Dreaded topic (winterization)

Discussion in 'General Discussion' started by boatman37, Sep 13, 2019 at 9:05 PM.

  1. boatman37

    boatman37 Well-Known Member

    Jun 6, 2015
    pittsburgh
    2006 Crownline 250CR. 5.7 Merc BIII
    Previous: 1986 Sea Ray 250 Sundancer. 260 Merc Alpha 1 Gen 1
    5.7 Merc BIII
    So I will probably be pulling our boat in a week or two. A little early but son is getting married in October and we will be busy. So I currently have about 1/4 tank of Valvetech ethanol free fuel in it. I store it in an underground mine with alot of humidity and must have less than 1/4 tank of fuel. I have a plastic tank. So in the past I have used E10 fuel with Star Tron. Should I use Star Tron with the ethanol free? Or anything else? I will fog it when winterizing but as far as the fuel in the tank anything special?
     
  2. Thornton69

    Thornton69 Active Member

    420
    Sep 15, 2014
    Northern BC
    1981 245 SDC
    1984 18' Valco sled
    5.7 260 Merc/ Bravo 2
    Evanrude 115/80 jet
    Guessing it won't be put away for long.. 4-5 mos? I would just top it off with the same ethanol free and not worry about the fuel. The tank doesn't breath much when full and the fuel wont even think of going bad in that window.
     
  3. Golfman25

    Golfman25 Well-Known Member

    604
    Sep 12, 2009
    IL
    281
    V8
    Why 1/4 tank? We usually put ours away full. Keeps the condensation down.
     
  4. stephens013

    stephens013 Active Member

    247
    Oct 8, 2009
    Ft Walton Beach, Fl
    2001 510 Sundancer
    1997 400DA Sundancer
    3196 Cat; 660 PHP
    3116 Cat; 340 PHP
    A week or two; heck, run it dry. That or as Golfman said, fill that puppy up. One or the other. That's the way we store airplanes dependign on impending storage times.
     
  5. Chris-380

    Chris-380 Active Member

    274
    Jan 20, 2019
    Pontoon Beach IL
    380 Sundancer 2000
    454 Horizon w/V drives
    I would bet at least 6 months, (oct,nov,dec,Jan,feb,march).

    I start here in central illinois early April, but that's dicey with the weather

    I would treat it with what's left in the tank, then fill with fresh fuel in the spring
     
    Thornton69 likes this.
  6. Zim

    Zim Active Member

    178
    Jan 16, 2018
    2012 Sea ray sundancer 310
    Twin merc
    I always top off. Keeps condensing at bay and i don't have to fight for pole position come spring time to fill up.
     
    Chris-380 likes this.
  7. sbw1

    sbw1 Well-Known Member

    Oct 10, 2006
    West Michigan
    This is listed in my signature
    This is listed in my signature
    IMG_4230.JPG We have always used Stabil and stored full with ethanol free fuel. Never a problem.
     
    Steve S likes this.
  8. boatman37

    boatman37 Well-Known Member

    Jun 6, 2015
    pittsburgh
    2006 Crownline 250CR. 5.7 Merc BIII
    Previous: 1986 Sea Ray 250 Sundancer. 260 Merc Alpha 1 Gen 1
    5.7 Merc BIII
    Not allowed to fill it up. Rules are 1/4 tank or less and no batteries. It's underground storage in an old mine. We have always kept our boats there but always used Star Tron and never had an issue. Just wasn't sure if I needed it with the ethanol free. Guess it wouldn't hurt to add some anyway?
     
  9. Creekwood

    Creekwood Well-Known Member GOLD Sponsor

    Apr 26, 2009
    Oakville and Georgian Bay, Ontario
    '97 330 Sundancer, Raymarine C80 suite with radar, Mercury 310 Hypalon w/8hp Yammie 2stk
    2X 454 carbs w/ vDrives
    I would add stabil at least. I don't use Star Tron. Modern gasolines break down fairly quickly so its stabilizer that you want. If you are worried about moisture accumulating because of the 1/4 fill requirement, nothing you add in the fall will prevent that. So you are probably better off waiting till spring to add anything that removes water.
     
  10. OllieC

    OllieC Active Member

    730
    Mar 11, 2013
    MinniSoCold
    Sara Belle
    2005 Weekender 215
    Mercruiser 5.0 mpi, Bravo III
    I fill mine with Non-Ethanol and 1oz per gallon of Sea Foam. Never had a problem and it gets well below zero for weeks and mine usually sits for 9 months. I imagine Startron and Stabil are just as good.

    In the Spring you may want to add Heat or some other isopropyl product to disburse any moisture just in case of condensation and maybe after your first tank you run through, dump out your fuel filter.

    Just winterized the Sara Belle Friday:(
     
  11. sbw1

    sbw1 Well-Known Member

    Oct 10, 2006
    West Michigan
    This is listed in my signature
    This is listed in my signature
    IMG_4230.JPG
    If you've not had issues in the past, keep doing what you are doing. Ethanol free gasoline line easily lasts through the winter in a controlled environment. I suspect your storage temps are very stable which is good. Any fuel treatment from a quality manufacturer will be added insurance. I suggested Stabil because I've used it for decades with no fuel issues. The other thing that is important is to buy fuel from a good source (clean tanks) that sells high volumes of ethanol free gas so you are buying fresh product. Our marinas receive several shipments of fuel per month supplied by a tank farm that is less than a mile from their locations. We know the fuel is fresh.
     
  12. boatman37

    boatman37 Well-Known Member

    Jun 6, 2015
    pittsburgh
    2006 Crownline 250CR. 5.7 Merc BIII
    Previous: 1986 Sea Ray 250 Sundancer. 260 Merc Alpha 1 Gen 1
    5.7 Merc BIII
    We have an ethanol free pump at a local station so not sure how much it gets used but last time I got it at the fuel dock so probably pretty fresh.
    I had not had issues until this boat but it sat outside for 3 years with about 20 gallons of old gas and no o-ring on the gas cap. I siphoned all the fuel and rebuilt the carb. Since then I have only put ethanol free in it because it was getting close to the end of season and I didn't wany ANY ethanol in it over the winter.

    Went out today and only have a little over 1/4 tank in it now. Thinking of maybe just siphoning it all out after I winterize/fog it and just using that fuel in my truck then in the spring see if there is any moisture in it to siphon then start fresh? Overkill? Or just add stabilizer to the 1/4 tank and forget it?

    The underground storage is a constant 55* but very humid. The have a climate controlled side that stays at 65* and low humidity. Been on the waiting list for that since before last winter. Might be able to get in there this winter but will be close. If not will get it next year for sure.

    Pretty sure I'm being too paranoid here but after having to be towed in this year I don't want to take any chances...lol
     

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