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Is regular gas harmful?

Discussion in 'Technical Discussion' started by bigear1, Aug 11, 2009.

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  1. bigear1

    bigear1 New Member

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    We have twin Chevy 454's in our vessel. It would be easier to put gas in from a gas station with cans rather than the gas dock at a marina. What is the down side of using non marine gas?
  2. NYCAP123

    NYCAP123 Senior Member

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    I'm a really nice guy. Please name me beneficiary on you life insurance policy right away.:cool: If you're talking about bringing down 5 gals. of gas no problem if you can be very careful pouring. If you're talking about putting 200 gals. in the back seat of your car and, in the unlikely event of your surviving the trip to the marina, pouring it can by can into your boat it will be a toss-up as to what happens first: 1) you blow yourself up 2) your neighbor drowns you for endangering his boat and life 3) the EPA takes your house to cover the fines for spill damage.
    If your 38 is on a trailer (which is a bit hard to picture) go ahead and fuel at your local station with high test. Otherwise, don't go getting killed to save a few cents per gallon.
    P.S. PLEASE run your blower for at least 4 minutes before turning that key.
  3. K1W1

    K1W1 Senior Member

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    In whose opinion?


    Ed- Where is your sense of adventure?
  4. Seafarer

    Seafarer Senior Member

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    The first volunteer fire department I joined, at the ripe old age of 16, has a good sized marina in its fire district. It kept a jet-drive fire boat at the marina primarily for the fun that ensues from people trying to save a couple of bucks, like the OP.

    Call the local fire house that covers your marina and let them know not to get busy cooking any meals while you're working on this project!
  5. NYCAP123

    NYCAP123 Senior Member

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    There was this person I once met......
    It stops just short of fire.:D
  6. CaptPKilbride

    CaptPKilbride Senior Member

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    And BLEVE explosions are not much fun either lol
  7. K1W1

    K1W1 Senior Member

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  8. bigear1

    bigear1 New Member

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    Thank you one and all for all the smartass remarks they are greatly appreciated. However, I was hoping to get an answer to my question. Is there a difference in the additives in regular gas and marine gas. No, I was not planninmg to fill the tanks 10 gal at a time. We just aquired this boat. One tank is empty and the other has a little fuel. I wanted to put gas in each to make it to a marine some distance away.
  9. K1W1

    K1W1 Senior Member

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    Hi,

    In all seriousness :

    Wasn't there some issues with Hi Ethanol levels in Gasoline leading some Class Action suits against the Oil Co's because of the damage it did?

    I am not sure if this was just for Marine Gas or Gas you get from a Gas Station for your car.

    Someone who lives on your side of the pond might be able to shed some light on this.
  10. Capt J

    Capt J Senior Member

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    The answer to your question is yes, you can use street gas in your boat. Marina's usually sell 89 octane gasoline. The marina gas might not have ethonal in it depending on the marina. But in many places both the street gasoline and the marina gasolina has up to 10 percent ethanol in it. Be careful not to spill gas everywhere.
  11. K1W1

    K1W1 Senior Member

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    Hi,

    This empty tank wouldn't happen to be the one that supplies the engine you wrote had run rough and then stopped in your post about Engine Problems would it?
  12. bigear1

    bigear1 New Member

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    Yes it would. As I said in that thread we found out the gas had been in the tanks since 2006. Before I went ahead and started with your suggestions I wanted to start with fresh gas. We were able to drain the little left in the tank. I wanted to make sure I put the right type back in. I'm thinking 10-15 gals should do.
  13. SeaEric

    SeaEric YF Historian

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    Most boat tanks require more than that to hit the pick up. I would suggest 25 to 30 gallons minimum. What size is the tank? You may consider running on a portable tank if its a short distance. That way, you know what you've got.
  14. Marmot

    Marmot Senior Member

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    There is no downside since there is no such thing as "marine gas" despite the claims made by certain distributors who blend their patented mixture of mouse milk and snake oil and call it "marine gas" and sell it on the waterfront.

    In some areas in some states you might be able to buy gasoline that is not blended with ethanol but it's still not "marine gas" it's just gasoline with no ethanol in it.

    Let us know if using fresh gas helps your engine run ... 3 or 4 year old gas sitting in a boat in Florida really is a non-starter.
  15. YachtForums

    YachtForums Administrator

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    Marine gas is actually a very specific formula for extracting one more dollar out of every gallon. ;)

    Back to the question. If you had ethanol blended fuel sitting in your tanks for a long period of time, you have some other potential problems facing you. First, if the boat has fiberglass tanks, ethanol based fuels will attack them. Ethanol is a solvent. The corrosive nature of ethanol can also cause fuel lines to deteriorate.

    Ethanol blended fuel (E-10) can hold up to four teaspoons of water in suspension per gallon. In hot, humid conditions, tanks sweat and it's even more pronounced when ethanol is present. Once a saturation point is exceeded, the solution separates and the gas floats on top while the ethanol and water mix on the bottom. Ethanol blended fuel can absorb enough water to reach a separation point in just over 3 months at 70% humidity. The resulting slurry can clog fuel systems, but the more important problem is that the remaining fuel will lose it's original octane value which can cause an engine to run poorly.
  16. K1W1

    K1W1 Senior Member

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  17. NYCAP123

    NYCAP123 Senior Member

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    That was very disturbing although mostly already known. A very scary new item that I caught from the article is:
    Marmot mentioned earlier 3 months which is what I considered prudent. Most boats don't get run every 2 weeks much less refueled.
  18. bigear1

    bigear1 New Member

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    I have two stainless steel tanks that will hold 210 gal each. More and more I suspect the gas is root of all our engine problems. I will attempt to find ethanol free gas. Do any of the additives work? ie:Stabil etc.
  19. K1W1

    K1W1 Senior Member

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    Hi,

    Thankfully you don't have fiberglass tanks so the Ethanol in Fuel thing won't be as much of a deal as it would have been if you had non metallic tanks.
  20. Marmot

    Marmot Senior Member

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    Maybe, maybe not, the experiment could be expensive. I would try to only tanker what you plan to burn in a short period. After all, how far from a marina pump do you plan to operate?

    If you want longer term stability, buy avgas.