I'm the office administrator for a 45-person equipment rental and maintenance company. I handle purchasing for our shop and field locations—roughly $100,000 a year across 10 vendors. Most of that is small parts, consumables, and the occasional backup generator. I don't rebuild engines for a living, but after five years of ordering and fielding complaints, I know which decisions cause the 3 a.m. phone calls.
This article is a comparison: an old Briggs and Stratton generator vs. a new one. Not a short list of pros and cons. I'm going to compare them the way I actually evaluate them for our business—maintenance, power quality, total cost, and certainty.
Why compare old and new Briggs & Stratton generators?
Customers ask me whether they should buy an old Briggs and Stratton generator or spend more on a current model. It's tempting to think the answer is obvious. Newer must be better. But that's an oversimplification. A 20-year-old unit with a clean carburetor and a fresh spark plug wire can run circles around a brand-new generator that has never been started.
The reverse is also true. A new generator with an inverter and a transfer switch can do things an old unit can't. So let's break it down by the questions that matter.
Dimension 1: Parts and maintenance
This is where old vs. new gets interesting. Old carbureted engines are simple. Newer engines often have more electronic components, but they can also be easier to manage if you have a dealer nearby.
Carburetor for Briggs & Stratton generator: old vs. new
A carburetor for Briggs & Stratton generator is one of the most replaceable parts I've ever ordered. It's usually under $40 from a decent supplier, and the install is basic: take the old one off, swap a gasket, put the new one on. The catch is fuel. Stale E10 can gum up a carburetor in three months if the generator sits in a shed. If you run it monthly and use stabilized fuel, it'll run for years.
Newer units aren't all fuel-injected. Many still use carburetors, but the emission controls and electronic choke can make them more sensitive. That's not a reason to avoid new. It's a reason to read the spec sheet instead of assuming one engine is the same as another.
Conclusion: For ease of repair, old wins. For someone who doesn't want to learn how a carburetor works, new is less intimidating.
Spark plug wire: the failure everyone ignores
A brittle spark plug wire is the silent killer of old generators. It can look fine and fail under load. In 2023, I had a used unit that clicked over but wouldn't start. The engine was fine. The spark plug wire was cracked on the inside. If you're putting an old Briggs and Stratton generator into service, replace the spark plug wire before you need it. Cost is low. Downtime is high.
Newer units have ignition components that can fail, but they tend to be modular. The tradeoff is price. A modular coil can cost three times as much as a wire. But you don't have to guess where the problem is.
Conclusion: Old is easier to troubleshoot for a mechanic. New is easier to repair for a technician who reads diagrams.
10amp battery charger: the accessory nobody budgets for
This one isn't old vs. new. It's smart vs. unprepared. If your generator has an electric starter, a 10amp battery charger belongs on your shelf. I use mine every spring to top off the starting battery before storm season. A dead battery is a cheap problem that forces an expensive plan.
Buy a 10amp battery charger that can handle more than one battery type. You don't want to discover in October that your charger doesn't support the AGM battery you installed in June.
And don't charge a battery inside a running generator. I know that sounds obvious, but it happens every year.
Dimension 2: Power quality and surge protection
This is the dimension most buyers ignore. It's also where 'cheap' generators become expensive.
Is a power strip a surge protector? No.
Let me answer the question directly: is a power strip a surge protector? No. A power strip is a set of outlets with a breaker, and sometimes a switch. A surge protector contains components that clamp down on voltage spikes. The difference matters when you're running computers, chargers, or anything with a circuit board.
Per FTC guidelines (ftc.gov), marketing claims have to be truthful and substantiated. If a product is sold as a surge protector, it should actually have surge suppression inside—not just a row of outlets. So when someone says 'a power strip is enough,' that's a misconception with real consequences.
For generator use, the cleaner the power, the less you need to rely on surge protection. But you should still have it. A voltage spike from a loose neutral or a faulty transfer switch can fry equipment that a power strip won't save.
Old generator vs. new inverter generator: clean power matters
Older generators produce electricity that's perfectly good for tools, lights, and motors. They are not ideal for sensitive electronics. The frequency can drift as the engine strains. New inverter models produce much cleaner sine-wave power. If you're powering a laptop charging cart or medical equipment, this is not a minor detail.
There's a reason inverter generators cost more. They buy you certainty. That's the same logic I use when deciding whether to pay more for a guaranteed delivery date.
Conclusion: New inverter units win this dimension. But for shop tools and battery chargers, an old unit is fine.
Dimension 3: Total cost of ownership
I've made the mistake of looking only at the price tag. A used generator for $700 seemed like a win. Then I spent $120 on a carburetor for Briggs & Stratton generator, $35 on a spark plug wire, $60 on a battery, and an entire afternoon of labor. That $700 unit became a $950 unit with zero warranty.
Is that always a bad deal? No. If you have in-house maintenance and you can tolerate downtime, a $950 old unit that runs for five more years is a good investment. The problem is not knowing the difference.
New generators have higher acquisition cost but predictable startup. They also carry a warranty that doesn't require you to trust the previous owner's story.
Counterintuitive conclusion: the cheapest old Briggs and Stratton generator is often more expensive than a new one when you calculate the cost of troubleshooting. But a well-documented old unit with maintenance records can be a fantastic value.
Dimension 4: Time certainty—when price stops being the question
In March 2024, one of our site managers called to say the existing backup generator didn't start during a drill. The unit was an old gas generator that had been 'fine' in September. It turned out the spark plug wire had corroded and the fuel valve was leaking.
We needed a replacement on-site by Friday. A local supplier had two options: a lower-priced unit with 'probably by Friday' delivery, and a newer model with guaranteed Thursday delivery. The difference was $400.
I paid the $400. The cheaper option would have blown our drill schedule and made me look bad to my VP. That's the time certainty premium. In an emergency, 'probably on time' is not a plan. The same logic applies to parts. If a carburetor from a random seller saves $15 but arrives after the outage, it costs more than the genuine one.
So for emergency backup, I favor new or factory-rebuilt units with a delivery date, not a hope.
Which should you buy? A scenario-based answer
Don't ask 'which generator is better?' Ask 'which generator is better for this specific situation?'
- Choose an old Briggs and Stratton generator if: you have a maintenance person who can rebuild a carburetor, the unit has compression, and it's not running life-safety or sensitive electronics.
- Choose a new generator if: you need it to work with a transfer switch, you're protecting computers or medical devices, or you don't want to become a weekend mechanic.
- Choose an inverter generator if: power quality is critical and you need quiet operation.
- Choose a conventional new generator if: you're running power tools and heating equipment where slight frequency drift doesn't matter.
Too many buying decisions start from 'what's the lowest price?' Instead, start from 'what's the cost of being wrong?' That's the question I now ask before every generator order.
Final thoughts
An old Briggs and Stratton generator can be a workhorse. A new one can be the difference between a boring day and a disaster. Neither is universally better. But if you understand the maintenance, the power quality, and the value of a guaranteed delivery date, you're already ahead of most buyers.
There's something satisfying about a generator that starts on the first pull after sitting for six months. The best way to get that feeling is to make the choice honestly, with all the costs on the table. For my money, the practical setup is this: keep a newer inverter generator for electronics, and maintain an old unit with a fresh carburetor, spark plug wire, and a charged battery for the heavy jobs. That combination has kept our operations manager happy for two straight storm seasons. And that's the real metric I'm measured on.