
Sea Foam is a fuel additive manufactured by Sea Foam Works. It is used to clean the fuel system of varnish and fuel deposits, carbon from the combustion chamber, and sludge deposits from engine oil. Sea Foam can be used in any gas or diesel engine, including marine engines, and is safe for all fuel types. It is also useful for preventing or overcoming common engine problems, such as rough idling, hard starting, and loss of power. Sea Foam is added directly to the fuel tank, typically before refuelling, and can be used in various engines, including boats.
| Characteristics | Values |
|---|---|
| Purpose | Clean the fuel system of varnish, fuel deposits, and carbon from the combustion chamber. |
| Use | Pour into the fuel tank or oil filler tube. For maximum cleaning, use a full 16 oz can of Sea Foam with 2-3 gallons of fuel. |
| Effect | Sea Foam will not harm the engine or fuel system components. It can be used in any gas or diesel engine. |
| Results | Users have reported white smoke coming from the exhaust and smoother idling. |
Explore related products
What You'll Learn

Sea Foam is safe to use in boat engines
Sea Foam is a fuel additive with several uses. Its primary purpose is to clean the fuel system of varnish and fuel deposits. It also cleans carbon from your combustion chamber to help reduce emissions and allow your vehicle to run better. Sea Foam is safe to use in boat engines. In fact, it is safe and effective in any kind of gas or diesel fuel and any kind of motor oil. It is made with safe ingredients that will not harm your engine or equipment.
Sea Foam is a premium-grade penetrating oil that works hard and lasts long. It is a complete fuel system treatment for all marine engines. It cleans tough road bugs, grime, and other organic residues. It is also effective in cleaning GDI intake valves and other critical upper engine areas. Sea Foam is specially formulated to clean fuel injectors for better engine performance.
Sea Foam is a simple way to keep your engine running strong. It is easy to use. Just pour it into your fuel tank to clean and lubricate your entire fuel system. It works through fuel injectors and carburetors to remove harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas.
Sea Foam does not contain harsh detergent or abrasive chemicals that can harm your engine or fuel system components. It is made from petroleum ingredients and is safe and effective when used in all types of gasoline or diesel fuels and fuel blends. The more Sea Foam you add to the fuel, the better it cleans.
Sea Foam is a great way to clean up fuel injectors. It can be used in any gas or diesel engine. It is safe to use in boat engines and will not hurt anything.
Fox Fuel Lines: Fit for SN95s?
You may want to see also
Explore related products

It can be used to clean the fuel system
Sea Foam is a fuel and oil additive that can be used to clean the fuel system of a boat engine. It is designed to remove harmful residues and deposits from fuel injectors, carburetors, intake valves, pistons, and chamber areas. This, in turn, helps to improve engine performance and fuel efficiency.
Sea Foam is safe to use in all types of gasoline or diesel fuels and fuel blends. It is made from petroleum ingredients and does not contain harsh detergents or abrasive chemicals that could harm the engine or fuel system components. It is recommended to add Sea Foam to the fuel tank of a boat engine, especially before winterizing the boat, to help clean and lubricate the fuel system.
The amount of Sea Foam to be added depends on the frequency of use and the type of engine. For regularly used boats with marine engines, it is recommended to add Sea Foam to a fresh tank of fuel every 3 months or sooner. For small engines, it is suggested to add Sea Foam whenever refueling.
To maximize the cleaning effect, it is advised to add a full 16 oz can of Sea Foam to a low tank (2-3 gallons) and drive until almost empty before refueling. This process helps to ensure that the Sea Foam has worked through the fuel system, cleaning away any residues.
Sea Foam has been recommended by mechanics and engine owners for over 80 years to prevent and overcome common engine problems, including those related to fuel residues, such as rough idling, hard starting, and loss of power.
Fuel Line Size: Bigger Not Always Better?
You may want to see also
Explore related products

It can also be used to clean the engine's oil system
Sea Foam can be used to clean a boat engine's fuel line. It is a fuel additive that can be used to clean the fuel system of varnish and fuel deposits. It also cleans carbon from the combustion chamber, helping to reduce emissions and improve engine performance.
Sea Foam is safe to use in all types of gasoline or diesel fuels and fuel blends. It is made with safe ingredients that will not harm your engine or equipment. It can be used in any gas or diesel engine, and is compatible with all makes and models.
To use Sea Foam to clean your boat engine's fuel line, follow these steps:
- Add a full 16 oz can of Sea Foam to a low tank (2-3 gallons) of fuel.
- Drive until the tank is almost empty before refuelling.
- For maximum cleaning, repeat the above process.
- For regular use, add Sea Foam to a fresh tank fill every 3 months or sooner.
- For small engines, add Sea Foam whenever you refuel.
In addition to cleaning the fuel system, Sea Foam can also be used to clean the engine's oil system. This process is known as an oil treatment. To perform an oil treatment on your boat engine, follow these steps:
- Use about 1/3 of a can of Sea Foam.
- Pour the Sea Foam into the oil filler tube about 100 miles (or less) before an oil change.
- Run the engine for a while to allow the Sea Foam to clean the internals of the engine.
- Do not run the engine for too long, as this may cause issues.
- After cleaning, change the oil and oil filter as you normally would.
By using Sea Foam as a fuel additive and oil treatment, you can help keep your boat engine clean and running smoothly. Sea Foam is a simple and effective way to maintain your engine and prevent common engine problems.
Swisher Mower Fuel Line: Size and Compatibility Guide
You may want to see also
Explore related products

Sea Foam is a good option for spring cleaning
Sea Foam is a leading fuel and oil additive manufacturer, producing a range of products for critical engine areas. Its Motor Treatment product is a premium-grade penetrating oil that works hard and lasts long. It is a complete fuel system treatment for all marine engines, cleaning tough road bugs, grime, and other organic residues.
Sea Foam is a great option for spring cleaning your boat engine's fuel line. It is a fuel additive that can be used to clean the fuel system of varnish and fuel deposits. It also cleans carbon from the combustion chamber, helping to reduce emissions and improve engine performance. Sea Foam is safe to use in all types of gasoline or diesel fuels and fuel blends, and it is compatible with all makes and models. It can be used in small engines and marine engines, and it is a simple and effective way to keep your engine running strong.
To use Sea Foam in your boat engine's fuel line, follow these steps:
- Add a full 16 oz can of Sea Foam to a low tank (2-3 gallons) of fresh fuel.
- Drive the boat until the tank is almost empty before refueling.
- Refuel the tank and drive for at least 20 miles.
- If the boat will be sitting for a while, add a can of Sea Foam to the tank before starting the engine again.
Using Sea Foam in your boat engine's fuel line will help to clean and lubricate the entire fuel system, including fuel injectors, carburetors, intake valves, pistons, and chamber areas. It will remove harmful residues and deposits, ensuring that your engine starts easily and runs smoothly.
Sea Foam is a trusted and recommended product that has been used by mechanics and engine owners for more than 80 years. It is made with safe ingredients that will not harm your engine or equipment, and it is a simple and effective way to keep your boat engine in top condition.
Clearing Fuel Lines and Filters with Iso-Heet
You may want to see also
Explore related products

It can help prevent common marine engine problems
Sea Foam is a fuel additive that can be used to clean the fuel system of varnish and fuel deposits. It can be used in any gas or diesel engine, including marine engines, and is safe for all types of gasoline, diesel fuel, and fuel blends.
Sea Foam can help prevent common marine engine problems by cleaning and preventing fuel residues. Fuel residues are the leading cause of marine engine performance issues, such as rough idling, hard starting, and loss of power. By using Sea Foam, you can keep your engine's fuel injectors and carburetors free from harmful residues and deposits, ensuring better engine performance and smoother operation.
Additionally, Sea Foam is effective in cleaning GDI intake valves and other critical upper engine areas. It can remove carbon build-up from the combustion chamber, helping to reduce emissions and improve engine performance. Sea Foam is also useful for removing sludge deposits when added to engine oil.
For boats, it is recommended to add Sea Foam to the fuel tank, especially when the boat has been sitting idle for a while. This will help clean the fuel system and ensure that any old fuel residues do not cause issues when starting the engine.
Overall, Sea Foam is a simple and effective way to keep your marine engine running strong and prevent common problems caused by fuel residue build-up.
Fuel Line Sizing: ID, OD, and the Perfect Fit
You may want to see also
Frequently asked questions
Yes, Sea Foam can be used to clean a boat engine and its fuel line. Sea Foam is a fuel additive that can be used to clean varnish, fuel deposits, and carbon from the combustion chamber of a boat engine.
Sea Foam is a fuel and oil additive that cleans the engine's fuel and oil system. It removes harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas. It also cleans carbon from the combustion chamber, helping to reduce emissions and improve engine performance.
For boat engines that are used regularly, it is recommended to add Sea Foam to a fresh tank fill every three months or sooner. For boat engines that are not used regularly, it is recommended to add Sea Foam to every tank of fuel.
Yes, it is important to follow the instructions for use and take the necessary safety precautions. Sea Foam should not be poured directly into the air filter, and it is recommended to refer to online videos or a mechanic for detailed instructions on how to add it to the engine.









































