Originally Posted By: mva
I forgot to ask if your motor has always had trouble with long grass. If so my advice above applies.
If the power has dropped from new, I would remove the carb, disassemble and clean it with carb cleaner and compressed air. It is not that difficult and there are lots of very small passages that can plug.
The mower is new...first season. Since day one Ive ran Shell or Chevron 87 with fuel Stabl. Next spring im changing the blade, oil and spark plug. Im giving the E3 spark plug a try so well see.