Firman L03391 User Manual

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P/N:333745491 Rev:00

OWNER’S MANUAL

Read all safety precautions and instructions carefully

before operating equipment.

Ensure engine is stopped and level before performing

any maintenance or service.

IMPORTANT:

Record product information to reference when ordering parts or

obtaining warranty coverage.

Serial Number:

LPG GENERATOR

MODEL NUMBER

L03391

Rev Level:00

DO NOT RETURN TO

STORE!

CALL US FIRST!

CUSTOMER HOTLINE

1-844-347-6261

FOR QUESTIONS OR SERVICE

INFORMATION

Purchase Date:

Table of Contents

Questions and Answers:

C
Connor FisherAug 4, 2025
Why won't my Firman L03391 start?
- T
  tuckerjohnAug 4, 2025
  There are several reasons why your Firman Inverter might not start: * The indicator light may be off or flashing red, and it needs to be solid red to start. * The oil level might be low. Fill the crankcase to the proper level or place the generator on a level surface. * The air cleaner could be dirty; clean or replace it. * The spark plug wire might not be connected; connect it to the spark plug. * The spark plug might be bad; replace it. * The starting battery may not have sufficient charge; check the battery output and charge it as necessary. * You might be out of LPG; replace the LPG tank. * The LPG cylinder knob might not be open; fully open the LPG cylinder knob. * You might be out of battery power; charge or replace the battery.
J
Jennifer MorrisonAug 9, 2025
What to do if my Firman L03391 engine is running, but there is no AC output?
- G
  Gary DiazAug 9, 2025
  If your Firman Inverter's engine is running but there's no AC output, it could be due to several reasons: * The circuit breaker might be open; reset it. * There might be a poor connection or defective cord set; check and repair it. * The connected device could be faulty; connect another device that is in good condition.
N
nmercadoAug 16, 2025
What to do if Firman L03391 Inverter engine bogs down when loads are connected?
- A
  Albert WoodsAug 16, 2025
  If your Firman Inverter engine runs well without a load but bogs down when you connect loads, consider these possibilities: * There may be a short circuit in a connected load. Disconnect the shorted electrical load. * The generator may be overloaded. See 'Don't Overload Generator'.
P
palmerdavidAug 21, 2025
How to troubleshoot a Firman L03391 engine that lacks power?
- G
  Gail JohnsonAug 21, 2025
  If your Firman Inverter engine lacks power, consider the following: * The load might be too high; see 'Don't Overload Generator'. * The air filter could be dirty; replace it. * The spark arrester might be clogged; clean or replace it.
M
Mitchell WeaverAug 28, 2025
What to do if my Firman Inverter engine shuts down while running?
- R
  Richard HernandezAug 28, 2025
  If your Firman Inverter engine shuts down while running, check these potential issues: * You might be out of LPG; replace the LPG tank. * The air cleaner could be dirty; clean or replace it. * The oil level might be low; fill the crankcase to the proper level or place the generator on a level surface.

Firman L03391 Specifications

General

Starting Watts	3300
Running Watts	3000
Fuel Type	Gasoline
THD	<3%
Outlets	2x 120V 20A (5-20R), 1x 120V 30A (L5-30R)

Summary

Introduction to FIRMAN Generators

Important Safety Information

General safety warnings and hazard identification for generator operation.

Safety Precautions

Carbon Monoxide Hazards

Risks associated with carbon monoxide exhaust from the generator.

California Emissions Warning

Specific safety information for California residents regarding emissions.

Generator Usage Guidelines

Operational Warnings

Maintenance and Repair Safety

Fuel Safety

Liquid Petroleum Gas (LPG/Propane) Hazards

Dangers and safe handling of LPG/Propane fuel for the generator.

Unpacking the Generator

Parts Included Overview

List and identification of all parts included with the generator.

Removal of Shipping Supports

Assembly

Wheel Kit Installation

Step-by-step guide to install the generator's wheel kit.

Support Leg Installation

Steps for attaching the generator's support leg.

Battery Cable Connection

Controls and Features

Generator Component Identification

Visual identification of generator components with numbered labels.

Control Panel Functions

Specifications

Add Engine Oil

Engine Oil Level and Low Oil Shutdown

Instructions for adding oil and information on the low oil shutdown feature.

Connecting Liquid Petroleum Gas (LPG/Propane) Cylinder

Operation at High Altitude

Grounding

Connecting to a Building's Electrical System

Operation

Generator Location and Safety

Proper placement and safety considerations for operating the generator outdoors.

Surge Protection for Electronics

Recommendations for protecting sensitive electronics from voltage fluctuations.

Starting the Generator (Recoil Start-LPG)

Starting the Generator (Electric Start-LPG)

Connecting Electrical Loads

Stopping the Engine

Indicator Light and Battery Saving Mode

Explanation of indicator lights and battery power saving mode.

Low Oil Shutdown

Do Not Overload Generator

Maintenance and Storage

Maintenance Schedule

A schedule outlining recommended maintenance tasks and intervals.

Engine Maintenance

Engine Oil Change Procedure

Detailed steps for changing the engine oil.

Air Filter Maintenance

Instructions for cleaning and maintaining the air filter.

Spark Plug Maintenance

Muffler and Spark Arrester Inspection

Procedures for inspecting and cleaning the muffler and spark arrester.

Generator Maintenance

Battery Replacement

Steps for replacing the generator's battery.

Service and Storage

Battery Charging and Maintenance

Guidance on maintaining the generator's battery and charging system.

Trouble Shooting

Engine Running Issues

Solutions for common problems like no AC output or engine bogging.

Engine Starting and Running Problems

Troubleshooting steps for engines that won't start, run rough, or shut down.

Engine Power and Shut-off Issues

Addressing issues like lack of engine power or unexpected shutdowns.

Parts Diagram and Part List

L03391 Parts Diagram

An illustrated breakdown of the generator's components.

208cc Engine Parts Diagram

L03391 Parts List

FIRMAN 208cc LPG Engine Parts List

Service Information

Contacting Product Service

Information on how to contact FIRMAN for service and parts.

Ordering Replacement Parts

Details on providing necessary information when ordering parts.

Warranty

Warranty Qualifications and Coverage

Details on warranty eligibility, duration, and coverage.

Repair and Return Policy

Procedures for handling repairs and not returning units to the place of purchase.

Warranty Exclusions

Items and conditions not covered by the FIRMAN warranty.

Installation, Use and Maintenance

Warranty Limitations and Exclusions

Clarifies limitations on warranty claims and excluded conditions.

Contact Information

Emission Control System Warranty Statement

Emission Control Parts Covered

Lists the specific parts covered under the emission control system warranty.

Warranty Limitations

Defines what is not covered by the emission control system warranty.

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