Surely you guys have some kind of carb jet upgrade to send to Bob? Along with some engineer who wants to visit Arizona and install them?
Apparently the topic of low lead and unleaded and what geneal aviation aircraft can or will use for fuel, without falling out of the sky, is a real hotbed. From what I've heard the EPA wants no lead, and everyone else says that's a nice concept, but there's no way to keep those engines happy without lead.
The jet is pretty easy to replace in most smaller outboards. I could post the procedure for the BF5 if needed.
A little off topic, but a good read here (scroll down half-way) about progress toward unleaded aviation fuels:
en.wikipedia.org/wiki/Avgas <--I don't have a post-count high enough to make this an active link :-|
Caveat: I work for Honda, but the preceding is my opinion alone.