Is there any difference between regular Sea Foam and Marine PRO? [SOLVED]

Good question, Timothy. Sea Foam Motor Treatment and Marine PRO are similar in that each are made from 100% petroleum cleaning and lubricating oils.

However, Marine PRO is specially formulated to meet all the core requirements that marine engine owners want in a fuel system treatment – it cleans fuel passageways, lubricates, stabilizes fuel, and provides corrosion protection to upper engine areas. It does not contain alcohol, which is something marine engine manufacturers can be particular about.

As far as size and concentration, the 20 oz size of Marine PRO simply allows boat owners to treat more fuel with one can (some boat fuel tanks can be large).

If you do try Marine PRO, be sure to try this to get the most out of it:

Wait until you have a low tank of fuel (1-3 gallons). Add a full can of Marine PRO to the fuel. Run your boat at least 20 minutes if you can (just don’t run out of gas!), and don’t be afraid to run it hard. Then, refill your fuel tank as normal.

For upper engine cleaning (fuel injectors/carburetor circuits & chamber deposits that can affect running performance), it works much better to add the full can to a low amount of fuel for two reasons, 1) the cleaning concentration is considerably greater and, 2) the cleaning effect will start much faster with greater effectiveness. If you were to add Marine PRO to a high volume of tank fuel, it might take several hours of engine running for a lower concentration of the treatment to work its way through the fuel lines and through the engine. Understanding the concentration approach will go a long way in terms of understanding how Sea Foam’s engine products work for overcoming fuel residue restrictions or a rough-running engine. Pay attention to starting, smooth idle, throttle response, hole shot, acceleration, and top speed. The #1 cause of each of these issues is heavier suspended fuel gum and petroleum varnish that restricts fuel passageways. The most important thing Marine PRO does is liquefy and clear away sticky gum and varnish restrictions so the engine can go back to starting fast and running strong.

That’s a rather lengthy answer, but it’s a great way to see what Marine PRO can do.

Hope that helps!