Todays airleaks....when it comes to bottom part I'll take one 2xx serie saw anyday, I'm not a huge fan of them 3xx serie saws for several reasons...
353 year 06, leaky plastic clamp wall, more then enough so I couldn't find other leaks.
She got a new partition wall + metal clamp, new p&v test showed that she needed a new impulse hose as well, the last p&v test showed a minor leak, after awhile I found it, those two bolts was loose.....
Next one, 345 year 99, low hour saw, massive airleak around the cyl base, pulled the jug, new part wall + metal clamp, oem sealant was used, almost perfect except that there is an leaky seal also..
I'm just gone trow the whole 3xx powerheads in a bucket water in the future (just as I do with them 5xx serie saws), find all them leaks asap!!