How many months of sitting before I need to pump out the old fuel in my tank? I have half a tank that has been sitting for just over two months. Burn it off or pump it out?
Did you use Marine Sta-bil? If so, they claim it will keep for up to 12 months. Again, that is what they claim. I use it and have gone 6 - 8 weeks in between uses this winter without an issue (that I am aware).
“The problem with socialism is that eventually you run out of other peoples money”
GW 205
F200 Yam
pump the fuel out, and run it in your truck
your truck isnt going care if the octane is low
even if the fuel hasnt actually gone bad, it will definately have lost octane.
if you pump it into your truck and use it, you havent lost anything, and no risk of detonation issues from low octane fuel, blowing up a motor
I’m now at www.teamcharlestonmarine.com
quote:
Originally posted by chris Vpump the fuel out, and run it in your truck
your truck isnt going care if the octane is low
even if the fuel hasnt actually gone bad, it will definately have lost octane.
if you pump it into your truck and use it, you havent lost anything, and no risk of detonation issues from low octane fuel, blowing up a motorI’m now at www.teamcharlestonmarine.com
what kind of pump would you suggest
thanks
What grade gas should you run in a outboard. I’ve heard 87 and 93 and both arguments sounded lagit.
i have a half a tank and my boat has not been run in about 2 months as well… i plan to top it off with fresh gas and run it… it may not be the “ideal” thing, but i’m definitely not going to go through the hassle of draining my tank and refilling it. if it were sitting for more than 6 months i would seriously consider draining it, but just after 2 months, i would not worry about it… just depends on how cautious you want to be.
that said… i could be getting my carbs rebuilt as a result… who knows
Chris V
How long does Startron treated fuel last?
floater
what motor do you have?
if you have a DFI motor, DO NOT RUN OLD FUEL
lucky
startron treated fuel helps, but it still begins to lose octane quickly.
you have 4 strokes, so its not as big an issue
I really dont know how long it will last
I’m now at www.teamcharlestonmarine.com
chris v, it’s just a 90 horse yammie, carbed, 2 stroke
quote:
Originally posted by chris Vfloater
what motor do you have?
if you have a DFI motor, DO NOT RUN OLD FUELlucky
startron treated fuel helps, but it still begins to lose octane quickly.
you have 4 strokes, so its not as big an issue
I really dont know how long it will lastI’m now at www.teamcharlestonmarine.com
I am confused…you are saying not to use old fuel for what reason…low octane…what does that wear on…I thought you were trying to prevent injectors from clogging…
what does fuel losing octane do to a motor and how are dfi 2 strokes different than dfi 4 strokes in that matter
I had about 30 gallons in an aux tank I hadn’t used in over 6mo. - i used a hand pump. I connected it directly to the fuel line (disconnecting it from the motor) using a fuel splice connection and just pumped out 5-8 gallons weekly and mixed it in my truck until I used all of it up.
This is the pump: http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200008074_200008074
It was only 10 bucks on sale at harbor freight and worked ok. There were a lot of mixed reviews on this pump - I didn’t have any leaks or any problems with priming. I wouldn’t use it for more than 20gal @ a time. 5 gallons would take me about 10 minutes of my time - then I would just mix it with fresh gas in the car - no problems…knock on would.
detonation caused from low octane is very bad for a motor
the DFI motors are much less forgiving when it comes to detonation.
when octane gets low, the fuel is much more unstable.
think of old dynamite in an old western.
it still blows up, just not when you want it to.
low octane fuel is the same way.
it will explode in combustion chamber, before the piston reaches the top of its stroke.
that means the moving parts are still moving up, and the explosion takes place, and can force them to go down before they are ready, which makes metal parts inside the engine break, and holes get poked in the side of your engine.
I wouldnt run old fuel in any outboard. 2 stroke is bad, and DFI 2 stroke is worse.
you truck doesnt turn the RPMs your boat does, so detonation is nearly as big an issue
I’m now at www.teamcharlestonmarine.com
Chris, Marine Sta-Bil claims to keep fuel “fresh” for up to 12 months. Any thoughts on what this means?
“The problem with socialism is that eventually you run out of other peoples money”
GW 205
F200 Yam
also…whats better…stabil marine or startron???
I treated my fuel with Marine Stabil and quicklean. Can I still pump it and run it in my car? Sorry to hijack the thread, but great question.
The best way to a fisherman’s heart is through his fly.
quote:
Originally posted by Mullet ManI had about 30 gallons in an aux tank I hadn’t used in over 6mo. - i used a hand pump. I connected it directly to the fuel line (disconnecting it from the motor) using a fuel splice connection and just pumped out 5-8 gallons weekly and mixed it in my truck until I used all of it up.
This is the pump: http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200008074_200008074
It was only 10 bucks on sale at harbor freight and worked ok. There were a lot of mixed reviews on this pump - I didn’t have any leaks or any problems with priming. I wouldn’t use it for more than 20gal @ a time. 5 gallons would take me about 10 minutes of my time - then I would just mix it with fresh gas in the car - no problems…knock on would.
I used this pump and it worked great…a little leaky but got the job done.
The other alternative when I was going to do this was to go to Autozone and buy a cheap fuel pump and just hook it up to a 12v. But the idea of a battery and gas fumes didn’t seem to appealing to me. And the cheapest pump they had at Autozone was for a Chevette and cost 60 bones.
If I understand this correctly Startron or Stabile is used to prevent phase seperation. If the fear is loss of octane and not phase seperation, can you not just add some premium high octane fuel to “freshen up” the old fuel?
I add 93 oct when I fill up as my fuel is always sitting for weeks to a couple months. I don’t know the scientific merit but for a few bucks more it sounds good. Perhaps an expert will chip in.