I forgot to add that that I also have a Sthil HT 100 Pole Prunner and it starts fine just like the weedeaters and blowers.  Someone commented that Stihl makes a great saw and I agree (after I get it started).  Yes, I took the MS 170 into the Stihl dealer here in Kerrville and paid for them to do a complete tune-up.  They said I had bad gas and a bad spark plug.  They replaced the gas and plug.  About 2 or 3 weeks later I tried to use the saw (with the dealer's gas) and I still had a tough time starting.  Again, both of my saws run fine after starting and all of my other 2 cycle equipment start's and runs fine (using the same gas).  Heck, I've even started using Seafoam to see if that helps.  Nope!
I don't post very much on TBN - but - I read new posts almost daily and I really enjoy and respect you guys!  I've learned a lot too.  So, I felt like I could just share some frustrations!!!!!
Now - I feel better - again!