I owe Sea Foam a big thank you for making me look smart.
My neighbor asked me to help get an older outboard running after it sat at his family’s cabin for two years. It had bad fuel, took a while to start and barely idled. We ran to town for new gas, bought a can of Sea Foam and called your tech number for advice on what to do with the old fuel and carburetor. Brian told me to pull the tank line off the primer bulb and idle the engine until it ran out of gas. (With water hooked up.) From there he said to remove the spark plugs, pour Sea Foam into the bulb and fuel line section and crank the engine until Sea Foam filled the carb and chambers, then leave it to soak for a day or two.
After cranking straight Sea Foam into the carburetor and chambers to soak overnight we attached a spare tank of fresh fuel and the rest of the Sea Foam can, put the plugs back in, ran the water hose and fired it up. The engine coughed smoke and shook, then started to smooth out. Within a minute we noticed the engine idle improve and the old carb and chamber gunk turned the prop exhaust water dark (I took a phone video).
Watch what came out of the prop exhaust. The water was a dark grayish black color for about 2 minutes. At that point I was convinced – Brian’s recommendation and what Sea Foam actually did to clean that carburetor was impressive. Now the engine starts and runs like new!
Tom K. in Wisconsin
Here’s the Tom’s video sent in: