"I have a 2006 Nissan 9.8 4 stroke, which has constantly been having problems with the 10%ethanol added gas. I have had to change the fuel line between the fuel pump and the carb, every spring for the past couple yrs. because of fuel leakage. It seems that in addition to attracting moisture, the ethanol swells and softens the line. Most recently the motor developed a problem where it would'nt idle. I disconnected the fuel line, where it usually leaks, and pumped some gas into a container,and found water droplets . Took the gas can back home, dumped it into my truck, and air dried the tank for a day. I returned to the boat, took the carb off and apart, visually checking all the jets and verified all accessable machined holes where open, put it back together, flushed some fuel thru using the primer bulb thru to the line I'd taken off just before the carb, pumped about 8 onces of gas into a container, and reconnected the fuel line. After priming the carb, the motor started right up, and would idle just fine. I used the motor on and off for the rest of that day. The next day, the problem returned. I spoke to my mechanic, and asked if it could be the fuel pump is weak, he suggested the carb could still be dirty, particularly behind the idle jet, which is located behind a factory installed brass plug. I had to agree, as that is the only location which I could not verify was clear, without removing the brass plug and idle screw. I've drilled out the plug, and removed the idle screw and now have verified the passage way is clear.
I will be installing the carb this labor day weekend, I'll reflush the lines, and report back.
Im still looking for a fuel line that can handle the ethanol. I read somewhere that the ethanol wont effect the fuel injection type fuel lines.
Can anyone confirm this? I suspect the ethanol,or the Startron additive I've been using to combat the moisture, is causing the fuel lines to deteriorate from the ID wall, and that debris collecting at or around the idle screw causing a fuel blockage.
Rick"
I will be installing the carb this labor day weekend, I'll reflush the lines, and report back.
Im still looking for a fuel line that can handle the ethanol. I read somewhere that the ethanol wont effect the fuel injection type fuel lines.
Can anyone confirm this? I suspect the ethanol,or the Startron additive I've been using to combat the moisture, is causing the fuel lines to deteriorate from the ID wall, and that debris collecting at or around the idle screw causing a fuel blockage.
Rick"