Which Sea Foam product to run in 2007 Searay Sundancer 290 with twin v-6motors, 220 hp each? [SOLVED]

Thanks for the question, David. Use Marine PRO. It will clean and lubricate the entire fuel system, as well as prevent gum and varnish from forming in fuel. Works great in marine applications.

Here’s how I’d recommend using it depending on what your goals are:

• For routine, everyday maintenance: add 1 ounce of Sea Foam per gallon of fuel. It does come in 1-gallon jugs that you can get at NAPA or other auto parts stores (you might have to have them order it, but I looked up a NAPA in your area and it said they could ship to store for pickup the same day). Adding Marine PRO to every tank of fuel is best practice for keeping a fuel system clean and preventing common fuel-related problems
• For periodic high-concentration cleaning, wait until you have a low tank of fuel (1/4 tank or so), add a high concentration of Marine PRO (at least 2-4 oz of Marine PRO per gallon of fuel), and use up as much of the treated fuel as you’re comfortable with before refueling.