Going up to LOW this comming weekend, thought I would fill my tank and get the stuff mixed in good. (Never used Seafoam) Usally it does not get into the tank till I get home and winterize it.
By the way mine is a “99” Merc Cruiser 350 Electronic ingtion fuel injected V8 IO.
Usally in the spring on the first trip it takes a while to quit coughing spudering and pinging to get the cobs out of her.
Is that from the Stabil or from fogging the motor?
I would guess the coughing in the spring is from fogging the motor. Seafoam is a great product. I like to run a can of seafoam in my gas 3-4 times a season. (4 stroke 140 Suzuki) In the fall before storage, I add a can of seafoam and some stabil. I haven’t had any problems in the spring.
What kind of ratio do you use?
I’ve got about 55 gallons of gas to treat.
Stabil – 1 oz. treats 2 1/2 gallons
Seafoam – 1 oz. per gallon of gas.
This is info from their websites.
I have had no problems using sea foam and I always try to fill it up with non-oxynated gas anytime its sitting more than a 6 weeks,
I am heading to L.O.W. this weekend to, 
Good Luck
I know this may not affect many of you as you don’t use ethanol, but I do just not in the heat of the summer.
Here is something I found on the two items that makes me wonder about using them
http://www.fuel-testers.com/is_gas_additive_safe_with_e10_list.html
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I know this may not affect many of you as you don’t use ethanol, but I do just not in the heat of the summer.
Here is something I found on the two items that makes me wonder about using themhttp://www.fuel-testers.com/is_gas_additive_safe_with_e10_list.html
After reviewing this info I feel even more confident with my decision to run Techron, Mercury Quickleen, and Marine Stabil with ethanol gas. Amazing how many “gas treatment” products actually contain alcohol and attract water! I quit running Seafoam years ago.
I switched from Stabil to Seafoam years ago after a local large fire dept told me they used it in all their equipment including lots of special equipment that may not see use in over a year. They believed in it and now so do I.
I use Stabil for long term storage or equipment otherwise nothing during the season. If you think you may have a leaky fuel cap or can get water in your fuel than you will want to run something with alcohol to absord the water. The alcohol molecules bond to the water molecules and disperse them. I will also add almost 2X as much before storage.
To all,
First of all THANK YOU! for your personal responces. I have been reading the material that I listed above as well as most all the links to each page and have gotten comments from many individuals on three differant web forum sites. I find conflicting information on the use of E10 in marine and the use of StaBil and Seafoam as well. I have always used StaBil in the past but, only for winterizing. I think I will add SeaFoam as well this year and add both to my tank before we make the trek to the north.
As I read, StaBil and SeaFoam are for two completely differant reasons to use even though they can have certant crossever benefits.
Does anyone think there would be a down side to this?
ie, adding StaBil and SeaFoam to E-10 fuel in a 1999″ 350 hp IO drive.
I wouldn’t bother adding both, but one or the other should do you fine. I have used Seafoam in the past with good results. I still run a tankful in my car and truck on the same interval as my oil changes.
This year, I have been running Marine Formula Stabil. So far, I have been happy with it.
As stated above, I’ve used both products over the years:
Stabil for winterizing.
Seafoam for getting rid of water in the fuel.
Both are great products and both are used for different purposes.
Would it be better to use both for over winter storage or just Sta-bil ?
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Would it be better to use both for over winter storage or just Sta-bil ?
Condensation is why you fill the boat tanks up before storing over winter. A full tank of gas does not allow condensation to form. The less full the tank is, the better chance condensation will occur. No condensation = no water in you’re gas.
I would stick with just Sta-bil.
I see Merc has some new stuff out I use Quikleen all the time and Stabil, but will be switching to all Merc products now
One thing to add to Joel’s statement is that fuel breaks down faster in a tank that is not full, more surface area to react with the air. Another good reason to keep it full or completely empty.
Sea Foam year around. No problems. Use it in every motor I own.
I used to use Sta-bil for storage. Never had a problem. Just don’t like the smell of the stuff when you run it through a 2 stroke.
I run the tank down at the end of the season and fill in the spring with fresh gas.
-J.
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One thing to add to Joel’s statement is that fuel breaks down faster in a tank that is not full, more surface area to react with the air.
The surface area will be the same regardless of how full the tank is (unless your tank is shaped oddly or you really get it plump full). It’s the amount of headspace in the tank that varies, which allows for a small amount of evaporation and condensation to occur.
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As stated above, I’ve used both products over the years:
Stabil for winterizing.
Seafoam for getting rid of water in the fuel.Both are great products and both are used for different purposes.
So…what do you think stabil offers that seafoam does not, that makes you use both? IMO both are used for the same prupose, if not more purposes for the seafoam.
My personally, seafoam in everything but my cars/trucks. Never had an issue with fuel in the 5-6 sleds I have owned and all my small engines or outboard. For winter pour the proper amount of seafoam in, fill up the tank…..and good to go until the next season (then complete the rest of the winterizing process is fogging, etc.).
Heck, I had regular 87 octane gas in my push lawnmower that was stabalized with seafoam (as I always do) and it sat in the shed from last spring until this spring without being started (I don’t use it anymore). My brother was going to take it from me so I decided to pull it out and see if it would run…..a couple pump of the primer and it fired on the first pull and ran great.
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As stated above, I’ve used both products over the years:
Stabil for winterizing.
Seafoam for getting rid of water in the fuel.Both are great products and both are used for different purposes.
So…what do you think stabil offers that seafoam does not, that makes you use both? IMO both are used for the same prupose, if not more purposes for the seafoam.
Both products supposedly do the same thing. They stabilize fuel, clean gum & varnish residue……and so on.
The big difference is that 4oz’s of Stabil will treat 10 gallons of gasoline where as 1oz of Seafoam will only treat 1 gallon of gasoline.
Stabil – 4oz treats 10 gallons of gas.
Stabil – 16oz treats 40 gallons of gas. ($7.58/16oz bottle)
Stabil – marine grade 1oz treats 5 gallons of gas. ($20.29/32oz bottle)
Seafoam – 1oz treats 1 gallon of gas. ($6.75/16oz bottle
Use which ever one you’re comfortable with. I’ve used both as stated above and like them both for the problems I’ve also stated. If Stabil works as a stabilizer and cost a lot less, why use something else that cost a lot more?
Good point on the cost….never really looked at that. Don’t know that I would run the normal stabil, but possibly the marine grade……hmmmm
Fogging oil. How many people use fogging oil ? If you run Sta-bil or Seafoam through your gas and motor ,do you still need to use fogging oil ?
I fog my 2-stroke, carbed motor. Fogging coats the innards in oil to prevent corrosion. I’m pretty sure you won’t get any protection like that from Stabil/Seafoam.
It’s easy and cheap enough, so I don’t chance it.
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