Kevinx
Newbie
.....
Simple stuff......remove 2 blade screws, hold throttle open, slide blade out, trim with grinder, hold throttle open, slide blade back in, loosely install screws with loc-tite, operat throttle several times(to let blade settle in properly) tighten screws, and let sit for an hour for the loc-tite to set.
With the blade closed. The screws can't fall in the engine. A lot less chance for vacuume leaks, or other problem.