User manual Generac GP3300i (English (2025)

FAQs

How much oil for a Generac GP3300? ›

Oil Capacity 0.634 qt (0.6 L) Run Time at 50% Load 10.2 Hours * Go to Generac.com or contact an IASD for replacement parts.

There could be multiple reasons for a Generac generator not starting. These reasons range from a decrease in the oil level, an empty fuel tank, choke malfunctioning, a closed or clogged fuel valve, a clogged carburettor, a spark plug not working properly, a dead battery, and unclean air filters.

Although there are many variables, Generac backup generators have an average of 3000 lifespan operating hours.

Engine oil capacity ranges from 1.1 to 1.9 quarts depending on size. 4. The Generac engine requires an oil change every 200 hours, or every 2 years, whichever occurs first.

For every 100 hours or every year: Change the engine oil and inspect/clean the spark arrestor. (When changing the oil, use only Generac 5W-30 Full Synthetic oil to protect and prolong the engine's life.) For every 200 hours or every year: Clean or replace the air filters.

As a general rule, a generator should be exercised without a load between once a week and once a month. Testing with a load should be done on a monthly or quarterly basis. Your generator's exercise cycle may be automated by a timer, which ensures the generator is tested on a regular basis.

As long as there is a fuel supply of natural gas or propane, a well-maintained backup generator will keep running. If the Generac generator is running on propane, with a 500-gallon tank, it should run 24 hours a day for over a week. There are 24-hour, 48-hour, and 72-hour tanks available.

Home standby generators require regularly scheduled yearly maintenance to ensure proper operation and longevity.

The Most Common Causes of Generator Failure (No-Start)

Here are the things that should get routine service, and why: The generator battery. The overwhelming majority of Generac generator failures have to do with an old or damaged battery.

Reset Button Placement

However, it's usually found on the control panel of the unit. The control panel is typically located at one end of the generator and is easily accessible. In some models, the reset button may be located under a protective cover to prevent accidental tripping.

Why is my generator not kicking on? ›

One of the most common reasons a generator will not start is due to a battery failure. Often this could be caused by a loose connection or a sulfation build-up (a build-up of lead sulphate crystals on the plates of lead-acid batteries).

For example, if your generator has a fuel consumption rate of 0.75 gallons per hour and a fuel tank capacity of 5 gallons, your generator can theoretically run for about 6.67 hours on a full tank of gas.

You can run the generator for a week if necessary, but if you can shut it down daily, allow it to cool and check the oil it is the recommended practice. There are multiple factors that can radically modify the kind of consecutive runtimes you can expect.

On average, a standby generator can run for up to 3,000 hours powering a medium-sized home, though it is recommended you do not run a generator for longer than 500 hours continuously.

The best way to avoid premature wear and tear that could affect run times is to keep the equipment lubricated. Similar to getting an oil change in your car, Generac recommends replacing the oil every 50 hours of cumulative usage.