Keeping your fuel fresh

Discussion in 'Sport Boats' started by mrtopknight, Oct 3, 2006.

  1. mrtopknight

    mrtopknight New Member

    361
    Oct 3, 2006
    Lake Mary, FL.
    2001 182 Sport
    4.3L MerCruiser w/ alpha one
    Sometimes I go a couple of months without running my boat. How long will the gas stay fresh, and what can you do to keep it fresh?
     
  2. STIHLBOLTS

    STIHLBOLTS New Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 3, 2006
    Panama City Beach Fl/ South Ga
    2004 - 220 Sundeck
    5.0L w/Bravo 3 Drive
    Either "Sta-Bil" or "SeaFoam" products added to the gas tank will hold the fuel over for a while. :)
     
  3. chuck1

    chuck1 Super Moderator TECHNICAL Contributor PLATINUM Sponsor

    Oct 3, 2006
    North GA Mountains
    Looking For Next One
    Looking For Next One
    Shame on you for not taking that pretty SeaRay out for a couple months at a time :lol:. Since I've got 189+ hours on my 240 Since March of 06 have not had to use anything in the gas on it yet. Boy am I glad gas prices are going down. :D I do use "Sta-Bil" in the jet skies when I put them up for the winter and never had a problem yet. I'm also one of the keep it full when you lay it up guys. Just had to do the Winterize of them last week :cry:
     
  4. mrtopknight

    mrtopknight New Member

    361
    Oct 3, 2006
    Lake Mary, FL.
    2001 182 Sport
    4.3L MerCruiser w/ alpha one
    Thanks guys!! I guess I will go with Sta-Bil if it sites for more than a month or so. I'm taking her out this weekend :lol:
     
  5. mrsrobinson

    mrsrobinson New Member

    Mar 9, 2006
    Richmond, Virginia
    1995 Sea Ray 330DA - Sold
    2001 Regal 3780 - Sold
    Big ones
    Sta-Bil is your best friend. Per the experts, E10 (10% ethanol fuel) fuel starts to break down as soon as it leaves the refinery and is good for only 60-90 days.
     
  6. lakejumper

    lakejumper New Member

    17
    Oct 3, 2006
    Northern, CA
    boatless
    boatless
    I put Sta-bil in for the winter and keep in storage for 6 months. I keep the tank full to prevent condensation. It starts right up in the spring. I know... I'm in California and should be using her in the winter! I
     
  7. Alex D

    Alex D New Member

    Oct 2, 2006
    Smith Mountain Lake, VA
    2004 240 Sundeck
    Mercruiser 5.0 MPI B3
    I vote for stabil too :thumbsup:
     
  8. sbw1

    sbw1 Well-Known Member

    Oct 10, 2006
    West Michigan
    This is listed in my signature
    This is listed in my signature
    Stabil is supposed to keep fuel fresh for 12-18 months. It will not keep e10 fresh for that long because e10 loses its octane over 60-90 days and stabil has no effect on octane. It keeps the gas from varnishing and sludging up. If you go through fuel every 2-3 months you probably need no fuel freshners. We go through a lot of gas but our boat runs on October gas until the following July. Then it's a tank every 3-5 days until early August when we use only 2-3 tanks until October. Our fuel filters show very little crude when changed in October. We do add stabil in October to get us to the April launch date. I think you can overdo the treatment. It causes no harm, but you could spend the money on something that is more fun. :smt001
     
  9. chuck1

    chuck1 Super Moderator TECHNICAL Contributor PLATINUM Sponsor

    Oct 3, 2006
    North GA Mountains
    Looking For Next One
    Looking For Next One
    What happens if you use to much Stabil?
     
  10. sbw1

    sbw1 Well-Known Member

    Oct 10, 2006
    West Michigan
    This is listed in my signature
    This is listed in my signature
    If by too much you mean you add a little too much (5-10% say) you end up with smelly exhaust. Not sure what would happen if you really overdo it although you would probably lower the octane and get less miliage if you have computerized fuel management. Our exhaust is a little stinky until we start cruising and going through fuel. Then the smells go away.
     
  11. Alex D

    Alex D New Member

    Oct 2, 2006
    Smith Mountain Lake, VA
    2004 240 Sundeck
    Mercruiser 5.0 MPI B3
    STABIL recommends to double the standard rate for long term storage, like one year or beyond. Based on that it seems that it's hard to overdo it with stabil.
     
  12. lakeman

    lakeman New Member

    7
    Oct 21, 2006
    Georgia/ Lake Lanier
    winterize ?

    We winterized our 89' 340 Dancer yesterday........... I walked to the service panel and flipped the switch marked "bilge heater"........sorry I could'nt help it
     
  13. Alex D

    Alex D New Member

    Oct 2, 2006
    Smith Mountain Lake, VA
    2004 240 Sundeck
    Mercruiser 5.0 MPI B3
    Hope you also checked that it actually works after sitting in there all summer :grin:
     
  14. lakeman

    lakeman New Member

    7
    Oct 21, 2006
    Georgia/ Lake Lanier
    bilge heater

    The heater comes with a spray, to test t-stat each season, although the weather usually doesn't present a problem.
     
  15. Timayz

    Timayz New Member

    6
    Nov 4, 2006
    I like Sea foam. You also get a cleaning when you use it. Make sure to run it after you put it in. This will mix it up in the tank and assure you get it up in the lines/carb or injectors.
    Sea Foam is also one of the few fuel system cleaners I have found to work VERY VERY Well. It goes in everything I own over the winter.
     
  16. Searay Jim

    Searay Jim New Member

    271
    Oct 3, 2006
    DFW
    240 Sundeck
    540cid w/BIII
    I've always used the rule of thumb that octane rating starts dropping and drops about 1 every 45-60 days. Mine is more octane sensitive so I put her up with about 1/4 tank then add 93 octane before running then next time. If it's a rogue visit to the lake suring the wimter I'll probably only add about 1/4 to 1/2 tank and take it easy if it's been sitting for 2+ months. In spring I'll top it off with 93 and still take it easy until the 2nd fill with fresh 93 octane. From there I try not to keep it full unless I kow I'l be buring that gas within a month. Generally I keep it about 1/2 ro 3/4 full and top it off more often.

    As for winter, I put her away already but didn't bother doing anything with the fuel. I planned on adding Stabil and may still pull her out and add 10-15 gallons of 93 and some Stabil if it looks like she'll be resting for a while. It's already been 3 months (Labor Day) since we had her out. :smt089 When I brought her home to change oil and drain the block, even sitting that long and it being upper 40's, she fired right up! :smt001 I feel better if I at least fire her up once a month or so just to keep the fuel moving. It also helps get her warmed up and stay warmer before a really cold night.
     

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