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Technical Seafoam Stories Good or Bad

Discussion in 'The Hokey Ass Message Board' started by Truckdoctor Andy, Aug 17, 2020.

  1. This thread is just for Seafoam, no other additives, we can discuss them later. What is your story and or application of Seafoam? Have you had good success or just a waste of money?

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  2. Doublepumper
    Joined: Jun 26, 2016
    Posts: 787


    Funny you ask. I used some yesterday to fix my string trimmer. Carb was varnished causing hard starting and running crappy. Much better now. I learned about Sea Foam from a Johnson/Evinrude wrench at a boat shop I worked in years ago.
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  3. 325w
    Joined: Feb 18, 2008
    Posts: 5,445


    Keep in the mower fuel.
  4. seb fontana
    Joined: Sep 1, 2005
    Posts: 6,768

    seb fontana
    from ct

    Just put some in my Kawasaki F7 today, bike sits to much and needs to have enrichner on to idle. Ran it some, see how it is in a day or two. Hope it works as carb is behind side cover. Should have put some in last time I ran it.

  5. Gman0046
    Joined: Jul 24, 2005
    Posts: 6,260


    I had a Stihl weed eater which was running and I thought a little Sea Foam in the gas wouldn't hurt and maybe make it run a little better. Could never get the weed eater to start again and finally thru it in the trash along with the Sea Foam. Never again will I use Shit like Sea Foam or any other Snake Oil product.
    Last edited: Aug 17, 2020
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  6. blowby
    Joined: Dec 27, 2012
    Posts: 7,198

    from Nicasio Ca

    Cool bike, let us know if it helps.
  7. winduptoy
    Joined: Feb 19, 2013
    Posts: 2,239


    I've used it to free up carboned up valves in the guides. Seems to go after the carbon. I use it as a fuel stabilizer in the cars setting over the winter. I've got a station that sells no ethenol gas. I usually run the tank low as I can, add Seafoam and completely fill the tank to sit for winter.... So I guess I don't know if it's the non ethenol gas or the Seafoam

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  8. BamaMav
    Joined: Jun 19, 2011
    Posts: 4,645

    from Berry, AL

    Echo requires the use of it in their two cycle engines, guess they think it’s good stuff. Myself, I’m on the fence with it. I’ve used it in a few engines, never have seen any difference in them before or after.
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  9. tubman
    Joined: May 16, 2007
    Posts: 5,375


    I had a friend who swore by it; he called it "Mechanic in a Can".:D

    I also use it as a fuel stabilizer over winter because it's a lot cheaper than "Sta-Bil". It's worked so far.
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  10. bedwards
    Joined: Mar 25, 2015
    Posts: 262


    I've used it in 2 stroke engine to de-carbon. I've seen the results through the spark plug hole. I would assume similar results with a car engine with similar concentrations. I've de-carboned engines over the years with it and by pouring water down the carb while running.
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  11. southcross2631
    Joined: Jan 20, 2013
    Posts: 4,187


    When I was the shop foreman at the Federal Law Enforcement training center a salesman came into the shop and tried to sell some Sea Foam . I thought myself oh great another snake oil salesman.
    He said give me your worse running car. We had this old box top Caprice that got used for surveillance training. It did a lot more idling than driving and since it was a carburetor car it was always getting loaded up and fouling the plugs.
    So I showed him that car. We poured a half bottle down the carb until it choked it out and poured the rest in the tank. We let it set for about 20 minutes and then cranked it up and the car disappeared in a cloud of smoke and when we revved it up big chunks of carbon and shit came out of the tail pipe .All of our old cars had the cats gutted so we knew it wasn't plugged up.
    I had one of my mechanics run it down the street to blow it out and it got better the more we ran it.
    It got back to the shop and idled nice and smooth and ran great.
    Our marine patrol training division ran it in all of their boats. We used it in most of our carbureted cars. I am a believer in Sea Foam. It goes in my lawn mower, weed eater and generator.
  12. stuart in mn
    Joined: Nov 22, 2007
    Posts: 1,859

    stuart in mn

    I've put it in my daily driver on occasion. It seemed to help clear up rough running, and also seems to have worked okay as a fuel stabilizer when the car was stored over the winter.
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  13. patterg2003
    Joined: Sep 21, 2014
    Posts: 658


    I had an ice auger that had not run in about 10 years that my son wanted to try to use. I mixed up a couple cups of fresh 2 cycle gas with some Seafoam. I coaxed motor to run with the auger removed & using some ether. It finally began to run with full throttle after a few starts and stalls. Ran it for a bit then shut if off to let the Seafoam soak in. Ran it again then shutdown for a while to let the Seafoam soak some more. I then started it up & left it idling on a plastic pail for about half hour in the back yard. We could hear the noticeable difference as it ran, the idle got smoother and it got a little quicker. My son used it 2 years ago. My son wanted to use the auger again this winter, I put fresh fuel in then gave it a couple pulls and it started up. That auger is well over 25 years and it runs as well as it ever did.

    What made me try Seafoam was my friends experience. He was given a garden tiller with a Briggs & Stratton engine by a friend cleaning up his mothers estate. Nobody knew when it ran lasted. He flushed the tank out with fresh gas and could not get it to run. A friend told him about Seafoam so he added that to the gas. Over a few days of trying it finally started. He said it ran like crap when it started but he kept it running. The engine got smoother & smoother until it was running like a new motor.

    I think if the fuel system has good integrity then the Seafoam is worth a try to see if a motor will come to life. I did some reading on Seafoam to learn that it is recommended to get it into the carburetor & let it soak for a bit. If the Seafom mix can get into the carburetor then it will go to work. Left it sit for a little time then run it as soon as it starts and let it run for a while. Shut it off for a half hour or so and run it again. I recommend mixing up small batches of fuel at the strongest mix that Seafoam recommends on their site. I think the mixture recommended on the site for cleaning out a fuel system is stronger than the Seafoam recommends.

    A footnote: Our families use Shell premium in all the small engines with Stabil and all of them start & run when their season rolls around. Shell premium is one of the cleanest fuels with no ethanol that will take longer to break down. It is close to Avgas for quality and some use it for that purpose.
  14. Oldb
    Joined: Apr 25, 2010
    Posts: 209


    My fathers off topic F150 has the 5.4 with the dreaded long reach spark plugs, known to break easily when you try to change them. Every fill up now, it gets a can of SeaFoam in hopes that it will eat the carbon on the end of the plugs and let me change them without breakage. Call me optimistic.
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  15. wicarnut
    Joined: Oct 29, 2009
    Posts: 5,209


    IMO Great product. I had an IO sport boat for years that sat too much and carb idle system would be dirty, poor to no idle, someone told me about Seafoam, used it and cleaned it up in minutes after using, another time my gas generator for house when our power goes out, same problem, sits too long between use, cleaned it up. Now I put a can in everything I have that sits/storage and no problems when I go to use items.
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  16. lucas doolin
    Joined: Feb 7, 2013
    Posts: 424

    lucas doolin

    We have had good results using lacquer thinner added at the fuel rail. Adequate preparation is likely the best way to avoid breaking those 5.4 plugs. Especially now since the Fomoco spark plug reimbursement offer has expired.
  17. Boneyard51
    Joined: Dec 10, 2017
    Posts: 4,752


    I use it regularly! When I sold new zero turn lawn mowers, customers would call in that their mower was running a little rough, I would tell them to put a can of Seafoam in it and run a tank full through it, then call me back. Had many get excellent results that way. Beat myself out of a lot of work ( bucks), but was too busy any way! Lol
    We collect old Coleman lanterns and it will fix a lantern that is having trouble, most of the time!
    It get used regularly at my house!

  18. Los_Control
    Joined: Oct 7, 2016
    Posts: 721

    from TX

    I have used it on my ot truck. I may not have needed it, I had a issue where a lot of oil was pulled into the TB and just put a can in the tank after correcting issue.

    I hear it works really well if added into the crankcase to clean a engine. I was hoping to see some responses from that end. ... what about a old flathead with no oil filter and ran on non detergent oil?
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  19. RmK57
    Joined: Dec 31, 2008
    Posts: 1,648


    My 7.3 Ford diesel was having trouble starting in cold weather. I emptied the fuel filter reservoir then filled it up with seafoam, ran it for a 2 minutes to let circulate through the fuel system, shut it off, then let sit for an hour to work it's magic. From my experience I was pleasantly surprised. The engine doesn't crank for more than 3-4 seconds now in colder weather.
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  20. wulf powis
    Joined: Jun 19, 2017
    Posts: 60

    wulf powis

    seafoam is okay for perking up old gas and keeping trimmers and such working over storage but is not good for the oil in your crankcase it breaks it down over time. Seafoam is basically light oil , naphtha, Isopropyl alcohol, and water. mixed about 50/30/10/10 % in that order. Too pricey for what is does my opinion. you can always mix your own cheaper, but a dirty engine will always work better for a short time with it.
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  21. DIYGUY
    Joined: Sep 8, 2015
    Posts: 890

    from West, TX

    Took ownership of a IH gas tractor that knocked. I used it and used it some more waiting for it to blow up. I put seafoam in it and discovered it was carbon causing the knock. A ton of stuff blew out of it and no more knock.
  22. oldtom69
    Joined: Dec 6, 2009
    Posts: 529

    from grandin nd

    20 plus years small engine mechanic at a dealer for Sta-bil-I recommended and used Sea Foam
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  23. deathrowdave
    Joined: May 27, 2014
    Posts: 2,353

    from NKy

    I use it in the tank of the old Harley and the 32 . Treat all gas sitting in cans with it . Not one bad result for me .
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  24. Apache Albert
    Joined: Nov 8, 2018
    Posts: 83

    Apache Albert

    The only issue with Seafoam is that is cant cure a hang over
    I've ran it in everything and only have had great results. I bought a gallon (best 52 bucks ever spent) just for soaking carbs that are gummy and don't wanna waste my carb cleaner.

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  25. RJP
    Joined: Oct 5, 2005
    Posts: 1,760

    from PNW

    20yr old Craftsman riding mower. Exactly one shot glass of Sea Foam every time I fill it with gas It never sits full. It's put up for winter with whatever's left in the tank. Haven't changed the fuel filter, line, air filter or messed with the carb, ever. Hell, I've never changed the oil or filter in it either. Just top the oil off with whatever's laying around at the time that's within reach. New, used, doesn't matter. Damn thing seems to run on neglect, and Sea Foam.
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  26. Fortunateson
    Joined: Apr 30, 2012
    Posts: 3,630


    We don't get cold weather we get chilly weather... LOL
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  27. B.A.KING
    Joined: Apr 6, 2005
    Posts: 3,697


    I've written the why i like it so much on here before and i type slow. I am a firm believer in the stuff.Any time i leave for an out of town show i buy a couple cans to carry with me. GREAT STUFF.
  28. bigdog
    Joined: Oct 30, 2002
    Posts: 593


    I haven't bought a new lawn mower for thirty years. People give me their old ones when they won't run. About 90% of the time a dose of Seafoam gets them going again. If it will run at all I'll dump some Seafoam in it just let it run. As it runs you can hear the difference, it will smooth out and just run better and better. Used it in cars with the old K-Jetronic fuel injection back in the '80s' and 90s', same thing. I'm a believer.
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  29. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 1,555


    Seafoam is great its just that transmission fluid is cheaper...
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