Well, they're quite different products, although it's fair to call them both snake oil. Sea Foam is a solvent, Marvel Mystery Oil is a lubricant.
I've tried Sea Foam to clear the gunk out of a gummed-up carb. It didn't seem to help, although some folks claim it works wonders. I always end up tearing down the carb.
Now I religiously add a bit of MMO to each five gallons of gas I buy, and I use that gas in my tractor, lawn tractor, generator, lawn mower, etc. I really believe it helps prevent valves from sticking when an engine sits without running. Of course that's just my opinion. I suppose a dab of motor oil in the gas would work just as well.
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Today's Featured Article - The Engine Rebuild Kit - by Curtis Von Fange. I always liked engine rebuild kits. They have all the replacement parts for overhauling an engine without going to the store to get gaskets, special measuring tools, or miscellaneous parts. They come neatly packaged, clean and tidy. But it's important not to let that packaging lull you into a false sense of security. The appearance of matching sleeves, pistons, rings, and bearings can cause frustration and agony if not properly measured and installed in a workshop environment. Following c
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