Very old Gas in Tank
#1
Charter Member #232
Charter Member
Thread Starter
Very old Gas in Tank
I just got a boat that has not been registered for almost 10 years. The motors run fine on the gas but not sure if I still need to drain the gas or not. We have ethenol in the new fuel. There is about 1/4 of a tank.
__________________
Put your best foot forward!
Put your best foot forward!
#2
Crazy Energy
Platinum Member
iTrader: (4)
Join Date: Aug 2007
Location: Oklahoma God's country no one else wants it.
Posts: 4,334
Likes: 0
Received 1 Like
on
1 Post
Any airspace in a gas tank or storage container (plastic or metal), allows for the collection of mosture over time which will also damage gas. Even sealed tanks such as your car have a pressure relief valve than allows some airflow in the tank thus allowing a vaccum to not occur in the tank. This small airflow over a long period of time, or during times of high air mositure, can lead to damaging moisture collection most primarily if the tank was less than full.
Also stored gas can collect particulate matter, rust, dirt, etc., which can clog fuel lines, filters, and can harm both carburators or fuel injectors. Old gas also creates what is called "gumming" or "varnish" which will cause clogging and sticking within carburators or fuel injectors regardless of ignitability. If this problem occurs you might be faced with a carb rebuild and or injector servicing which can become costly.
If your stored gas is a year or more old it is best to and cost effective just empty it.
Last edited by Velocity Vector; 04-15-2009 at 11:18 PM.
#3
Registered
if it's been sitting for 10 years it's not gas any more, you need to get it out and run new fuel and change the filters..which you may have to do several times...
#5
Charter Member #232
Charter Member
Thread Starter
That was what I originally was thinking get it out and put it in yard trucks and so on. Then when I went up there the other day to warm it up before a very cold night I forgot the pony tank and it ran perfectly on the gas that was in there. I would of course not beat on it, just kind of run it out.
The real question IMO is what is going to happen with the old gas when it comes in contact with the new stuff. The motors are carb 420HP 454's by the way.
The real question IMO is what is going to happen with the old gas when it comes in contact with the new stuff. The motors are carb 420HP 454's by the way.
__________________
Put your best foot forward!
Put your best foot forward!
#7
VIP Member
VIP Member
I wouldn't run fuel if it was 2 years old let alone 10, get it out, and if your not real fond of your truck, put it in it. I have heard that old gas is a good weed killer.
larry
larry
#8
Crazy Energy
Platinum Member
iTrader: (4)
Join Date: Aug 2007
Location: Oklahoma God's country no one else wants it.
Posts: 4,334
Likes: 0
Received 1 Like
on
1 Post
That was what I originally was thinking get it out and put it in yard trucks and so on. Then when I went up there the other day to warm it up before a very cold night I forgot the pony tank and it ran perfectly on the gas that was in there. I would of course not beat on it, just kind of run it out.
The real question IMO is what is going to happen with the old gas when it comes in contact with the new stuff. The motors are carb 420HP 454's by the way.
The real question IMO is what is going to happen with the old gas when it comes in contact with the new stuff. The motors are carb 420HP 454's by the way.
#9
Charter Member #232
Charter Member
Thread Starter
Ok so I pull out the gas. There will be a little bit left in the bottom of the tank of course. What are the chances that the old gas will cause issues when I fill the tank back up with the new crap.
__________________
Put your best foot forward!
Put your best foot forward!
#10
VIP Member
iTrader: (1)
PUMP IT OUT !!! And then as Jeff said change filters several times to be safe.
__________________
Want your ECU tuned right?? Call Mark at Precision www.pmefi.com
Want your ECU tuned right?? Call Mark at Precision www.pmefi.com