For the folks that dont know why the G366 pro has a open cylinder.
One thing I do like on the pro version of this G366 is the better air filter set up. Hopefully the walbro carb on pro is better too.
If your research the cylinder that they copied and used on pro has been on the MS361 overseas since around 2013 OEM. Places like India, Malaysia etc. Still sold today OEM open port too over there.
2 cylinders listed for them overseas. But only the closed one was used in US.
Dealer that opens them up = I'll add some more. The closed and open are running neck in neck power wise.. but I'll say this, as someone who handles more FT cyls then, well more than 99.999 percent of the country, the pro cylinder is the nicest made ft cylinder period. 372xp pro being close second, but Def second.
one last thing, one of the most famous OEM Stihl saws was, well. Open port.. I do not favor it personally but a good saw is where you find it.
Some pics of the OEM and afm pro cylinders.
@newbury since you bought one. I dug deeper into the stihl ones the cylinder was copied from overseas. Instead of the one used in US.