Store with gas tanks full or empty?
10-04-2005 | 01:05 AM
#11
Charter Member # 55
Joined: Oct 2000
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From: Omaha/LOTO
Re: Store with gas tanks full or empty?
Originally Posted by 4mulafastech
I read a while back on another thread about the problem of gas coming out of the vent during storage. It is not the gasoline (liquid) that is expanding to any significant degree, but rather the vapor in the gas tank. Say you have a half tank of fuel and the trailer is cranked up with the boat is nose high. There is a lot of trapped vapor in the front of the tank that will expand on those warm days and literally pushes the gasoline out the vents. Putting the boat nose down so the vent taps into the vapor pocket allows it to "vent" (no pun intended) and you don't push liquid out. Makes sense to me... Just need to have the boat stored indoors so no other liquid (rain water) gets trapped into the nose down boat hull...
I actually fill them to about 100 gallons of the 120gallon capacity. I have to run at least 92 octane an dthats the highest octane I can get at the pump here. In the Spring, I add 10 gallons of 114 octane to bump it back up.
Last edited by Griff; 10-04-2005 at 01:08 AM.
10-04-2005 | 12:36 PM
#13
~~~~
Joined: Oct 2000
Posts: 1,451
Likes: 3
From: Western New York
Re: Store with gas tanks full or empty?
Originally Posted by GOODT
Rlw the problem with that is you will get condensation ie water
10-04-2005 | 01:47 PM
#14
Registered
Joined: Jul 2002
Posts: 533
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From: ann arbor mi
Re: Store with gas tanks full or empty?
Bob Teague had a question thrown at him like that(in Powerboat), he said with the quality of todays fuels he does not recommend leaving that much fuel in your tanks for that long of a time period.I think he said around 1/4 tank.
10-04-2005 | 02:22 PM
#15
Rough Seas Lie Ahead
Joined: Feb 2002
Posts: 2,465
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From: Virginia Beach, VA
Re: Store with gas tanks full or empty?
If your winter is long then you have a real concern. If they're relatively mild and somewhat short I don't think it's big concern for newer boats, but may be for ones that have been thru a few winter's. Stabilize whatever you've got in it, and get it running as early in the spring as possible with Dry-Gas additives and octane booster. Change your filter/s once or twice in the spring just for added measure.
10-05-2005 | 03:26 PM
#16
Charter Member #655
Joined: Dec 2000
Posts: 4,939
Likes: 1
From: Holland, Michigan
Re: Store with gas tanks full or empty?
1/2 full, I was told by my engine byuilder that gas only has a 6 month octane life so I top it off with 93 in the spring and take it easy through the first tank.
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10-05-2005 | 06:59 PM
#18
Gold Member
Joined: Oct 2000
Posts: 5,664
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From: Hollywood, MD, USA
Re: Store with gas tanks full or empty?
Originally Posted by 4mulafastech
I read a while back on another thread about the problem of gas coming out of the vent during storage. It is not the gasoline (liquid) that is expanding to any significant degree, but rather the vapor in the gas tank. Say you have a half tank of fuel and the trailer is cranked up with the boat is nose high. There is a lot of trapped vapor in the front of the tank that will expand on those warm days and literally pushes the gasoline out the vents. Putting the boat nose down so the vent taps into the vapor pocket allows it to "vent" (no pun intended) and you don't push liquid out. Makes sense to me... Just need to have the boat stored indoors so no other liquid (rain water) gets trapped into the nose down boat hull...
10-05-2005 | 08:55 PM
#19
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Joined: Dec 2000
Posts: 6,283
Likes: 1
From: EASTON MA.
Re: Store with gas tanks full or empty?
I had about 10 gals in my 100 gal tank for 2 years put in 45 gals of 93 sat, took it out ran good now back in the garage until spring cause I need some glass work over the winter 
10-05-2005 | 09:21 PM
#20
Platinum Member
Joined: Feb 2002
Posts: 191
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From: Michigan
Re: Store with gas tanks full or empty?
A local dealer said the latest thinking is less worry about condensation and more concern about fuel degradation. Therefore, stabilize whatever is left in the tank in the fall and fill with fresh fuel in the spring. I always used to fill the tank with stabilizer added in the fall. No more.
