Firman

Firman Petrol Generator Repairs & Servicing

Brand: Firman
Fuel: Petrol
Service: Repairs, servicing and fault finding
Quote: Free and in writing, before any work
Hours: Open 24/7
Response: On site within 1 hour

Firman offers conventional open-frame petrol sets and inverter generators, including inverters in an open frame. We repair and service Firman petrol generators on site across Gauteng, after confirming your set is built for our 230 V supply.

Independent service and repair: Firman is a trademark of its owner, and ProService Generator Repairs is not a Firman dealer or agent.

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Callout fee waived when you accept our written quote. 1-year workmanship guarantee. See prices

Firman Generator Repairs & Servicing

Firman generators are sold in several countries at different voltages. Before any electrical work, we check the data plate to confirm your set is a 230 V, 50 Hz model suited to South Africa.

Conventional models such as the RD3910EX pair electric start with a recoil backup, so a flat battery need not leave you without power. Open-frame inverters behave like inverters electrically, even though they look like conventional sets.

Firman Petrol Generator Ranges and Design

Firman, sold in some markets as Sumec Firman, offers conventional open-frame petrol sets and inverter generators, including inverters in an open frame.

Conventional open-frame models
Inverter models
Electric-start models

Firman models you may own

RD3910EX: Conventional open frame; 2.8 kW; electric start with recoil backup; 15 L tank (Nigerian listing).
W03663OF: Open-frame inverter; 3,650 W running, 4,500 W starting; remote start; CO alert (US listing, 120 V market).

Specifications vary by market and year, so the data plate on your Firman confirms the exact model. Sources:

What We Check First on a Firman

A set that shuts itself off
Some Firman inverters, such as the US-market W03663OF, have a CO alert that stops the set if carbon monoxide builds up. If a set with this feature shuts down, move it into open air and check the exhaust path before restarting.
The RD3910EX’s 15 L tank
The RD3910EX carries a 15 L tank. Fuel left in it for months varnishes the carburettor, so after storage we drain and clean before we judge the engine.
Remote start that does not respond
Remote-start models depend on the battery and the receiver. We test the battery and the start circuit, then the remote, before suspecting the engine.

Firman Petrol Generator Repairs and Servicing

On a Firman, we start from the symptom. We prove fuel, spark and compression before we strip a carburettor, and we measure the output once the engine runs steadily. Servicing follows the schedule in the owner’s manual for your model.

On inverter models, we test the inverter module and the electronic throttle control before ordering a model-specific part.

On conventional sets, an AVR or a capacitor holds the voltage, and a fault there is a common reason a set runs but gives no power.

Electric-start models add a battery and a starter circuit, and we check those first when the set only clicks.

Frequently Asked Questions About Firman Petrol Generators

What types of Firman petrol generator are there?

Firman, sold in some markets as Sumec Firman, offers conventional open-frame petrol sets and inverter generators, including inverters in an open frame.

Which Firman petrol generator models do you work on?

Firman models you may own include the RD3910EX, W03663OF. Specifications vary by market and year, so the data plate on your generator confirms exactly which one you have.

Why does my Firman generator switch itself off?

Low oil, overload and running out of fuel are the usual reasons, and models with a CO alert also shut down if carbon monoxide builds up. Move the set into open air, check the oil and the load, and call us if it keeps happening.

Do you service and repair Firman generators?

Yes. ProService Generator Repairs services and repairs Firman petrol generators. We work on site across Gauteng, 24 hours a day. If your set is still under warranty, keep the proof of purchase handy and check the supplier’s warranty terms before work starts.

Firman Generator Repairs Across Gauteng

We repair Firman open-frame and inverter sets at homes and workshops across Gauteng. We are open 24/7, and for a Firman breakdown we arrive within 1 hour.

Need Firman Petrol Generator Repairs?

Send a photo of your Firman plate so we can confirm the voltage, then call or WhatsApp 082 057 4605.