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Orange gasoline. #5337550 01/31/20 06:18 PM
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motor_oil_madman Online Content OP
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I changed out the fuel lines in my boat the other day and man did that fuel look old. It was orange coming out. Lol The boat has been sitting since around September and didn't start getting used until about a month ago. What's better run the old fuel out until it gets low then fill up with fresh stuff? I want to guess that it has around 40-50 gallons in it now. Gonna use the boat this weekend and burn through most of this fuel. I just don't know if I should fill it up before or after. Apparently the boat doesn't burn much. 12-15gph seems to be the average.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Orange gasoline. [Re: motor_oil_madman] #5337613 01/31/20 07:26 PM
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eljefino Offline
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Yes, run the old fuel. Maybe bring a jerry can. I assume the gas smells normal.

Re: Orange gasoline. [Re: motor_oil_madman] #5337650 01/31/20 08:06 PM
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Yeah it smells okay. Not too bad.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Orange gasoline. [Re: motor_oil_madman] #5337654 01/31/20 08:14 PM
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sloinker Offline
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Make sure you have a spare fuel filter or two. Orange sounds like rust to me.


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Re: Orange gasoline. [Re: motor_oil_madman] #5337655 01/31/20 08:14 PM
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I put 15 gallons in it around the middle of December, the tank holds 122 gallons total. what i'll do is run it on the old fuel this weekend then put 20 gallons or so of fresh stuff in when I get back, then run the engine on the hose to flush the engine out and that will also mix the new stuff into the fuel injectors.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Orange gasoline. [Re: motor_oil_madman] #5337657 01/31/20 08:15 PM
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I had the pickup tube out when changing the fuel lines, so it looks like the fuel gauge is accurate. It was showing 1/2 tank on the gauge and that's what it showed on the tube, about halfway up.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Orange gasoline. [Re: motor_oil_madman] #5337675 01/31/20 08:43 PM
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ondarvr Offline
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Some boat fuel lines leach out an orangish color into the fuel, it’s not uncommon.

Re: Orange gasoline. [Re: motor_oil_madman] #5337684 01/31/20 09:02 PM
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Oh really? I didn't know that.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Orange gasoline. [Re: motor_oil_madman] #5337858 02/01/20 02:24 AM
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Make sure to use fuel stabilizer. I prefer the Stabil in quart containers- Amazon had it for $10 recently.

Re: Orange gasoline. [Re: motor_oil_madman] #5337890 02/01/20 05:56 AM
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Olas Offline
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put an extra filter in the line and use it. if the filter plugs before the fuel is used then drain it and dump it.

Re: Orange gasoline. [Re: motor_oil_madman] #5337951 02/01/20 08:55 AM
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If the boat has external tanks I would dump it and start with new fuel. If its difficult to siphon it out I would run it but without confidence. These boats are complicated and it costs a fortune if you have to take them in for service. You didn't state if your motor is a inboard or outboard or the size of engine or anything. If it was all new gasoline in September I would think you should be ok to run it out. I don't know how much extra gas you can put in the tanks but I would be tempted to completely fill it with more gas to help stabilize it and also run a bottle or two of Seafood through it. I had an 89 IROC Z-28 that I parked over the winter one time and come spring I started it and drove about 10 miles and it died on me. Had it towed in and it cost me a grand for diagnosis and a new fuel injector or two. I make sure the gas is well stabilized after that episode and I think I had stabilizer it it as well.


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Re: Orange gasoline. [Re: motor_oil_madman] #5338000 02/01/20 10:01 AM
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Kira Offline
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Forgive me for flaming but since boats are "holes in the water you throw money into" how can anyone leave a load of fuel in the tank?

Now, with the likelihood of rust being in the fuel (and yes, I read the part about orange fuel lines leaching color into fuel) people are advising you run the fuel?

Also, adding Seafood to fuel is not a good idea....even if it is a boat!

Re: Orange gasoline. [Re: Kira] #5338014 02/01/20 10:17 AM
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Originally Posted by Kira
Forgive me for flaming but since boats are "holes in the water you throw money into" how can anyone leave a load of fuel in the tank?


I fill my boat tank to the very top full - every time I am done using it.

Leaving a boat with a partially filled tank is inviting condensation (esp since my tank is aluminum)


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Re: Orange gasoline. [Re: motor_oil_madman] #5338114 02/01/20 12:23 PM
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Aluminum fuel tanks don't rust, so I don't think that's it. What do you do with 50 gallons of gas besides burn it?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Orange gasoline. [Re: Linctex] #5338125 02/01/20 12:34 PM
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Originally Posted by Linctex
Originally Posted by Kira
Forgive me for flaming but since boats are "holes in the water you throw money into" how can anyone leave a load of fuel in the tank?


I fill my boat tank to the very top full - every time I am done using it.

Leaving a boat with a partially filled tank is inviting condensation (esp since my tank is aluminum)



I think the fuel will still get pretty old doing it that way. Plus there is the danger of it leaking out one day and having to figure out where to put it.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

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