Generac Power Systems GP Series Diagnostic And Repair Manual

Generac Power Systems GP Series

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DIAGNOSTIC

REPAIR

MANUAL

PORTABLE GENERATORS

GP Series and UltraSource

Portable Generators

MODELS:

Model 4451, 4986 (12.5 kW)

5734, 4582, 4987 (15 kW)

5735, 4583, 5308 (17.5 kW)

®

DIAGNOSTIC

REPAIR

MANUAL

PORTABLE GENERATORS

GP Series and UltraSource

Portable Generators

MODELS:

Model 4451, 4986 (12.5 kW)

5734, 4582, 4987 (15 kW)

5735, 4583, 5308 (17.5 kW)

®

Table of Contents

Other manuals for Generac Power Systems GP Series

Owner's Manual92 pages

Questions and Answers:

T
Trevor SmithSep 6, 2025
What causes no battery charge DC output in my Generac Power Systems GP Portable Generator?
- M
  Melissa HernandezSep 6, 2025
  If there's no Battery Charge DC output from your Generac Power Systems Portable Generator, check these: * **Corroded battery posts:** Clean the battery posts. * **Faulty battery cable:** Replace the cable. * **Defective battery:** Check the battery's condition and replace it if necessary. If the issue persists, the receptacle might be bad, and you should 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.
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.
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.
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.
V
Vanessa PughSep 14, 2025
How to fix Generac Power Systems Portable Generator engine when it lacks power?
- L
  Lisa CoxSep 14, 2025
  If your Generac Power Systems Portable Generator engine lacks power, try reducing the load. Also, you can clean or replace the air filter.
S
stevensontonyaSep 12, 2025
Why Generac Power Systems GP engine lacks power?
- N
  Nathan TaylorSep 12, 2025
  If your Generac Power Systems Portable Generator engine lacks power, it could be due to: * Too high load: Reduce the load. See “Don’t Overload the Generator” section. * Dirty air filter: Clean or replace the air filter.
B
brodriguezSep 13, 2025
How to fix Generac Power Systems GP Portable Generator engine that “hunts” or falters?
- T
  Timothy MitchellSep 13, 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.
E
Emily HolmesSep 5, 2025
Why does my Generac Power Systems GP engine “hunt” or falter?
- A
  ananewmanSep 5, 2025
  If your Generac Power Systems Portable Generator engine “hunts” or falters, it could be due to: * **Choke is opened too soon:** Move the choke to the halfway position until the engine runs smoothly. * **Carburetor issues:** For carburation problems (running too rich or lean), contact an Authorized Service Facility.
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.

Generac Power Systems GP Series Specifications

General

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

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