power Systems GP Series User Manual

Generac Power Systems GP Series

92 pages

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GP Series Portable Generator

Owner’s Manual

MODEL:________________________

SERIAL:________________________

DATE PURCHASED:______________

Register your Generac product at:

WWW.GENERAC.COM

1-888-GENERAC

(1-888-436-3722)

SAVE THIS MANUAL FOR FUTURE REFERENCE

013394

(000209b)

WARNING

Loss of life. This product is not intended to

be used in a critical life support application.

Failure to adhere to this warning could result

in death or serious injury.

BC

Table of Contents

Other manuals for Generac Power Systems GP Series

Diagnostic And Repair Manual98 pages

Questions and Answers:

T
Tyler PetersAug 23, 2025
Why won't my Generac Power Systems GP start?
- D
  deborah54Aug 23, 2025
  If your Generac Power Systems Portable Generator won't start or runs rough, possible causes include: * The fuel shut-off is OFF: Turn the fuel shut-off to ON. * Dirty air filter: Clean or replace the air filter. * Out of or stale gasoline: Fill the fuel tank with fresh fuel after draining the old fuel. * Spark plug wire not connected: Connect the wire to the spark plug. * Bad spark plug: Replace the spark plug. * Water in the gasoline: Drain the fuel tank and fill it with fresh fuel. * Over-choking: Put the choke knob to the No Choke position. * Low oil level: Fill the crankcase to the proper level.
A
Aaron SchmidtSep 3, 2025
How to fix Generac Power Systems GP Portable Generator engine that lacks power?
- K
  kperezSep 3, 2025
  If your Generac Power Systems Portable Generator engine lacks power, the following could be the reasons: * **Load is too high:** See “Don’t Overload the Generator”. * **Dirty air filter:** Replace the air filter. If these steps don't resolve the issue, the engine may need servicing by an Authorized Service Facility.
T
taylordawnSep 1, 2025
What to do if Generac Power Systems GP Portable Generator engine runs good but bogs down when loads are connected?
- D
  Dr. Kenneth LewisSep 2, 2025
  If your Generac Power Systems Portable Generator engine runs well but bogs down when loads are connected, here are possible causes: * **Short circuit in a connected load:** Disconnect the electrical load that has a short circuit. * **Generator is overloaded:** See “Don’t Overload the Generator”. For issues related to engine speed or a shorted generator circuit, contact an Authorized Service Facility.
D
Douglas AllenSep 1, 2025
Why does my Generac Power Systems GP Portable Generator engine shut down during operation?
- D
  daniel91Sep 1, 2025
  Your Generac Power Systems Portable Generator's engine might shut down for a few reasons: * **Out of gasoline:** Refill the fuel tank. * **Low oil level:** Add oil to the crankcase to the correct level. If neither of these is the issue, there may be a fault in the engine, and you should contact an Authorized Service Facility.
C
christinalivingstonAug 30, 2025
What to do if my Generac Power Systems Portable Generator engine is running, but there is no AC output?
- M
  Michele MooreAug 30, 2025
  If your Generac Power Systems Portable Generator's engine runs but has no AC output, consider these potential causes and solutions: * **Circuit breaker is open:** Reset the circuit breaker. * **Poor connection or defective cord set:** Check and repair the connection or cord set. * **Connected device is faulty:** Connect a device known to be in good working condition. If the issue persists, there may be a fault in the generator, and you should contact an Authorized Service Facility.
C
Carlos MatthewsAug 28, 2025
How to fix a Generac Power Systems GP Portable Generator that hunts or falters?
- L
  lynchjanetAug 28, 2025
  If your Generac Power Systems Portable Generator engine "hunts" or falters, it might be because: * The choke is opened too soon: Move the choke to the halfway position until the engine runs smoothly. * Carburetor is running too rich or too lean: Contact Authorized Service Facility.
R
Rachel HicksAug 27, 2025
Why does my Generac Power Systems Portable Generator lack power?
- C
  Charlotte SmithAug 27, 2025
  If your Generac Power Systems Portable Generator engine lacks power, consider the following: * The load is too high: Reduce the load (see “Don’t Overload the Generator”). * Dirty air filter: Clean or replace the air filter. * Engine needs service: Contact an Authorized Service Facility.
L
Larry HicksAug 26, 2025
What to do if my Generac Power Systems GP bogs down under load?
- D
  Darryl RodriguezAug 27, 2025
  If your Generac Power Systems Portable Generator runs well but bogs down when loads are connected, consider these potential issues: * Short circuit in a connected load: Disconnect the shorted electrical load. * Generator is overloaded: See “Don’t Overload the Generator”. * Engine speed is too slow or shorted generator circuit: Contact Authorized Service Facility.
B
bwashingtonAug 25, 2025
Why does my Generac Power Systems GP shut down?
- R
  Roger TateAug 26, 2025
  If your Generac Power Systems Portable Generator engine shuts down during operation, check the following: * Out of gasoline: Refill the fuel tank. * Low oil level: Fill the crankcase to the proper level. * Fault in engine: Contact an Authorized Service Facility.
H
hamptonjeffreyAug 25, 2025
What to do if my Generac Power Systems GP has no AC output?
- B
  Brandy JacksonAug 25, 2025
  If your Generac Power Systems Portable Generator's engine is running but there's no AC output, it could be due to several reasons: * The circuit breaker is open: Reset the circuit breaker. * Poor connection or defective cord set: Check and repair the connection or cord set. * Connected device is faulty: Connect another device that is in good condition. * Fault in generator: Contact an Authorized Service Facility.

Generac Power Systems GP Series Specifications

General

Brand	Generac Power Systems
Model	GP Series
Category	Portable Generator
Language	English

Summary

Section 1 Introduction and Safety

Safety Rules and Definitions

Guidelines, alerts, and definitions for DANGER, WARNING, CAUTION, and NOTE.

Safety Symbols and Meanings

Explanation of hazard symbols and their implications for safe operation.

Electrical Hazards

Warnings and precautions related to electrocution and electrical shock hazards.

Exhaust and Location Hazards

Dangers associated with carbon monoxide and proper generator placement.

Fire Hazards

Risks of fire from fuel, hot surfaces, and electrical issues during operation.

Section 2 General Information and Setup

Product Specifications

COsense® Detection System

Generator Assembly

Adding Engine Oil

Fueling the Generator

LP Fuel Requirements

Section 3 Operation

Before Starting Engine

Critical safety checks and preparations required before starting the generator engine.

Prepare Generator for Use

Grounding the Portable Generator

Connecting to Building Electrical System

Know Generator Limits

Starting Gasoline Pull Start Engines

Starting LP Pull Start Engines

Starting Gasoline Electric Start Engines

Starting LP Electric Start Engines

Generator Shut Down Procedure

Low Oil Level Shutdown System

Charging the Battery

Section 4 Maintenance and Troubleshooting

Maintenance Schedule

Engine Maintenance

Inspect Engine Oil Level

Changing Engine Oil

Air Filter Service

Spark Plug Service

Inspect Muffler and Spark Arrestor

Inspect Spark Arrestor Screen

Storage Preparation

Drain Carburetor Gasoline Fuel

Troubleshooting Guide

No AC Output Troubleshooting

Engine Bogs Under Load Troubleshooting

Engine Start/Rough Running Troubleshooting

Addressing problems with the engine failing to start or running unevenly.

Engine Shuts Down Troubleshooting

Identifying causes and solutions when the generator shuts down unexpectedly during operation.

Engine Lacks Power Troubleshooting

Engine Surges or Stumbles Troubleshooting

Engine Starts and Shuts Off Troubleshooting

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