Best way to handle dirty fuel

dirtyoldman

Petty Officer 1st Class
Joined
Apr 30, 2007
Messages
359
I've been through two strainer filters on my carb inlet so far this year, and only burned about 30 gallons of fuel. They have been plugged with junk. My spin on filter was changed early this season. I have about 35-40 gallons currently in the tank.

1) Why is this getting past my spin on filter?
2) Should I replace the spin on filter again?
3) Should I try to burn off the fuel I have in the tank first? I don't particularly want to waste it.
4) What's the best way to try to get the junk out of the tank if it's empty?
 

Pokertrampp

Petty Officer 1st Class
Joined
Sep 17, 2009
Messages
279
Re: Best way to handle dirty fuel

Are you sure its coming from the tank and not from the fuel(s) line deteriorating from ethanol?
 

dirtyoldman

Petty Officer 1st Class
Joined
Apr 30, 2007
Messages
359
Re: Best way to handle dirty fuel

Are you sure its coming from the tank and not from the fuel(s) line deteriorating from ethanol?

No, I am not. The fuel supply line is easy to replace. I suppose I could just do it. The one from the filler will be expensive and hard to do. I'd rather not do that one unless I know that's the problem.
 

HT32BSX115

Supreme Mariner
Joined
Dec 8, 2005
Messages
10,083
Re: Best way to handle dirty fuel

No, I am not. The fuel supply line is easy to replace. I suppose I could just do it. The one from the filler will be expensive and hard to do. I'd rather not do that one unless I know that's the problem.

The one from the tank must be a USCG Approved "A1" Or "A2" type fuel line.

Replacing it is probably a pretty good idea anyway. If it's not more than about 10-15 years old it's probably going to be unaffected by any of the mixtures of gasoline available today.

Most fuel lines from engine mounted fuel pumps to the carb are stainless steel. (is yours?)


A stainless steel fuel line (of course!) is going to be unaffected by anything you pump through it.


If you have not drained your fuel tank and looked inside, you may have water and/or other debris inside. (Is yours a fiberglass fuel tank? If so, then you may have a problem leaving E10 in it for long periods of time.)


The easiest way to drain the tank would be to put the bow up a little, remove the fuel tank sender and use a long piece of 1/2-3/4" clear vinyl hose to siphon all the fuel out.

If you have someone else handle the other end of the hose (with enough containers to handle the total amount of fuel) you can "vacuum" the tank of all the debris and water using the siphon. (DON'T USE A SHOP VAC :eek::eek: ......It's been tried.......BOOM!!) Do it outside with a fire extinguisher handy!

With the sender out and the bow up, you can use a flashlight to see any water and debris that runs towards the back of the tank. Since the sender hole is usually towards the back of the tank you should see be able to anything that's in there.....

You either had a LOT of contamination in your tank or your fuel supplier is pumping it into your tank every time you fill up. (or the last time you filled up)


You also may have had debris in the fuel fill hose from the deck-fill TO the tank. Then, the last time you filled up you may have rinsed the debris directly into the tank.

Regards,


Rick
 

JustJason

Vice Admiral
Joined
Aug 27, 2007
Messages
5,321
Re: Best way to handle dirty fuel

Is your fuel tank steel, aluminum, plastic or fiberglass?
 

HT32BSX115

Supreme Mariner
Joined
Dec 8, 2005
Messages
10,083
Re: Best way to handle dirty fuel

Yeah, I didn't add above that if you have a fiberglass tank (or it's integral to the boat structure), That's another problem altogether. Todays politically mandated ethanol laced fuel WILL in some cases melt or soften some resins earlier used in fiberglass boats. There's a LOT of info written on this.


My fix would be to remove/replace any fiberglass tank. That might be easier said than done.....




Regards,




Rick
 

dirtyoldman

Petty Officer 1st Class
Joined
Apr 30, 2007
Messages
359
Re: Best way to handle dirty fuel

Yeah, I didn't add above that if you have a fiberglass tank (or it's integral to the boat structure), That's another problem altogether. Todays politically mandated ethanol laced fuel WILL in some cases melt or soften some resins earlier used in fiberglass boats. There's a LOT of info written on this.


My fix would be to remove/replace any fiberglass tank. That might be easier said than done.....




Regards,




Rick


I think it's aluminum, but not sure. I think I'll change the filter one more time and try to run it close to empty this weekend and then see where I end up after that. I don't want to waste the fuel in there.
 

JustJason

Vice Admiral
Joined
Aug 27, 2007
Messages
5,321
Re: Best way to handle dirty fuel

put a strong magnet to it and see what happens.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,148
Re: Best way to handle dirty fuel

I think I'll change the filter one more time

Ayuh,... And dump it into a container to SEE what's in it...
 

NHGuy

Captain
Joined
May 21, 2009
Messages
3,631
Re: Best way to handle dirty fuel

Wicked smaht ideah from Wicked Good!
 
Top