A generator that keeps overheating is warning you that something is wrong with airflow, oil, fuel mixture, load, placement, or internal engine condition. Heat is normal when a generator is working, but excessive heat is not. If the engine smells hot, shuts down, loses power, smokes, trips overload protection, or feels much hotter than usual, you should stop and troubleshoot before the problem turns into a seized engine, burned wiring, damaged alternator, or complete generator failure.

A smoking generator engine is a warning sign you should not ignore. A little smoke at startup may not always mean disaster, especially if the generator has been sitting for a while, but steady smoke, thick smoke, burning oil smell, or smoke that gets worse under load can point to problems that may eventually destroy the engine. The sooner you identify the color, smell, and timing of the smoke, the better your chance of fixing the generator before it fails completely.

Hurricane season is one of the worst times to discover that your generator will not start, keeps shutting off, leaks fuel, trips the overload light, or cannot handle the appliances you need during an outage. A generator is not something you want to test for the first time when the storm is already outside and the power has already gone out. If you depend on a portable or standby generator for emergency power, it should be inspected, serviced, repaired, and tested before hurricane season arrives.

If your generator starts, runs for a short time, and then suddenly shuts off, low oil is one of the first things to check. Many portable generators are designed with a low-oil shutdown system that protects the engine from damage by stopping it before oil starvation turns into a seized engine. That safety feature is helpful, but it can also make a simple maintenance issue feel like a major breakdown.

Generator problems that show up after weeks or months of sitting are usually caused by stale fuel, a dirty carburetor, a weak battery, or corrosion in the ignition and fuel systems. The good news is that most of these issues are common, predictable, and often fixable at home without jumping straight to a major repair bill.

When your generator runs but delivers no power, or the voltage is weak and unstable, it is natural to wonder if the alternator itself is bad. The alternator is made up of two main pieces: the stationary windings (stator) and the rotating field (rotor). The good news is that you can often get a strong clue about which one is at fault using simple checks, basic hand tools, and—optionally—a cheap multimeter.

When a generator engine runs fine but the voltage is low, high, or all over the place, the automatic voltage regulator (AVR) is one of the first suspects. The AVR controls the alternator’s output by regulating the excitation going into the rotor. A failed or weak AVR can leave you with dim lights, fried electronics, or no output at all. This guide walks you through how to safely test and replace a typical portable generator AVR at home.

When a gas generator will only stay running with the choke partially or fully on, it usually means the engine is starving for fuel and running too lean. The choke is artificially enriching the mixture just enough to keep it alive. In most cases, that points to a dirty, varnished, or partially blocked carburetor—not a major engine failure. This step-by-step carburetor repair guide walks you through what to check and how to clean or repair the carb before calling a shop. For a broader look at how fuel, spark and electrical parts fit together, you can also explore the overview in Generator Parts and Repairs.