fuel treatment for ethanol free gas
 

about 6 months ago i switched to ethanol free gas and subsequently stopped using my trusty startron ethanol treatment. I have probably topped off (15-20 gal/per) the boat 8-12 times in those six months. I havent been out as much as I want to lately so I am wondering if theres anything i should be doing to treat the gas sitting there. boat was used last probably 30 days ago, so its not worth winterizing, and im heading out this weekend. i know i can walk into west marine and get this answer but i trust you guys much more than them. any help is appreciated. if it matters im running a 2 stroke johnson. thanks

Re: fuel treatment for ethanol free gas
 

I would go back to using Startron. There is no way that they can deliver 100% Ethanol free fuel.

Re: fuel treatment for ethanol free gas
 

What year & hp?

Re: fuel treatment for ethanol free gas
 

I look at fuel treatment as pretty cheap insurance against major engine problems in these days of unknown fuel quality. "Ethanol-free" gas is getting harder to find all the time, although I've seen it advertized at some marina's. You can't even be sure the 10% ethanol fuel is really 10% these days unless you test it yourself! I have always used Stabil fuel preservative for the last 10-15 years, even before ethanol came along, to guard against plugged jets and loss of octane over time. If you plug an idle jet, it'll just idle poorly, but if you plug a main jet, it can be fatal if you're running premix because that lean cylinder is also being starved for oil! The only time I don't use it is if I'm on a long cruise where I'll burn up a whole tank in a day or two. They count on the ethanol to add about 3 points more octane to the fuel. You can have serious problems if you get enough water in the tank through condensation to combine with all the ethanol (called phase separation), because if you started with 87 octane gas, you'll end up with 84 octane if water takes out all the ethanol! :o The resulting detonation can wreck an engine pretty quick! There are no valves to rattle in a 2-stroke, so the first obvious sign of detonation can be when it breaks a ring or blows a hole in a piston! If you want to be safe, buy 92-93 octane gas so that you still have enough octane even if you get some phase separation.

Re: fuel treatment for ethanol free gas
 

Old post about this issue

http://www.classicseacraft.com/forum...=&fpart=1&vc=1

FellowShip

………………………….

Just for the Grins :D

Official Antique Classic SeaCraft Owner

Re: fuel treatment for ethanol free gas
 

its an '06 150. bushwhacker, do you use stabil in addition to something for ethanol, or by itself? i used it at one point until overwhekming majority convinced me to switch to startron.

Re: fuel treatment for ethanol free gas
 

I use the marine formula Stabil, which I like better than Startron.

Re: fuel treatment for ethanol free gas
 

I also use marine formula Stabil. My local Walmart stocks it in the quart size.

Re: fuel treatment for ethanol free gas
 

Seafoam for me , covers all aspects of fuel, carbon , winterization issues

Re: fuel treatment for ethanol free gas
 

Hey guy's, the real problem is humidity + ethanal= trouble.We have been sold a bill of crap. Ethanal contains less BTU's than gasoline. It take 1.5 times the units of ethanal, than gasoline to do the same work. So if for no other reason fuel mileage goes Down. Ask any one who races with alcohol fuel and they will tell you " the hardest thing to do is store the fuel with out water intrusion" this is in a steel sealed drum . Inboard mounted tanks normaly have a 5/8" fuel vent,and where are you going to find moisture when BOATING . Until the powers to be get straightened out we are stuck with the problem. This is shared with all none late model Gasoline powered machines, except Automobiles,& Light Trucks. The have well controled venting systems. George Ps. Octane is only a measure of burn rate, High octane = slow burn, Low Octane = faster burn. Extra Oil Lower Octane.