Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

I have an early HS621. I JUST had it serviced, new fuel lines, tune, paddles, etc. It always starts right up with the first pull and full choke. The problems starts AFTER it warms up. I can use it for about 10 mins then it just stutters and cuts out, regardless of where the choke is. It will start right back up on full choke, then die again in about 15-30 seconds. If I leave it for a few hours (engine cools?) i can then run it again for another 10 mins before it starts acting up again. HELP!!! thanks, xjmllc first post.

Try loosening the fuel cap. You could have a blocked vent creating a vacuum and starving it for fuel.

could have a vapour lock (fuel cap not venting proberely)... I would also check the needle and seat for sticking or improper install.. any backfiring??.. if yes? getting the valve clearances checked wouldn't hurt..

first thing I would do is start it up.. loosen gas cap and see if it stalls.. if it doesn't then replace fuel cap..

Since it happened RIGHT after being serviced I'd look at the carb for something not reinstalled correctly. I once installed the carb bowl facing the wrong way and it didn't allow enough room for the float to move. Probably something simple...