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Author Topic:   Really Old Fuel
DBOutrage17 posted 09-21-2004 06:01 PM ET (US)   Profile for DBOutrage17   Send Email to DBOutrage17  
I didn't use my boat this season and I didn't use it last season. Before storing it, it was properly winterized and stabilzer added to the tank. It's an Outrage 17 with 50 some gallons on board. I went on Labor Day to run it and some sort of critter must have crawled up my Merc 150 and found a good home in the water pump. It's at the mechanic now but I haven't heard the final diagnosis. It was running OK on the old gas, except for the cooling.

My question is, should I be very concerned about the old gas? I intended to run it all labor Day weekend just to run out the old gas, replace it with new gas and winterize again for the winter. Or, could I have the mechanic that's fixing the cooling system, winterize what I have and try again next spring?

Thanks in advance.

skred posted 09-22-2004 10:11 AM ET (US)     Profile for skred  Send Email to skred     
If you're really concerned, run the gas into storage containers, and use it in your vehicles, 5 gallons at a time.
davej14 posted 09-22-2004 03:01 PM ET (US)     Profile for davej14  Send Email to davej14     
I would have the gas removed and replace with a full tank of fresh. Add stabilizer and run long enough to get the new gas through the system then winterize.
DBOutrage17 posted 09-23-2004 09:54 AM ET (US)     Profile for DBOutrage17  Send Email to DBOutrage17     
Thanks guys. New impeller fixed the cooling problem. The mechanic there said the boat ran fine with the gas it had. Hemmed & hawed and said I could probably winterize the gas again. so that's what I'll do & deal with it in the spring.
David Ratusnik posted 09-24-2004 06:49 PM ET (US)     Profile for David Ratusnik  Send Email to David Ratusnik     
So long as you DON'T premix-- think lawnmower.. .02 David
rtk posted 09-24-2004 08:59 PM ET (US)     Profile for rtk  Send Email to rtk     
There have been alot of questions similar to this asked regarding fuel that people do not want to run in their outboard motor.

I always find it odd that it is recommended that it be run in a car instead of the boat. A lawn mower, weed wacker I can see.

Why is it acceptable to run this fuel in your car instead of your boat?

I had a fuel problem this spring and found out it is very hard to dispose of gasoline.

If I had an old truck or car that was worth very little, I don't think I would worry too much. Some old car motors will burn just about anything with no problems. But I would think that some newer cars would be less tolerant to poor fuel than that.


jimh posted 09-26-2004 01:50 PM ET (US)     Profile for jimh  Send Email to jimh     
I wouldn't put stinky three-year-old gasoline in my 2005 car, either, but then again my most modern car is a 1995 with a plain-jane EFI fuel injector and lacking fancy exhaust gas monitoring, mass air flow sensors, and other computer-controlled enhancements to keep my stoichiometry in perfect balance.

Most modern cars can make some adjustments to their fuel as they run, so if you give them some marginal gasoline they might be able to still operate on it. On the other hand, you might need to re-jet your carburetors or re-set all your idle adjustments on your old two-stroke to get it to run.

Also, for most people their cars consume fuel faster than their boats. A 20-gallon tank on a boat might sit around for a month or two getting used, while in your car you can burn that much driving to work every day for some folks.

As a random data point, I just had my outboard boat underway for the first time in almost a year. It was running on gas that I pumped into the tank in October of 2003, and here it is almost October of 2004. The engines started and ran without any difficulty on this almost one-year-old gasoline. The boat ran as it always did, the engines idled smoothly, and they turned up to their normal wide-open-throttle speeds.

The gasoline in this case had been stabilized and treated with MDR Water Zorb (emulsifies and absorbs moisture in gasoline and MDR STOR-N-START gasoline stabilizer (prevents gas gumming).

The gasoline I treated was what I believe to have been pure gasoline (i.e., no ethanol content) which I bought from BP-Fuels. However, since then the Governor of the State of Michigan, Jennifer Grandholm (Democrat) has signed into law new regulations removing the labeling requirement from gasoline. I hope this autumn I can find some real gasoline for lay up, and not some alcohol-laden politically-tampered-with substitute.

jimh posted 09-26-2004 01:59 PM ET (US)     Profile for jimh  Send Email to jimh     
[Moved from another forum.]

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