What to do with last seasons outboard petrol ?

[Thistle]

Bert,
2yr old petrol did not have the ethanol content that current stuff has.
Enjoy it while it works, and until you run out, but don't expect new petrol to last like that.

ethanol separates from petrol with very little condensation, leaving the corrosive ethanol at the bottom. It will do your carburettor no good at all.

"Corrosive ethanol"??? On the liver, perhaps, but not on metal or the plastics used in fuel systems.

 

[chewi]

"Corrosive ethanol"??? On the liver, perhaps, but not on metal or the plastics used in fuel systems.

Try googling "ethanol corrosion". There are many references to corrosion inhibitors. It ate my (steel) Honda carburettor bowl when the fuel separated.

I learn it from a report that showed a 40ppm concentration of condensation was enought to separate the ethanol from the petrol, and that teh ethanol once separated will corrode the fuel system.

I am not accustomed to drinking it, so I speak for my liver ( wine does enough damage).

 

[bert49uk]

Try googling "ethanol corrosion". There are many references to corrosion inhibitors. It ate my (steel) Honda carburettor bowl when the fuel separated.

I learn it from a report that showed a 40ppm concentration of condensation was enought to separate the ethanol from the petrol, and that teh ethanol once separated will corrode the fuel system.

I am not accustomed to drinking it, so I speak for my liver ( wine does enough damage).

But if I let it run dry the carb bowl will be empty!
Just as a side note, on the last time I used outboard it mysteriously stopped, I pulled and pulled without success, when I got the engine home for strip down, guess what, yes out of fuel, so my two year fuel has now gone!
I must also agree with previous poster, I never mix up more fuel than I need for a tank full

 

[vyv_cox]

We row our dinghy as often as possible and consequently we use very little petrol. The stuff in the can was probably bought in the Ionian but it might even have been in Italy. So it is at least four years old and maybe seven. Still runs the outboard fine and starts easily enough. I just run the carburettor dry every time and close the tank vent as soon as we have finished with the engine.

 

[Thistle]

Try googling "ethanol corrosion". There are many references to corrosion inhibitors. It ate my (steel) Honda carburettor bowl when the fuel separated.

I learn it from a report that showed a 40ppm concentration of condensation was enought to separate the ethanol from the petrol, and that teh ethanol once separated will corrode the fuel system.

I am not accustomed to drinking it, so I speak for my liver ( wine does enough damage).

Ethanol tends to attract and retain water. It is this water which causes the corrosion, not the ethanol.

Unless you drink alcohol-free wine the you do drink ethanol: it is the alcohol in beers, wines and spirits.

 

[chewi]

Ethanol tends to attract and retain water. It is this water which causes the corrosion, not the ethanol.

Unless you drink alcohol-free wine the you do drink ethanol: it is the alcohol in beers, wines and spirits.

bugger!
I'm doomed then.