Finally got off my butt and adjusted the idle RPM and running RPM on the Dr Brush mower's new engine, was a huge PIA for me!!!!!
I'll take an automotive carburetor any day of the week over one of these things!!! The way the governor works, basically fighting against/adjusting two connected springs. And of course, the original engines carburetor had a manual choke, the new engine does not, so had to modify the original throttle cable. And, the exhaust runs directly underneath the governor plate, so adjust, reassemble, start engine, burn yourself taking it back off to adjust some more, repeat about 40 times!!!!
I salute anyone who does this for a living, it sucks, especially the first time. I have the engine idle speed at around 1650, run RPM right below the 3600 recommendation, I'm at around 3550. This is using the tachometer that is built into the hour meter. I ran it for 2 hours, holds RPM and does not bog down any, works great, I'm calling this chore finished!!!!