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what's usually the cause of gas leaking into the cylinders on my briggs twin vanguard ? if i shut off the gas and run it till it dies , it fires right up the next day . thanks j.boy
John I had a Vanguard Briggs in a Argo Bigfoot a number of years back that had a similar issue it ran rich would not idle well and shut it down it would flood I replaced both the float and the needle and seat and all was well I did have a low pressure electric pump on it I had to eliminate the original pulse pump it was weak and pumping uphill as the tank lower than the carb but I see no other way gas can get into your cylinders other than the carb the original fuel pump is a pulse unit that is using crankcase pulse so if it had a bad diaphragm gas would end up in the oil not the cylinders it has to enter thru the carb is your fuel cell higher than the engine?
no , on a max 2 it's pretty much the same level . motor run's great , idles good etc. did,nt have this problem till maybe a year ago . i'll keep doing some research . thanks jb
The original needle and seat had a Vinton tipped needle that the new fuel ethanol didn't like it turned hard as a rock and would not hold back any pressure the replacement did not have the rubbery tip I guess to stand up to the good gas lol .
The new fuel with ethanol blend plays havoc on the fuel lines and carb needles, as well as just building up crud on the butterflies and throat of the carbs. I try to purchase non ethanol blended fuel when it is available. Its getting hard to find these days. I add Startron every time I fill a machine up and this works to abate the issue. I also run my machines at least an hour once a month and then add fresh fuel too. Since I've been doing this I haven't had as many issues.
thanks noel...i will try the startron and i can get non ethanol gas in town . could be the needles in the carb , so i'll get new ones ..thanks much jboy
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