Fair enough. You were going to sleeve it from memory?
McCulloch Chain Saws
- Thread starter Bruce Hopf
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Fair enough. You were going to sleeve it from memory?
Walter Glover
ArboristSite Guru
Yes I believe that to be a worthy approach. Piston from a 610 and a diy cast iron sleeve in a shrink fit to cylinder
Are the pistons that hard to get?
Impressive project to take on really
Impressive project to take on really
Walter Glover
ArboristSite Guru
Chainswr had the piston and cheap at the time iirc $19.10usd
Thank you it has me sweating whenever I think about it lol
Thank you it has me sweating whenever I think about it lol
Hahaha sorry about that
kbeck
ArboristSite Member
I bought a beat up poulan from there just for parts I was the only bidder so was cheap, except shipping was 3 times what I paid for the saw. very worthwhile just don't expect fast shipping, I also have asked for details on some of the saws no replys.
kbeck
ArboristSite Member
I noticed that too with some of the poulan saws you have to subtract the piston ring pin width when the rings are flat against the pin. just did a 3000 like that compression was a solid 130 with used parts. Kevin
I bought about 4 or 5 saws from the seller all were good except for one.What I like about the seller is that she provides free returns,so if something isn't acceptable I can send it back free of charge.I only sent back that one saw,it was pathetic,but if you're not going to do a simple reply,then pay the price of free return shipping.
Ed
You won the internet with that one! Omg lol!
My brother was at one of the local antique shops this morning and sent me these pics. It came from whistling jacks lodge up on chinook pass when it closed recently. Looks like they want $250. I’m tempted but have nowhere to put it lol! Anyways enjoy a piece of PNW history
Ok,
In the interest of the 70 cc ten series cause I stripped my latest Pro Mac 700 acquisition and port timed it.
This saw looks to have never been tampered with, its a 600061B, carb dated 1-79. Thin ring, divided transfer, unbridged exhaust, and in good shape. I will picture it once I run it through my works washing plant next week. Its a right manky thing, despite already been cleaned as best you can intact.
Exhaust opens 100' ATDC - 160' duration.
Transfer opens 117' ATDC giving 17' blow down.
Intake opens 61' BTDC - 122' duration.
As I mentioned earlier, the exhaust / transfer timings are similar to more modern designs. The intake duration is short compared to modern designs. This likely explains the high torque / low rpm characteristic of the 700.
Lets see if we can find some more data - afraid I don't have a 7-10. Mean time I will give some thought about modification. The short intake is an issue. I suspect the exhaust, whist not short on noise, is short on optimal performance. I am prepared to loose some torque at low RPM to pick up some more RPM BHP on this saw. I don't want to turn it to a peaky boggy saw, or end up with excessive reversal on intake - spit back - by over doing intake duration.
Roland.
In the interest of the 70 cc ten series cause I stripped my latest Pro Mac 700 acquisition and port timed it.
This saw looks to have never been tampered with, its a 600061B, carb dated 1-79. Thin ring, divided transfer, unbridged exhaust, and in good shape. I will picture it once I run it through my works washing plant next week. Its a right manky thing, despite already been cleaned as best you can intact.
Exhaust opens 100' ATDC - 160' duration.
Transfer opens 117' ATDC giving 17' blow down.
Intake opens 61' BTDC - 122' duration.
As I mentioned earlier, the exhaust / transfer timings are similar to more modern designs. The intake duration is short compared to modern designs. This likely explains the high torque / low rpm characteristic of the 700.
Lets see if we can find some more data - afraid I don't have a 7-10. Mean time I will give some thought about modification. The short intake is an issue. I suspect the exhaust, whist not short on noise, is short on optimal performance. I am prepared to loose some torque at low RPM to pick up some more RPM BHP on this saw. I don't want to turn it to a peaky boggy saw, or end up with excessive reversal on intake - spit back - by over doing intake duration.
Roland.
Thank you very much that's nice information
North East Tennessee Saturday MAC Report
Didn't even notice the weather today so let just call it a beautiful day in North East Tennessee. The woodlot is out of wood. I took the afternoon off mid-week to bring in two white Oaks - thought it would take a couple hours, put in almost 7 hours. No MAC work. Did some scouting and phone calling - found three bull dozed red oaks on relatively level ground that were already limbed but each still had its root ball. Perfect size for the PM800. Due to the Conoravirus cancellations, I was suddenly free of Friday evening obligations so I used the time to make two loops of semi-chisel chains for the PM800, prep the PM800, put together some 32/1 mix and got the trailer hitched last night.
Last week Brian re-injured his shoulder, so I went solo. Didn't think to take any pictures until I was almost done.
Third of four loads. It took two skidsteers to parbuckle off the side the second load so I cut these to fit the other way. Made for some challenging chain binding and a slooow ride to the woodlot. This load parbuckled off the rear fairly easy though we had to have someone in the truck on the brakes.
As I said the woodlot is empty.
They are bucking, splitting and hauling wood brought in today. A mild winter so far, but I think we are going for a new volume record.
I told you Brian was hardheaded, here he is with his PM800 bad shoulder and all. I bet Lee had to shift gears for him on the way home. He even had his SP125C out today. He and Lee are in the first woodlot picture making sure everything is cut today.
Be Safe Out There.
Ron
This valuable report is provided through the the generous support of MacNuts like you and Blind Squirrel Falling, one of America's greatest imaginary businesses.
Didn't even notice the weather today so let just call it a beautiful day in North East Tennessee. The woodlot is out of wood. I took the afternoon off mid-week to bring in two white Oaks - thought it would take a couple hours, put in almost 7 hours. No MAC work. Did some scouting and phone calling - found three bull dozed red oaks on relatively level ground that were already limbed but each still had its root ball. Perfect size for the PM800. Due to the Conoravirus cancellations, I was suddenly free of Friday evening obligations so I used the time to make two loops of semi-chisel chains for the PM800, prep the PM800, put together some 32/1 mix and got the trailer hitched last night.
Last week Brian re-injured his shoulder, so I went solo. Didn't think to take any pictures until I was almost done.
Third of four loads. It took two skidsteers to parbuckle off the side the second load so I cut these to fit the other way. Made for some challenging chain binding and a slooow ride to the woodlot. This load parbuckled off the rear fairly easy though we had to have someone in the truck on the brakes.
As I said the woodlot is empty.
They are bucking, splitting and hauling wood brought in today. A mild winter so far, but I think we are going for a new volume record.
I told you Brian was hardheaded, here he is with his PM800 bad shoulder and all. I bet Lee had to shift gears for him on the way home. He even had his SP125C out today. He and Lee are in the first woodlot picture making sure everything is cut today.
Be Safe Out There.
Ron
This valuable report is provided through the the generous support of MacNuts like you and Blind Squirrel Falling, one of America's greatest imaginary businesses.
Attachments
May want to measure squish (the best you can) while you're at it, too. I know going through the plug hole isn't an optimum method but may help provide a basis for establishing an average number.
I'm sorry, I had to post this:
I don't think it's a bad restoration job.
(it is not mine, it's a bay find.)
I don't think it's a bad restoration job.
(it is not mine, it's a bay find.)
My son & I went out cutting today for the first time this yr.We were going to take a Homie XL-923,but the damn thing won't draw fuel after a carb rebuild last yr.It was yellow to the rescue.We had two PM700's (one had a 20 in.Windsor bar & chain on it,my $45 Feebay special,the other had a 24 in.bar on it),& a Timberbear with a 20 in.bar & chain.My son did the cutting & I did the loading.We hauled home 2 good size loads of ash.The trailer is loaded pretty good when the John Deere 140 front end bobs up & down from the weight of the wood.Lol We dropped the ash tree last April & hauled home all of the limb wood last yr.We're now into some serious sized trunk.I'll have to come up with a 28 or 30 in.bar & chain to do some serious cutting.
Ed
Ed
Decided to mess around with the 10-10 flea market saw i picked up a few weeks ago, withe the broken oiler button. Sorry Jethro but I found one too cheap to make one.
I already had a rebuilt carburetor for it and I replaced the oil button. Strangely enough I couldn't depress the button with or after running the saw . I removed and cleaned the oil pump but it was not fixing it. I could push the button with the throttle goosed running but idling it would not push.
I had a parts 10-10 and replaced it, works great now.
I already had a rebuilt carburetor for it and I replaced the oil button. Strangely enough I couldn't depress the button with or after running the saw . I removed and cleaned the oil pump but it was not fixing it. I could push the button with the throttle goosed running but idling it would not push.
I had a parts 10-10 and replaced it, works great now.
As Ron said I am hard headed, but felt the need to cut today. Just don’t feel right not cutting or helping in some way.
I started out the morning with thePM800 for some bigger stuff and then went to the 10-10S for some smaller stuff. Then Ron came in with a load of 10 to 15 inch logs and I switched back to the PM800. At lunch Ron brought in some bigger logs. I had planed to quit after lunch but knowing that Ron had a load of logs and another person had a load, I thought what the heck. Plus I had the SP125C with me and it had not been ran in a long while and needed
Some exercise. Though I was hurting I loved watching that beast chew through wood. On the last log my chan loosened for some reason. But by that time I was done. Happy but hurting. I loaded up and headed home.
By the way we are finding talents all the time that Ron has that we had no idea he could perform!!!
I started out the morning with thePM800 for some bigger stuff and then went to the 10-10S for some smaller stuff. Then Ron came in with a load of 10 to 15 inch logs and I switched back to the PM800. At lunch Ron brought in some bigger logs. I had planed to quit after lunch but knowing that Ron had a load of logs and another person had a load, I thought what the heck. Plus I had the SP125C with me and it had not been ran in a long while and needed
Some exercise. Though I was hurting I loved watching that beast chew through wood. On the last log my chan loosened for some reason. But by that time I was done. Happy but hurting. I loaded up and headed home.
By the way we are finding talents all the time that Ron has that we had no idea he could perform!!!
I have a PM700 that's giving me some problems.The oiler is pumping out oil like there's no tomorrow.I checked the screw in front of the tank cover & it was tight.The oil is coming out at the pad,but not normally,it's gushing out.
The other problem that came up is it'll run fine when I start it up cold & it'll run fine till it runs out of fuel.After refueling it acts like there's water in the fuel & there isn't.It has almost no power & very difficult to throttle up.If it were a reed saw I'd suspect reeds,but it's piston ported.I bought this saw about a yr.ago & never really used it till today.
Ed
The other problem that came up is it'll run fine when I start it up cold & it'll run fine till it runs out of fuel.After refueling it acts like there's water in the fuel & there isn't.It has almost no power & very difficult to throttle up.If it were a reed saw I'd suspect reeds,but it's piston ported.I bought this saw about a yr.ago & never really used it till today.
Ed
It sounds like you need a pro mac 60 for the in between stuff , nice and light but pulls a 24" just fine.
Your cutting skills are great.... but that flat shovel technique needs alittle work.
