if it starts and runs for just a few seconds then dies it is generally a carburetor issue. clean or replace the carb and that should solve your issue.
The fuel filter is clogged and restricting the flow of fuel to the carburetor.
the bolt in bottom center of carburetor bowl has holes in it that are stopped up like mine was.
The fuel filter is probably clogged and restricting the fuel flow. If the engine blows black smoke before it cuts out, then the engine is flooding - look for a dirty air filter or a fouled spark plug.
The kill-switdh wire is disconnected. loose. or broken. The kill-switch wire starts from the OFF position of the ignition switch and meets another wire that leads to GOUND to stop the engine.
Three things you want to look for: dirty/clogged ful filter; faulty spark plug; carburetor setting.
it is losing its prime... i have the same problem right now and i have cleaned the carburetor, changed the gas and spark plug and changed the air filter. The only thing that i can think of is that there is something wrong with the priming bulb or the gas cap is hindering the air flow... still trying to repair....
Put gas in the carb. then try and start it if it starts you should check your fule lines and carb. If it does not start.Try a compresion test.If it reads 0 you may have a bent valve or rings might be bad.
If the engine turns over freely with the sark plug out, then check for loose,rusty,or corroded connections from the headlights back too the battery.Even the ground wires throughout. recheck with a fully charged battery (12.6 v)
If you are saying the engine starts and runs for 15 seconds and dies and then starts again for another 15 seconds and dies . . . the distributor seems to be doing its job. You might want to check if there is a fuel restriction somewhere (filter or pump).
won't stay running starts and goes then stalls Sounds like might be a float ,fuel filter or maybe just needs a good cleaning. Hope this helps.