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"Woodchuck" wrote in message ...
Over here in Western Pennsylvania I use Sunoco 93 octane and haven't had any problems. I used the same fuel since 99 in my Mercury OB. 10%, don't think so as the max is no more than 5% from Sunoco. "Larry Weiss" wrote in message ... Both of my power boats have developed severe engine hesitation problems. They run okay at idle but sputter and stall when revved. My mechanics have complained that they are seeing this problem left and right - and are blaming it on the gasoline, which around here (Long Island, NY) now contains 10% ethanol. I know ethanol is not good for rubberized fuel lines, but did not know it caused running problems (unless the fuel lines are deteriorating and clogging). The gas in each boat was purchased at a different fuel dock. If my mechanics are correct, this is a serious regional (national?) problem. Anyone else experiencing difficulty? Any comments or suggestions? How can we get gasoline without ethanol in it? How is the marine industry addressing this? Larry Weiss "...Ever After!" "a little after..." Ok here some fact about alcohol addition to fuel: For a long time people have sometimes added a bit of alcohol to the gasoline in areas where water might get into the gas tank. The water does not mix with the gasoline and in cold climates can freeze in the gas line and in warmer climates prevent the engine from starting. Water is not a good fuel. Addition of the alcohol will cause formation of a ternarty mixture with the water and the gasoline and avoid the water from separating out. More recnetly in some states like california the EPA in order to reduce engine pollution the government has mandated the use of Oxygenated fuels. This is gasoline that has up to 10% alcohol added to make the gasoline burn cleaner. The 10% number comes from an agreement of automobile engine manufacturers who have agreed that up to 10 % the engine is not harmed and no special adjustment is required. With more than 10% alcohol the power of the engine is reduced and parts may suffer. In Brazil some cars use pure alcohol, these are special engines and people don't like them because they have no power ( I used to live there and had a car with an alcohol engine) For these reasons I don't think that poor running of an engine with a gasoline/10% alcohol is the problem. Water tends to cause starting problems but once the engine is running at high speed the water tends to disperse ( not dissolve ) and go through the engine with the gasoline. There may be several reasons for the stalling problem. Most likely the engines are starved of fuel when revved. Since it occurs on both engines it may be a simple as some blockage in the fuel line that allows some fuel to get through, enough for idle, but not enough for a high rev. S I would look for the problem in the fuel filters, fuel line, fuel pump etc |
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