I have seen a few folks get creative when the retaining ring or groove were no longer serviceable.
Mark
Mark
Thanks ....please let me knowThis guy on ebay has a few .020 oversize pistons. The price doesn't seem too bad to me. I've gotten kart parts from him before. Easy to deal with.
https://www.ebay.com/itm/VINTAGE-NO...p2349624.m46890.l6249&mkrid=711-127632-2357-0
I may have a good used piston from an S44A that will fit your 1-70. I'll have a look in the bin tomorrow and let ya know
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I'm no mac expert but sounds like a good deal. That one bar looks like it's 28"Thank you all for the information in the previous replies.
Alright so, that large mystery mac has had a presence in the back of my mind for several days. Even though I'm skeptical of it because of its outward condition, I've had a strong gut feeling that it was a deal I should be pursuing. So I did.
It turned out to be a somewhat fruitful opportunity, because the guy had more saws that he was getting rid of. In total, I came home with four macs for $160.
Here's the breakdown of what I know from giving things a quick 10 minute look over since I got home.
Big saw: In better condition externally than I thought it would be, although there's a chunk of material missing near the air filter. Appears to have the numbers 1-71 811 on the bottom. There's also "81" that were X'd out. Turning over the engine by hand does not inspire confidence, compression feels weak. Came with an Oregon 28" hardnose bar that is in really good shape beyond the surface rust.
10 series mac?: Haven't messed with it yet, serious mag rot happening on the bottom, everything else external seems decent. Model 60005.
Mac 300: In surprisingly good shape. Compression feels good and it starts on a prime. Came with a nice bar.
Partial Mac 33?: I think it's a model 33? Something funky happening with the coil and flywheel, it's like they're somewhat wedged together. Also came with a nice bar.
I have to admit, I'm not feeling so confident about this deal. I really wanted the big mac to be a runner, but the weak feeling compression doesn't inspire confidence. How do you remove the muffler off that saw? I need to get in and look at the piston and cylinder.
At the very least, I figure if nothing else I could keep the nice 300 and maybe make some of my money back selling the rest as parts saws if their engines turn out to be junk.
What do you guys think? Good or bad deal?
Some pics
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I've had pretty good luck with Frawley's.If they don't have what you need try Bob Johnson.Anyone know where to get .404 .058 72 drivelink chain at? And possibly a loop of .404 .058 66 drivelinks?
That's the guy! He said he would spin me up a couple loops. Just trying to justify 100$ for the 2 chains lol. Thank you for your time researching and helping me out!Another option. He may spin up exactly what you're looking for if you contact him directly. I've dealt with him before and he was very helpful and responsive.
https://www.ebay.com/itm/184251894274
Yeah,Mark is a great guy.We did some parts swapping back & forth & he worked on a PM310 for me.He's a very busy man,but he'll find the time.Heimannm? It would be an honor to get something from him. That guy is the master of macs!
Yep,he's the old school guy.Ok thanks. Is that the old school guy I have heard about in the thread? Yea each bar I have I like to have 2 chains for. They will most likely outlive me and the saws.
Thanks and very true. What about the throttle latch?Pro Mac 10-10S and PM 55 both had the compression release and were 1.813" bore. Might be difficult to see 0.0625" difference if you are using a straw through the exhaust port.
Mark
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