I have a lawn mower (which I found on the curb) that runs OK for a few
minutes sometimes longer, but inevitably stalls, needs to be re-
primed, and re-started. (But will restart with no wait.) When it dies,
and I go to re-prime it, you can hear and feel that the primer bulb
sucking air at first, turning to a more reasonable fuel sucking sound/
feel at times (or after a few tries).
When I got it I replaced the spark plug, changed out the oil twice,
cleaned out the carb, replaced the fuel line, replaced the needle
valve and a badly deteriorated seat, and put the thing back together.
There seemed to have been some water in the engine, as the first
change of oil was very cloudy. It is a 4.5 hp Briggs and Stratton
12H800, in a Murray 204210X8B.
Not sure where the primer is pulling air from, why it is stalling, or
how to fix the issue (cheaply). Any suggestions would be greatly