Chainsaw Repair

Hey Saw Guys! Good to find this forum!  I've had this old Mac since new in about 77 or so.... Back then I took it to a shop to have it worked on (don't remember what it needed) but when I got it back the oil tank leaked.  It still does but now I have the time to fix it.  Has anyone done this? It's my understanding that the cases have to be split. (GREAT design idea!! LOL)  If anyone could give me a few pointers I'd sure appreciate it!

BTW, I've cut many years worth of firewood with this old thing and it's always started (a little more resistant than any Stihl I've ever owned) but has run hard; still runs hard and still has the original air screen on it. (needs one NOW, tho....) Not bad for a 37 YO saw. 

Thanks FF!  I muddled through it already. You're right.  A lot of disassembly but no case splitting.  My Permatex #1 had gotten old so (being impatient) I used Hylomar.  So far so good.  The guy who did it first (30 some years ago) used a regular silicone caulk.  No wonder it leaked from that day forward.  I did commit one "faux paus" though.... I used a hammer to tap/loosen one of the rear "skid plate" screws loose.  Broke the casting at the rear on one side.  Never having seen it I didn't know how thin and weak it was.  Oh, well....  saw starts and runs even better now; can't help but wonder if air was leaking under the carb a tiny bit.  Thanks again! Hopefully this post may help prevent some other newbie from making the same mistake.

Lucky

Probabley what would work is Loctite 5900 RTV .This is the standard of the world for new engine assembley from Kia  to Rolls Royce .

However the surfaces to be sealed will need to be completely clean of any oil residue before it would work properly .

OK... I gotta be the most impatient member on this site.  I don't have time to wait for an answer. I DO have time to do stuff twice, though.   

I found some plastic "fuel line" and used that for oil pickup.  Cleaned all mating surfaces with acetone and re-assembled using Permatex #2.  I'll wait a few hrs (24) as suggested before filling with oil, but suspect I'm not gonna see the inside of this thing for a long time. Unless the plastic line melts in a couple days.  By then someone will have provided me with the correct stuff to use.  And I can do this all over again. 

As Paul Harvey used to say:  Hehhhh-heh.

I used tygon on the timberbears I have fixed.  Maybe the older 610's used something tougher than the newer timberbears but I have had to replace the lines on 2 of these. Both I used tygon line & both I used permatex gasket maker. So far no complaints.