Stihl 064av rebuild

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Mike Haverstock

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Hello all,

I’m pretty new here, but plan on being here a while. I’ve been reading and learning from you folks. I appreciate all the great knowledge here. I’m starting my first complete rebuild. I picked up an 064 off Craigslist for almost nothing. It didn’t run and seemed way low on compression but was complete so way worth the price of admission. Here’s how it looked when I brought it home.
 

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90psi....not good....pressure in the fuel tank. Tearing it down....piston is toast, cylinder has a little transfer but looks very usable. Very slow leak on both crank seals. Took about 2 minutes but dropped from 7 to 0?
 

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Even if I was able to get the seals out without splitting the case, I’ve never split a case and want to lol
 
I got the case split. The crank stayed with the flywheel side. The clutch side appears that there’s no shoulder for the bearing? The bearing is flush with the inside of the case, but appears to stick out on the outside by about .100. I’ll post pics tomorrow if someone doesn’t already know why I’m confused.
 
No shoulder.
Use oil pump to set bearing depth.



ok now that explains another thread I was reading about Dans 064 build. I couldn’t understand why his halves were apart and someone was worried about putting the oil pump on. Thank you
 
Welcome to AS !!

thank you! I’ve ran saws all my life, but as a lot of guys, I really had no idea how to fix them. It was always a “bad carb”.... I now realized it’s not always a carb problem. Now I’m getting older and don’t run them as much any more, but I have a passion for working on them. Over the last month I’ve acquired a few. And I made a substantial investment in the proper tools needed. And the wealth of knowledge on this board is great. I’ve looked at the other boards but like this one the best.
 
Good for you. That's a mean saw. And welcome to As

Ty glad to be here. I have a meteor piston and caber rings on the way. I need seals and a gasket kit. I plan on mKing it all pretty. I’m converting it to the HD filter. I have a new plastic carb box, but it has the hole for the tube type vent. I guess I could plug the hole and use the short stone type with cap that was on it, but I’d prefer to use the hose type. I can’t find it anywhere. Stihl dealer told me NLA....
 
The vents on older 1122s can be replaced with a piece of line and an Echo style vent. There’s plenty of room in the carb box for them.
 
The vents on older 1122s can be replaced with a piece of line and an Echo style vent. There’s plenty of room in the carb box for them.
The vents on older 1122s can be replaced with a piece of line and an Echo style vent. There’s plenty of room in the carb box for them.

I will use that as a last resort. I’d rather find the oem one if someone happens to know of a stash. I prolly have about a month till it’s all back together between work and waiting for parts. A new oem gasket kit is $60 on eBay. Is the deLer cheaper?
 
I picked up 4 saws today all from the same guy. His tree service went out of business in 2010. A 046 mag, a 066 mag, a 087 mag, and a 200t. None have been ran in 10 years. Should I pull jugs off and inspect? Maybe squirt oil down into the bearings? Or just gas and try to fire? I’m new to this and would hate to cause unnecessary damage.
 

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