I have a real head scratcher here. Hoping someone has some ideas. I have a Sovereign 7116 with a B&S 16 HP single cylinder engine. It's very hard starting. When I can get it running, it won't run very long. After quite some time tinkering with the carb settings, spark plug gap, and magnatron ignition coil gap, I was able to get it running. It seemed to run pretty good but, after about 3 or 4 minutes, it died and I couldn't get it started again.
Here's everything that's been done to the engine:
1. replaced original points/condenser with magnatron ignition (seems to be good spark, used business card to set gap)
2. new head gasket (while head was off i was able to see the valves move as they should)
3. had carb professionally rebuilt
After trying to start it with no success, I would pull the spark plug and it looked very dry and gas would be dripping out of the bottom of the carb.
This leads me to believe that gas is getting to the carb just fine, but not getting up into the cylinder.
But, when I did get it started, it ran great. When it died, it didnt sputter or anything, it was almost as if i turned the key off.
Sorry for the long post, but does anyone have any ideas?