Small Engines (Lawn Mowers, etc.): Lawn-boy starts but wont restart, fuel flow, gas cap

Question
I have a 2 stroke Lawn-boy that will start initially but if I cut it off to empty the bag, it won't restart.  When I first start it I have to continue to lightly depress the primer bulb to keep it from stalling.  After it runs for 30 seconds or so it runs fine but once I turn it off then I'm done for the day.

Thanks,
Eric

Answer
Hi Eric,

You will need to determine if the problem is a lack of spark or a lack of fuel flow.  Right after it quits, remove the spark plug, reconnect the wire and lay it against the engine head.  Pull the engine over and watch for spark at the plug's electrode.

If good, then try to start it while squirting fuel or starting fluid into the carb intake.  If it starts and you can keep it running by adding fuel, then the carb most likely has dirt, debris or gummed fuel inside. (Which is what I suspect by you having to initially pump the primer repeatedly.)
First, check the gas cap to make sure it is venting and not causing a vacuum in the tank.  If that's okay, you will need to remove the carb, disassemble it, clean all the small internal openings and blow it out with compressed air.   Probe each and every hole with a small wire.   A carb rebuild kit wouldn't hurt either.  

Let me know how you make out.
Michael