Brufab - my spreadsheet says I have 48691 rings available, I also appear to have on 48695 piston assembly should you decide to go that route.
Mark
Mark
McCulloch Chain Saws
- Thread starter Bruce Hopf
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Thanks mark. I am gonna see if I can get spark and go from there. After I sprayed some fogging oil in the cylinder the compression picked up some.
Things keep getting better. This is my first Mac so I'm kinda out of my element here.
Well I got spark easily but compression is at a balmy 60 psi 
it's soaking in some tranny fluid now hoping there just a bit stuck. After I sprayed fogging oil in it the compression jumped up some from nothing so alil something but not enough for combustion 
it's soaking in some tranny fluid now hoping there just a bit stuck. After I sprayed fogging oil in it the compression jumped up some from nothing so alil something but not enough for combustion 
I lost an 029 like that. Wasn't even drinking.
Nope
my dad told me to do it. I always wondered why he had a jar of BB's at the shop. We use to put them in the air hose guns and shoot at each other. " Your Gonna Shoot Your Eye Out !!! ". Nope but cracked a few windows. That was in the 60's.
Nope
The pneumatic BB machine guns at the county fair caught my attention as a young boy (also in the 60s). When I got home, I went out to the shed and made my own with the barrel out of my Daisy, a high-capacity magazine fashioned from several plastic straws banded together end to end, shaped in an arch and attached to the feed slot, and an air gun nozzle mounted to the barrel's back end. It worked flawlessly so long as you maintained the right elevation for the magazine to gravity flow the last few BBs. It would empty an 18" tube of BBs in seconds. I placed a board against the shed for a penetration test. Penetration was not as expected resulting in dozens of ricochets hitting my dad and brother in the distance working on our house roof. No need for ATF intervention, Pop came off the roof and took care of my little BB machine gun. It certainly was fun while it lasted.
Ron
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Does mark have one of those in the museum? Pretty cool man!
I got up to 90#psi overnight I soaked in some stuff and got the rings to move freely, hopefully it's enough to get it to pop a few times. Then maybe the ring seal will improve???? Mac 1-72 
Reed valve saw with 90 PSI should run.
I do not have a D20, had an opportunity to get one earlier this year but I just don't have space for it at this time.
Mark
I do not have a D20, had an opportunity to get one earlier this year but I just don't have space for it at this time.
Mark
Someone said the reeds are bad or stuck? I have great spark. The rings were stuck they can move freely now as I have moved them around the piston. The intake side of cylinder is pristine. What makes no sense is that there is a brand new never seen a chain rim sprocket on it? I tried a shot of ether in the cylinder and got nothing. It coughed a couple times when there was still a lot of oil in the cylinder then once that drained out I got nothing. I will probably sell as a parts saw if anyone interested pm me. The clutch, clutch drum, and recoil and air filter and flywheel cover are in excellent shape, overall the saw has little wear on it which surprised me that I can't get it to run. I have dumped a lil bit of fuel in the carb but got nowhere. I'm just not at the point of repair knowledge on how to tear down and replace a piston. This saw has paper thin rings too
0.024" actually. Paper is roughly 0.003"...
Yea I was shocked at the thickness, I read on here about the thin Mac rings but this is my first time seeing them my Remington rings are like .125 lol I wish a Mac enthusiast lived close by to help with a rebuild because the saw looks super cool. 
Bruno,don't give up on it so quickly.Keep some lube in the cylinder & pull it over from time to time.Take a compression test from time to time as well.The compression may continue to come up a bit more.Put it on hold for now & as your knowledge & self confidence grows you'll be able to tackle it.If someone told me 5 yrs.ago that I'd be tearing into saws the way I am now I wouldn't have believed them.I'm still by no means proficient at some models,but I'm learning on a daily basis..
Any idea where the serial is on this PM700? You know I bought this as a pig in a poke with the 1-50 but its starting to grow on me.
If you get the 700 cleaned up and running right it’ll keep up with my 372xp and both weigh the same with a 28” bar! Yay yellow!
Yes a 700 is indeed an awesome saw.
I have one I use regularly and two others that will run but need a little attention. Would but 3 more if I found em cheap enough!
This evening I lost my Uncle, my McCulloch saw mentor, my friend. RIP Uncle Gary. I shall miss our talks, and working on saws together. I love you!
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