Easy plug cap removal.

Please forgive me if this has already been mentioned somewhere.

My plug cap is really hard to remove at times. I cranked up my compressor, disconnected the coil lead, and using the airblast nozzle shot a quick blurt into the head breather hole. Cap popped right out.

Good idea to cover the area with folded rag to stop any violence in case of excessive air. You don't want to send the unit into orbit.

No luck with blowing air in the hole on the right side of the cylinder. No luck in prying with a wrench -- getting nervous the plastic would break.

My 2 cents... : slide a small but strong string underneath the rubber seal (prying it gently with a screwdriver). When you have it all the way around, cross the two ends of the string... pull.
Cotton string works well as there is no way it will cut through the rubber seal.