Generac Portable Products 6250ES - User Manual

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Portable Generator Owner’s Manual

This is the safety alert symbol. It is used to alert you to potential personal injury hazards.

Obey all safety messages that follow this symbol to avoid possible injury or death.

5000/6250ES

Model No. 1577-0 (5000/6250 Watt AC Generator) Manual No. 188325 Revision 0 (5/8/2001)

Visit our Generac website: www.generac-portables.com

Questions and Answers

Z
zacharyallenAug 11, 2025
How to fix a Generac Portable Products Portable Generator with no AC output?
- D
  daniel27Aug 11, 2025
  If your Generac Portable Products Portable Generator's engine runs but there's no AC output, try these steps: First, reset the circuit breaker, as it may be open. Check and repair any poor connections or defective cord sets. Connect another device that is in good condition to rule out a faulty connected device. If these steps don't restore AC output, there may be a fault in the generator itself, and you should contact a Generac service facility.
V
valdezphillipAug 18, 2025
Why does my Generac Portable Products 6250ES bog down under load?
- S
  steve25Aug 18, 2025
  If your Generac Portable Products Portable Generator runs well without a load but bogs down when you connect loads, the issue could stem from a few sources. Try disconnecting any shorted electrical loads. Also, the generator might be overloaded. If these steps don't solve the problem, contact a service facility because the engine speed may be too slow or the generator circuit may be shorted.
C
Christopher BranchAug 27, 2025
What causes a Generac Portable Products 6250ES Portable Generator engine to hunt or falter?
- D
  drodriguezAug 27, 2025
  If the engine of your Generac Portable Products Portable Generator “hunts” or falters, try moving the choke to the halfway position until the engine runs smoothly, as the choke may have been opened too soon. If the problem persists, contact a service facility, because the carburetor may be running too rich or too lean.
R
ramosthomasNov 2, 2025
Why won't my Generac Portable Products Portable Generator start?
- A
  Angel EdwardsNov 3, 2025
  If your Generac Portable Products Portable Generator engine won't start or runs rough, several factors could be at play. First, check that the rocker switch is set to “On”. Next, ensure the oil level is adequate by filling the crankcase to the FULL level. Other potential causes include a dirty air cleaner (clean or replace it), an empty fuel tank (fill it), stale gasoline (drain and refill with fresh fuel), a disconnected spark plug wire (connect it), a bad spark plug (replace it), or water in the gasoline (drain and refill). Additionally, overchoking could be the issue (open choke fully and crank engine). If none of these resolve the problem, it could be due to an excessively rich fuel mixture, a stuck intake valve, lost engine compression, or a failed battery, in which case you should co...

Summary

Safety Rules and Warnings

General Safety Precautions

General safety advice and warnings for generator operation.

Health and Environmental Hazards

Warnings about California Prop 65 and carbon monoxide hazards.

Operational Safety Guidelines

Covers safety regarding electrocution, fuel, cooling, and operation.

Equipment Description

Grounding the Generator

Know Your Generator

Generator Components Identification

Identifies and describes key controls and parts of the generator.

Assembly and Battery Installation

Removing Generator from Carton

Step-by-step guide to unpackaging the generator from its shipping carton.

Carton Contents Check

Lists all items included in the generator's shipping carton.

Installing the Battery Tray and Battery

Instructions for mounting the battery tray and securing the battery.

Connecting Battery Cables

Step-by-step instructions for connecting the generator's battery cables.

Before Starting the Engine

Adding Engine Oil

Instructions and precautions for filling the engine with the correct type and amount of oil.

Adding Gasoline

Guidelines for safely adding unleaded gasoline to the generator's fuel tank.

Operating the Generator

Fueling the Generator

Instructions for adding gasoline and avoiding fuel system problems.

Starting the Engine

Step-by-step guide for starting the generator engine using electric or manual start.

Connecting Electrical Loads

How to connect electrical devices to the generator safely and correctly.

Stopping the Engine

Procedure for safely shutting down the generator engine.

Cold Weather Operation

Generator Receptacles

120 Volt AC, 20 Amp Receptacles

Description of the standard 120V, 20A outlets and their usage.

120 Volt AC, 30 Amp Locking Receptacle

Details the 120V, 30A locking outlet and compatible plug.

120;240 Volt AC, 20 Amp Locking Receptacle

Information on the 120/240V, 20A locking outlet and its wiring.

Generator Specifications

Dont Overload the Generator

Calculating Load Wattage

How to calculate total wattage of connected devices to avoid overloading.

Wattage Reference Guide

A guide listing common appliances and their typical wattage consumption.

General Maintenance Recommendations

Engine Maintenance

Refers to the engine owner's manual for engine-specific maintenance.

Generator Maintenance

Focuses on keeping the generator clean and dry.

Cleaning the Generator

Instructions on how to clean the generator's exterior surfaces.

Service and Adjustments

Generator Storage

Preparing for Storage

Guidelines for storing the generator for more than 30 days.

Engine Storage Recommendations

Refers to the engine owner's manual for engine storage procedures.

Other Storage Tips

Advice on fuel storage and general storage area conditions.

Troubleshooting Guide

No AC Output Available

Solutions for when the engine runs but there is no AC output.

Engine Bogs Down Under Load

Addresses issues when the engine runs fine unloaded but struggles with load.

Engine Will Not Start or Runs Rough

Troubleshooting steps for starting problems or rough engine operation.

Engine Shuts Down or Lacks Power

Solutions for the generator stopping unexpectedly or running with low power.

Engine Hunts or Falters

Diagnoses for irregular engine speed or 'hunting' behavior.

Schematic Diagram

Wiring Diagram

Exploded View Diagram

Parts List

Main Components List

List of parts with item numbers, part numbers, quantities, and descriptions.

Battery Tray Components

Specific parts related to the battery tray assembly.

Control Panel Exploded View and Parts

Limited Warranty Information

Warranty Coverage and Exclusions

Details the warranty period, what is covered, and what is excluded.

Disclaimer of Other Warranties

Company's disclaimer of implied warranties and limitation of liability.

Obtaining Warranty Service

Instructions on how to contact the company for warranty service.

Generac Portable Products 6250ES Specifications

General

Model	6250ES
Fuel Type	Gasoline
Engine Displacement	389cc
Voltage	120/240V
Noise Level	72 dBA
Wheel Kit	Included
Starting Wattage	6250 watts
Running Wattage	5000 W
Peak Watts	6250 watts
Engine Type	4-stroke OHV
Outlet Types	4x 120V 20A (5-20R), 1x 120/240V 30A (L5-30R)

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