HOW TO USE SEA FOAM FOR ENGINE STORAGE AND STABILIZING FUEL
BENEFITS
DIRECTIONS
SUMMARY
Sea Foam Motor Treatment works to stabilize stored fuel up to 2 years. Adding Sea Foam to stored tanks helps fuel resist evaporation, preserves ignition vapors, adds protective lubricity, and prevents the formation of gum and varnish in fuel systems. Gum and varnish residues are the most common cause of poor engine function. Using Sea Foam in stored fuel will help your engines start easier and last longer.

what is a fuel stabilizer and what does it do?
RELATED QUESTIONS
My craftsman 123cc snowblower starts and then shutdown. I last used it last winter.
Thanks for the question, Charles.
What you’re describing is very common with small engines that have been sitting. In most cases, this happens because fuel gum and varnish formed in the carburetor while the fuel sat. That residue restricts fuel flow and causes engine problems.
If fuel varnish is the issue, Sea Foam can help clean it up. The best way to do that is to use a high concentration of Sea Foam Motor Treatment (or High Mileage) so it can clean the gum and varnish quickly and effectively. Here’s what I’d do:
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Drain the fuel
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Add a high concentration of Sea Foam and fresh gas (up to about a 2:1 ratio of gas to Sea Foam)
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Run the engine as long as you can to pull the treated fuel into the carburetor. If it won’t stay running, prime it or pull the starter rope several times to help draw the treated fuel into the system
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Shut it off and let it sit overnight
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Start it up the next day and let it run for a while
Once it’s running normally again, you can switch to adding 2 ounces of Sea Foam per gallon of fuel to keep the fuel system clean and help prevent this from happening again.
How would Sea Foam affect the performance my 2 cycle lawn mower?
Thanks for the question!
Sea Foam can help the performance of your 2-cycle lawn mower in a few important ways. The most common cause of rough running, hard starting, or loss of power in small engines is fuel gum and varnish that builds up over time. Sea Foam works to liquefy and clean those residues anywhere fuel goes, so the engine can get back to running the way it should.
Here’s how it might help if you have fuel gum and varnish:
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Easier starting
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Smoother idle and throttle response
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More consistent power under load
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Fewer fuel-related problems when the mower sits between uses
Sea Foam will also help prevent gum and varnish from forming while it sits, and add lubricity to fuel.
Add at least 2 ounces of Sea Foam per gallon of fuel. If it hasn’t been cleaned before or it’s running poorly, a higher concentration will clean faster and better.
Will Sea Foam work on a 2017 Chevy Malibu hybrid?
How much Sea Foam can I place directly into a chainsaw or a weedeater?
Thanks for the question!
You can safely use Sea Foam in both a chainsaw and a weedeater. The amount you add depends on what you’re trying to achieve:
For regular use / preventative maintenance: Add 2 ounces of Sea Foam per gallon of fuel. This will prevent gum and varnish from forming as well as prevent the fuel from degrading.
For a strong cleaning (if it’s running rough or hasn’t been cleaned before): Create a high cleaning concentration with something like the following ratio:
- 8 oz of Sea Foam in 16–32 oz of fuel (up to a 1:2 ratio of Sea Foam to gas)
Run the engine for a few minutes to pull the treated fuel into the carburetor, then let it sit and soak overnight. After that, run it as normal. The high concentration works very well to clean varnish and residue from small engine fuel systems.
It’s safe to use a lot of Sea Foam in small equipment like that and it works well to clean.
Can I use Seafoam Motor Treatment to stabilize fuel over the winter in a 2025 Hyundai Palisade?
Thanks for the question. Yes, you can use Sea Foam Motor Treatment for storing your Palisade over the winter. It’ll prevent fuel from degrading, preserve ignition vapors, and prevent fuel gum and varnish from forming while it sits. I’d add a can or two of Sea Foam to the fuel tank and be sure to drive it (25-50 miles) at some point before you store it so the treated fuel gets drawn through the system.

Jim D.TECH
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