I have a Husqvarna 445 chain saw and it does not get enough oil to the bar and chain. I have to stop saw after about 10 minutes of cutting because it freezes the chain so I remove bar and chain clean out the oil ports put back together nd it works for about another 10 to 15 minutes and it freezes again. Help

Your Manual nor IPL mention an oiler adjustment..
445 IPL (may not be your saw)
Is this the original bar? A longer bar requires more oil and your saw is not equipped to supply it.
http://weborder.husqvarna.com/order_static/doc/USA/2007/I07000/I0701086.pdf
Detail B (Clutch/Drum/Oiler)
We are seeing many of these does not oil/oils to much problems with these no adjustment models. I recommend you contact Husqvarna, there may be an unannounced recall/repair. If they aren't willing to help you consider contacting your Atourney General and the BBB.
Contact Husqvarna here:
http://www.husqvarna.com/us/homeowner/support/customer-support/
It has an outboard clutch, the oil pump is behind it. If you attempt a repair this will be helpful.
R² Drive Link Outboard Clutch by Drivelink.blogspot.com
http://www.youtube.com/watch?v=cdqkIuVNUQc

1. Check the IPL for your saw to see if any special tools are needed.
2. There are metal piston stops available, when square (almost never) with the piston top these work well, if not square they have been known to punch through the piston. I suggest a length of starter cord or nylon rope be used instead of the piston stop (retain 6" ± so you can remove it). Make sure the piston is near the top of the cylinder before feeding the cord or it can fall through the exhaust port and damage the piston as it rises.
3. Everyone I’ve ever removed had a left handed thread (tighten it to loosen it).
   Let us know how it worked for you.