Is Sea Foam good for a 4.3 liter V6 Mercruiser marine engine? [SOLVED]

Sea Foam Marine PRO is safe and effective in your Mercruiser. Marine PRO works through the fuel system to clean fuel residues and varnish that often cause common marine engine problems (rough idle, loss of power, hard starts). Adding Marine PRO to your fuel is an easy way to overcome or prevent these problems.

I’d start by doing this:

Wait until you have a low tank of fuel (2-4 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.

After that, you can add Marine PRO to every tank of fuel as preventative maintenance. Add 1 ounce of Marine PRO per gallon of fuel.