Century FC90 Welder Detailed Review & Specs

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In Brief: Review of Century FC90

Century FC90 welder is known to be the perfect tool for maintenance and mobile welders. This is because of its power requirements and portability. Though it looks small, it is built to last and will give you a run for your money. With an amperage range of 30A to 90A, this flux-cored welder delivers high-quality welds and is meant for steel only.

Century is a brand owned by Lincoln Electric Holdings, an American manufacturer of welding machines and accessories. It was founded in 1895 and is based in Euclid, Ohio.

The Century FC90 is a welder meant for FCAW and has a maximum output of 90A. It operates through wire feed and gun.

It has a sturdy body and is lightweight, making it a handy tool to have in your workshop.

Key Specifications of Century FC90

Century K3493-1 90 Amp FC90 Flux Core Wire Feed Welder and Gun, 120V The Century FC90 takes in power of 120V or 115V, so you can use it in most places. Its automatic thermal protector prevents damage caused by overheating.

It delivers a duty cycle of 30% at 80A. There is infinite voltage control allowing you more precision in weld characteristics. It can weld 18 gauge to 1/4in. steel in a single pass.

Use it for gasless welding as it operates with self-shielded Lincoln Innershield NR – 211 MP.

This machine is designed to be inverter powered. Since it only weighs 19 pounds, you can take it with you on the job.

Key Specs are summarized in the table below – 

Engine power
Input voltage120V
Amperage range30A-90A
Rated output18.5V
Welder typeWire feed
Dimensions8.66in. H x 18.11in. D x 11.8in. W

How to Assemble / Install the Century FC90

Installing Century FC90 is very basic and does not require too much effort. Refer to the owner’s manual and follow their detailed instructions.

It is very important to read all the safety instructions carefully. failure to do so may cause damage to the product or even harm you and your belongings.

In case of any difficulty, watch this video for further assistance:


How to Use the Century FC90

This power tool is a wire feed system and operates according to the general principles of FCAW. It is relatively easy to use and is suitable for amateur welding enthusiasts.

The owner’s manual has detailed instructions on how to operate, maintain, and troubleshoot.

Warranty / Repairs

The Century FC90 comes with a warranty of 6 months for parts and 90 days for labor.

Lincoln Electric Holdings will assume both the parts and labor expense of correcting defects during the full warranty period.

You can access everything you need to know about warranty, repairs, and customer service on their support page.

Customer Review Analysis

We went through several e-commerce websites and online forums to try and understand how customers feel about their Century FC90.

Buyers have mostly given ratings upwards of four stars. They seem to be very happy with the quality of welds and the exceptionally low weight. The shoulder strap makes it quite convenient to carry around.

The arc is fairly smooth and has no problems once the inverted is running on load. The power requirement of 120V lets users operate in most common households.

Except for the limited features, people can’t find anything to complain about. However, another way to look at it is that this machine has been made for one purpose and it serves that purpose very well.

It makes great value for money.


Pros/Cons of Century FC90

After studying various consumer reports, expert comments, and supplementary research, we found the following pros and cons:


  • Smooth arc
  • Inverter based
  • Power requirements suitable for households
  • Portable
  • Lightweight


  • Only FCAW



Does this welder leave residue like an arc welding rod?

Yes, it does. FCAW is self-shielding because it produces slag. To expose your weld, you will need to chip off this residue. It is very important to clean welds before returning with another pass or else you will contaminate the weld.

Can it use wire spools like 0.030 so I can use it to weld body panels on cars?

Yes, it can run 0.030 or 0.035 wire.

What kind of inverter should I use with this? Can I run it on a Honda 2000?

It requires a maximum of 2400W (120V x 20A). Yes, you can. A 2000W Honda inverter will give you 90% of the maximum welder.

Can you weld aluminum with this?

No, you can use this welder for FCAW on steel only.

Our Recommendation

The Century FC90 is one of Lincoln Electric’s most sought after products. This is because of its smooth welds, automatic thermal protection, and portability.

This sturdy little machine will last you a long time and is perfect for small shop welders, DIY hobbyists, and light repairs. It is appropriate for taking on the job if you go door to door for service.

Since it is inverter-based and can plug into 120V or 115V, it is very easy to use in homes. In addition to these features, the affordable price makes this unit a very good buy.

About Harold Henderson

Harold is a fitness freak and spends a lot of time in the gym. He also is a DIY-er and is proud of his collection of power tools. When free, he loves binge-watching Netflix series!

8 thoughts on “Century FC90 Welder Detailed Review & Specs”

    • It CLEARLY says in tHe manual that you can only weld steel. It does not get hot enough to weld ALUMINUM! Most people dont read the maNual, and go straight to the forum asking dumb questions!

  1. I’m trying to start a family business at least get my kids interested in the ARt of welding. I’m at a standpoint with two pieces of equipment that I can afford. It’s a tie between the century 90 AMP flux core welder and the Harbor Freight titanium 125.
    When it comes to power longevity and quality I’m having a hard time deciding which one is better.
    Do you guys have any suggestions about choosing the proper welding machine for starting off.
    I have the old school 85 amp Dual Purpose flux core welder by Century it maxes out at a quarter inch and I’m happy with this little behemoth. Eventually I would like to get my hands on a tombstone stick welder for bigger jobs.
    I don’t really know the difference between a Transformer and the inverter technology.

  2. Century FC90 welder. What is best setting for welding 22 gauge sheet metal using .030 wire? My first try at welding caused burn through and extra fast wire feed. I need help!!!

    • turn your voltage all the way down – 22g might even be too thin. I turned my voltage to MINIMum and wire speed to 6. And barely avoided burn through on 18g. Good luck

  3. This machine was not good, use for several months, it broke down, not only for a year, This machine is not good

  4. if you weld, the wire feed come out, but not spark, this welder have good name but this not good for welder, warranty only six month, but the other they warranty 3 years


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