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Dec 30th, 2023
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 Old ethanol gas
#13395050
01/07/20 12:19 AM
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Joined: Apr 2006
Posts: 29
skeeterguy
OP
Outdoorsman
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OP
Outdoorsman
Joined: Apr 2006
Posts: 29 |
How old is too old? Boat hasn't been used for a while and has about 20 gallons of treated ethanol gas that is about 6 months old.
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Re: Old ethanol gas
[Re: skeeterguy]
#13395092
01/07/20 12:59 AM
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Joined: Jan 2020
Posts: 627
machoblanco61
Pro Angler
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Pro Angler
Joined: Jan 2020
Posts: 627 |
How old is too old? Boat hasn't been used for a while and has about 20 gallons of treated ethanol gas that is about 6 months old. Should be fine
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Re: Old ethanol gas
[Re: skeeterguy]
#13395202
01/07/20 02:19 AM
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Joined: Jan 2004
Posts: 2,439
rb7764
Extreme Angler
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Extreme Angler
Joined: Jan 2004
Posts: 2,439 |
If treated with Stabil or similar, it will be fine.
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Re: Old ethanol gas
[Re: skeeterguy]
#13395383
01/07/20 12:21 PM
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Joined: Jul 2012
Posts: 12,214
Cast
TFF Guru
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TFF Guru
Joined: Jul 2012
Posts: 12,214 |
Smell it. When it goes bad it begins to smell like whiskey a little.
Cast ![[Linked Image]](http://winsounds.com/wp-content/uploads/2013/11/Longhorn-Logo.png) I have a short attention spa
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Re: Old ethanol gas
[Re: skeeterguy]
#13395479
01/07/20 02:09 PM
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Joined: Aug 2006
Posts: 7,182
steve@S2Marine
TFF Celebrity
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TFF Celebrity
Joined: Aug 2006
Posts: 7,182 |
i'd get out as much as possible and burn in your vehicle and start the year off with fresh fuel in the boat
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Re: Old ethanol gas
[Re: skeeterguy]
#13395543
01/07/20 03:02 PM
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Joined: Jul 2010
Posts: 1,349
boatman025
Extreme Angler
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Extreme Angler
Joined: Jul 2010
Posts: 1,349 |
I would drain the tank shelf life for gas is 6-8 weeks. It want burn as good as fresh and I wouldn't try to put new gas on top of old. That's like you have a half gallon of milk that bad and putting a half gallon of fresh milk on top my question is would you drink it.
Hughes Marine
3855 Osage Lane
Wylie ,Texas
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Re: Old ethanol gas
[Re: boatman025]
#13395562
01/07/20 03:28 PM
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Joined: Feb 2006
Posts: 3,769
bronco71
TFF Team Angler
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TFF Team Angler
Joined: Feb 2006
Posts: 3,769 |
I would drain the tank shelf life for gas is 6-8 weeks. It want burn as good as fresh and I wouldn't try to put new gas on top of old. That's like you have a half gallon of milk that bad and putting a half gallon of fresh milk on top my question is would you drink it. Exactly, I would drain it and mix it with fresh gas in my truck.....as long as it isn't premix!
1987 Nitro MX185/Mercury Black Max 150
1999 Triton TX21/225 Mercury Optimax
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Re: Old ethanol gas
[Re: skeeterguy]
#13395732
01/07/20 06:16 PM
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Joined: Jul 2010
Posts: 1,349
boatman025
Extreme Angler
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Extreme Angler
Joined: Jul 2010
Posts: 1,349 |
Hughes Marine
3855 Osage Lane
Wylie ,Texas
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Re: Old ethanol gas
[Re: Cast]
#13395733
01/07/20 06:16 PM
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Joined: Apr 2004
Posts: 14,067
Stump jumper
TFF Guru
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TFF Guru
Joined: Apr 2004
Posts: 14,067 |
Smell it. When it goes bad it begins to smell like whiskey a little. That is E85. Problem I have with my current boat is a 95 gallon tank. I run it as low as I dare then start carrying portable containers. I have run a couple of trips last year and this year with the gauge sitting on E. I would really like to know how much is left when I get to E. I run ethanol free in it.
2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
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Re: Old ethanol gas
[Re: skeeterguy]
#13396673
01/08/20 01:25 PM
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Joined: Jun 2013
Posts: 8
flyingbutcher
Green Horn
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Green Horn
Joined: Jun 2013
Posts: 8 |
Just put in as much new fuel as you can along with a can of sea foam. You will be fine.
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Re: Old ethanol gas
[Re: boatman025]
#13396691
01/08/20 01:48 PM
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Joined: Feb 2006
Posts: 5,085
BillS2006
TFF Celebrity
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TFF Celebrity
Joined: Feb 2006
Posts: 5,085 |
I would drain the tank shelf life for gas is 6-8 weeks. It want burn as good as fresh and I wouldn't try to put new gas on top of old. That's like you have a half gallon of milk that bad and putting a half gallon of fresh milk on top my question is would you drink it. I ran my boat yesterday for the first time in over 6 months. It started and ran just fine on the "old" gas.
Transgenders: God made them, the devil changed their minds.
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Re: Old ethanol gas
[Re: skeeterguy]
#13396729
01/08/20 02:13 PM
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Joined: Aug 2007
Posts: 436
Samarai
Angler
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Angler
Joined: Aug 2007
Posts: 436 |
my boat once sat for over a year as things were happening in life. when it came time to run the boat i just filled it up with new gas. Had about 3/4 of a tank of gas in there. Started it up and just ran it.
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Re: Old ethanol gas
[Re: skeeterguy]
#13397479
01/09/20 01:27 AM
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Joined: Feb 2006
Posts: 909
Alumacraft 14
Pro Angler
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Pro Angler
Joined: Feb 2006
Posts: 909 |
Depends on how it is stored. Full tank, treated, indoor storage you will suffer some octane loss and that is about all. If you are worried burn 5 or more gallons and add fresh gas to it. May be some moisture but nothing a fuel line separator can't handle. EFI can handle this situation better then a Carb motor. So it all depends on the factors. I would say you are good to go.
Last edited by Alumacraft 14; 01/09/20 01:30 AM.
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