After priming, my mower would start, run for five seconds and quit. After checking fuel, air filter, oil I decided it must be a clogged fuel line. So I restarted using the primer and every four seconds or so I hit the primer to keep it running.
After about a minute of this the mower kept running without using the primer.
If this sounds like your problem and symptoms give it a try.
Joe P, August 2012
