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View Full Version : alt head scratcher



philgipson
03-13-2012, 09:17 PM
i been locked in mortal combat all morning with one of the two alt 125s i found in my neighbors barn.after carb rebuild,oil change and new plug it started but would not idle.i went back into the carb because it seemed lean.checked the hose to the fuel pump it was good.still no idle.getting real mad when out of desperation i pulled the vacuum hose to the fuel pump and put my finger over the hole,it idled perfect.turned out to be a air leak inside the fuel pump.