Good question, Mike. Yes, you can just pour it in the gas tank. If there’s still old fuel in there, go ahead and drain as much of it as you can. You’ll want to use a high concentration of Sea Foam in fresh fuel. That will work great to clean up any fuel residues or deposits from the bad fuel that was in it before.

Here’s what I’d do: add 4 oz of Sea Foam and 8 oz of fresh fuel. Then, run it normally until it’s out of fuel.

If you’d like, you can add 1 ounce of Sea Foam per gallon of fuel to every tank after that as preventative maintenance. The Sea Foam will prevent the fuel from degrading as well as prevent fuel gum and varnish from forming (which is the most common cause of engine trouble in small engines).

You can add it to oil as well. It will reliquefy any heavier oil residues that have formed so they can be drained away with the old oil. Add 1 ounce of Sea Foam per quart of oil. Run it for 15-20 minutes before changing the oil.

Thanks for the question, Dave! For routine/preventative maintenance in a John Deere lawn mower, add 1 to 2 ounces of Sea Foam Motor Treatment per gallon of fuel. This will help clean the fuel system and prevent fuel from breaking down.

For occasional cleaning (once a year), use a higher concentration by adding a half can (4 ounces) to a small amount of fuel, like a half-gallon. Run the engine until the treated fuel is used up. This helps clean stubborn fuel residues and varnish.

If you have more questions, let me know! Happy to help.

Does sea foam help in starting you chain saw

Hi Mark,

If your chainsaw won’t start, I’d check out this page on how to fix a gummed-up carburetor. That’s very often the problem when a small engine like a chainsaw won’t start. Let me know how it goes!

https://seafoamworks.com/wp-content/uploads/2024/04/HOW2_Gummed-Up-Carburetor.pdf

Thanks for the question, Robert! Sea Foam Motor Treatment lasts a long time. An unopened can will work for decades. Once opened, if the cap is closed tight and the liquid is clear, it will still be fine to use for many years. I’d go ahead and use it.

Here is a video that explains more about the shelf life:
Does Sea Foam Motor Treatment have a shelf life?

If you have more questions, please let us know!

Thanks for the question, Durand!

Here’s an excerpt from a page on our site about what to do with a snowblower that isn’t starting right. You’ll want to drain most all of the gas (which you can still use since it’s fresh) in the tank so you can create a high concentration of Sea Foam, and follow the directions below:

“If the snow blower isn’t starting due to a gummed up carburetor or other gum/varnish issues in the fuel system, Sea Foam will help clean it up and get it running again. Here are step by step instructions for how to use Sea Foam:

• Remove the old fuel from the tank, then drain the fuel from the carburetor (usually a screw)
• Add a cleaning dosage of Sea Foam to an empty tank followed by a small amount of fresh fuel (a 1:2 ratio of Sea Foam to fuel is a good cleaning dose. Add 4 oz of Sea Foam and 8 oz of fuel).
• With Sea Foam mixed in the tank fuel, rope pull/crank or press your primer bulb 3 or 4 times to draw the fresh fuel and Sea Foam into the carburetor
• Then let the engine sit overnight to allow the Sea Foam to dissolve any fuel residues from the carburetor (older or excessive gum/varnish may need to soak two to three days).
• Once the engine starts, the Sea Foam in the fuel will continue to clean and help restore lost engine performance.”

Here’s a link to the full page: https://seafoamworks.com/fix-a-hard-starting-snow-blower/

Thanks for the question Tony! You can add Sea Foam as often as you’d like. It won’t hurt anything.

However, if you are driving a vehicle regularly, you don’t need to add it to every tank of fuel. A high concentration (two 16 oz cans in a low tank) every 3,000 miles or every 2-3 months is plenty to keep your engine running clean.

If it doesn’t get driven regularly, then adding a can to every tank will prevent gum and varnish from forming while it sits.

Note that in small engines you’ll want to add Sea Foam to every tnak since they often don’t get run every day.

Hope that helps and let me know if there’s anything else!