Chainsaw Repair

Hi to all and thanks in advance.  I'm new to the site. 

I'm working on an 066.   I bought it used and it ran terribly.  After examination, I noticed that the clutch side of the crank was very wobbly.  I tore it down to the crankcase and found around 2mm of side play on the crank. 

I ordered new bearings, a gasket kit and carb kit. 

Now for the many questions. 

Im separating the crankcase with a gear puller and it seems to be working, but I'm a bit nervous that he force may crack the case where I'm pulling from. 

How is the head gasket removed?  Does the piston need to come off?

The cylinder, piston and crank/pistion bearings all look great.  The cylinder is shiny, has no scores, but also zero cross hatching.  Do I leave it be, or try to scuff it with some fine emery or a brake cylinder hone?  How should the rings be offset/rotated for assembly?

What do I coat the new crankcase gasket with for assembly?

My flywheel is metal and has a keyway marked "X" and "P". Which is the proper slot to install on the keyway?

I know it's alot of questions and I thank you all for any help you give me. 

Al

If I knew which slot, I wouldn't be asking. 

How do I determine the ignition type?  It has no points, just an aluminum flywheel and a magneto assembly. 

The piston has pins that will orient the ring gaps. No need to prep the cylinder bore. If the case half mating surfaces are clean no coating is needed on the gaskets. Do you have an 066 service manual? If not then a PDF copy could be e-mailed to you.

The easiest method I've  found to split the cases is to heat the bearing pockets with a heat gun .Heat ,pry a bit ,heat .Don't get in a hurry ,you'll be allright .

To reassemble there's several methods .You can install the bearings on the crank then put the whole mess in the freezer for a couple hours then heat the pocket on one side of the case,install ,then do the other side .

Another as outlined in a few Stihl manuals is to install the bearings in the case halfs first then heat the inner race using a soldering iron .Of course freeze the crank as before .If the bearings have a plastic cage I'd be a little leary using this method .

These are just two ways I've used but I'm sure there's other methods depending on what tools you have .

In my opinion a little well placed heat in conjuction with a frozen part is less stressfull to the assembley than forcing the press fit bearing with some type of clamp .

Thanks for the help.  It's back together, has spark but wont run.  I believe i picked the wrong flywheel keyway and will be adjusting that tonight.   

My saw came wth no sprocket retaining washer or clip.  Where can I purchase these?  I also need the stock outer dog ear. 

Thanks.