My BX24 rpm gauge is digital and thus no symbol on gauge. I've read a variety of answers from 2550 engine rpm to wot. I know it's important to know specifically for a generator. In my case I'm only using it thus far with a BX52 Wallenstein chipper and I have been running it at 2550 but have bumped it up a couple of times but never to wot. Seems this should be in the manual but not in mine. Anyone with a BX series have the answer? Thanks in advance.