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Thread: Gull fuel in two-strokes?

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    Gull fuel in two-strokes?

    are there any issues around running ethanol based fuels such as gull in 2 stroke engines i believe they dont recommend using it in out boards and what are the problems?

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    Quote Originally Posted by fahnkahn View Post
    are there any issues around running ethanol based fuels such as gull in 2 stroke engines i believe they dont recommend using it in out boards and what are the problems?
    I have read its bad for 2 smokes but have not found out why. But it does not play nice with older cars. I wouldnt use it.

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    Its shit 10 chars

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    The ethanol does funny things to certain types of rubber, like causing it to swell. Which isn't too great for engine seals and fuel line. If you don't know that it's safe with whats fitted on your bike, I would steer clear.
    In saying that, most of the reported issues are in the US where they generally spec higher ethanol content than NZ. So the effects could be exaggerated.

    There's nothing wrong with it as a fuel source.
    we may just go where no ones been

  6. #6
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    It has less calorific value than petrol so you twist the throttle more to get the same output, so using more fuel and wiping out any cost saving you made. Stick with real petrol.

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    Quote Originally Posted by FLUB View Post
    It has less calorific value than petrol so you twist the throttle more to get the same output, so using more fuel and wiping out any cost saving you made. Stick with real petrol.
    True, relatively speaking though, a 10% ethanol blend is ~96% of the calorific value of pure gasoline.
    So if the Gull ethanol blend is more than 4% cheaper than the equivalent pure fuel, you're "better" off with the blend.

    Also, its only the Gull Force 10 fuel that is ethanol blended, their 91 is exactly the same as everyone else, but generally cheaper.
    we may just go where no ones been

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    Quote Originally Posted by noobi View Post
    The ethanol does funny things to certain types of rubber, like causing it to swell. Which isn't too great for engine seals and fuel line. If you don't know that it's safe with whats fitted on your bike, I would steer clear.
    In saying that, most of the reported issues are in the US where they generally spec higher ethanol content than NZ. So the effects could be exaggerated.

    There's nothing wrong with it as a fuel source.
    Gull fuel has 10% ethanol as with the USA ive lived here in the US for a year and 1/2 now and haven't seen anyone that sell fuel here that isnt 10% 15 % ethanol. most is 10 although with the newer cars more 15% is showing up Its been here for since around 1990.
    most peoples complaint is how it is Hygroscopic so as long as you dont leave your tank 1/2 full over long periods and any fuel in containers in as small a container as pos ( as small as you can get air gap ) the better
    [SIGPIC][/SIG

  9. #9
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    I run mine ( 350 twostroke) on E90, 90% Ethanol. It's a good fuel, especialy if it's an air cooled engine. Yes some plastics and rubbers are not compatible, I just soak the said parts in a jar of ethanol for a while to see what happens. Bosch injectors, pumps and regulators are all fine with ethanol but not the plastic filter. A castor blend oil is needed, mineral won't mix. I run a steel tank and aluminium fittings.
    I get my fuel by the 200L drum from what used to be APL ( dairy industry ethanol ).
    So, E10, 10%, don't worry about it, you may have to jet up slightly to get the best from it.

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