Don't waste your block by boring more than it needs.
Contact Terry Ives. He has pistons in every .004 thou
up to .064 oversize.
Lee
McCulloch Chain Saws
- Thread starter Bruce Hopf
- Start date
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Don't waste your block by boring more than it needs.
Contact Terry Ives. He has pistons in every .004 thou
up to .064 oversize.
Lee
got my mcculloch 250 all torn down. I seem to be getting faster at it? Only one injury... Damn gasket scraper.... My thumb will be fine. It turns out it was a lump of carbon preventing it from passing TDC.
Everything seems in real good shape. The cylinder still has factory cross hatching. The piston shows no wear. I plan on getting it going tomorrow.
Hopefully not too long until I have both my Macs running?
I might be able to get a 36" bar with helper handle for the s55a? Its on another s55, but I have to admit the helper handle looks really stupid on it....
Everything seems in real good shape. The cylinder still has factory cross hatching. The piston shows no wear. I plan on getting it going tomorrow.
Hopefully not too long until I have both my Macs running?
I might be able to get a 36" bar with helper handle for the s55a? Its on another s55, but I have to admit the helper handle looks really stupid on it....
Eccentric
Mister Wizard
Ted after fighting the CB clutch cover on my SP-81 I've found it's much faster and less frustrating to just unbolt the handlebar. Saves time and grief. Sure makes me wish for the 'wide' full-wrap on my saws that have the CB clutch covers.....:censored:
Warped5
WingNut
... maybe I'll shoot a video ... you'll see. :bang:
I'm waiting to hear word regarding my M-I-L 86th birthday party; it looks like it will now be on Saturday to accommodate out-of-town family. If I get to go to the GTG, I can bring about anything except maybe a sharp chain. I have chains running out my ears but none sharp at the moment.
Ron - I ran the PM800 (#3 up for trade) last Saturday to finish off the stump of a tree I'd worked on several weeks back. You can see the stump in the background here. After quartering with the saw and splitting it up, I ended up with 31 pieces from one round...
This one has the most use of the three I own, but it is still pretty impressive in the cut. I will try and remember to check the compression tonight and report back.
Mark
Thanks, Mark. I am not expecting an even trade so being thinking about what you want to balance things (maybe throw in a new piston for it or $$$). Throw in as buy one and have it shipped to you as I suspect you will want to do your own rebuild.
Aaron, if you are talking about the slight of hand act you have to do to flip the cover over the top of the saw with a little practice you should get it down. Even so I got tired of it and set my favorite PM800 up with a half wrap but after falling a few larger trees this spring I am going back to the full wrap - I don't really know how I got by for 30 years backbarring with a halfwrap PM700.
If you are talking about the bar nuts, I use one of two tool setups: a 1/4" drive long extension and socket will clear the handlebar or a long 3/8" drive socket and small breaker bar is stout enough to nudge the handlebar out of your way and you can speed things along by using it straight like a nut driver when you don't need the leverage to break it loose or tighten it down.
You and others more learned than me may already know that there is a purpose for those little tabs on the sawdust shield - I didn't - if you press on the right one at the right time they make chain removal and installation much easier.
Ron
Eccentric
Mister Wizard
Ron I've already figured out the 'tricks' for dealing with the bar nuts (tool clearance with the handlebar, and the proximity of one of the bar nuts to the chainbrake band end). Also have figured out the tricks for threading a chain (including a 36" loop) around the clutch with a full wrap bar.
Frustration comes from the chainbrake type clutch cover and getting it on and off the saw with the small space between the 'narrow' full wrap handlebar, the bar studs, and the clutch on my SP-81. The non-CB cover isn't hard to get off and on in comparison. Just getting the cover clear of the studs is a challenge.........let alone getting it completely clear of the saw. Either it hangs on the clutch, the studs, the tank, the handlebar, or a combination them...
Not a lot of room there. Forgive the red saw. Only pic I have of the right side of the saw in question. Notice how close the CB lever is to the right side of the handlebar. The cover has to come out quite a bit to clear the clutch and the studs too...
Much more room with the non-CB clutch cover. Need to find a 'wide' full-wrap...
Frustration comes from the chainbrake type clutch cover and getting it on and off the saw with the small space between the 'narrow' full wrap handlebar, the bar studs, and the clutch on my SP-81. The non-CB cover isn't hard to get off and on in comparison. Just getting the cover clear of the studs is a challenge.........let alone getting it completely clear of the saw. Either it hangs on the clutch, the studs, the tank, the handlebar, or a combination them...
Not a lot of room there. Forgive the red saw. Only pic I have of the right side of the saw in question. Notice how close the CB lever is to the right side of the handlebar. The cover has to come out quite a bit to clear the clutch and the studs too...
Much more room with the non-CB clutch cover. Need to find a 'wide' full-wrap...
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Warped5
WingNut
Mark has one and it may be available.
As noted earlier, I chose to get the 'normal' one from him and it now adorns my SP70. Most likely so it could be brake-less, thus matching my SP81. I am conducting an internal debate right now and may do the same thing with the SP60 that's on the bench.
OldDeadWood
ArboristSite Operative
Bp-1
[video]http://s1183.photobucket.com/user/OldWoodEye9/media/MOV09898.mp4.html[/video]
Hah!!!!
[video]http://s1183.photobucket.com/user/OldWoodEye9/media/MOV09898.mp4.html[/video]
Hah!!!!
RandyMac
Stiff Member
ozflea
Good ol' BP Zoom 25-1
Wonder how come its got a PM105 CLUTCH COVER ON IT
ozflea
Good ol' BP Zoom 25-1
Aaron, so your full wrap is not as wide as the full wrap shown on Ted's PM800? I never kept any of my older 82cc MACs long enough to notice any width difference between their handlebars and the newer MACs. If you just need one like Ted's, surely someone here can fix you up. You will have to drill new holes for the front mount. If I rob many more parts from my remaining project saw I'll have a spare one by default. Ron
PS I took note with pride your drilling hammer picture. That too is my tool of choice despite the ribbing the PNW loggers gave me. Among many other ways, not the least of which is my general incompetence, if I just want to highlight to others in the logging forum that I am not a logger, I remind Bob that I carry a hammer. He, of course, needs no reminder from me.
PS I took note with pride your drilling hammer picture. That too is my tool of choice despite the ribbing the PNW loggers gave me. Among many other ways, not the least of which is my general incompetence, if I just want to highlight to others in the logging forum that I am not a logger, I remind Bob that I carry a hammer. He, of course, needs no reminder from me.
I would say by looking at the photo that the saw is
a super 797 and was converted to left hand start.
Lee
Warped5
WingNut
Aaron and I suffer from the same affliction .... neither one of us has the 'wider' full wrap.
Fits the saw exactly like this one does, just has more room on the RH side to allow R&R on that clutch cover to be easier.
Eccentric
Mister Wizard
Could just be the different angles, but Teds saw sure looks to have more room between the clutch cover (and bar studs) and the handle bar than my SP-81 does.
Ron if I can find a wider full wrap for this saw and my other SP-81 (waiting to be rebuilt after the PM850 is done) I'll surely swap them. I believe the mounting is the same.........the bar itself is just wider on the clutch side. Will have to compare the handlebar I got from RandyMac for the PM850 build with what's on my SP-81's. The handlebar looked wider when I examined it a couple weeks ago. Been too busy to do much else with saws since before the GTG. Will get back into the swing of things this weekend. If your handlebar becomes a spare I'll be most interested in it.
Ted, I know pictures can be deceiving but your handlebar looks just like mine. I just measured the four of mine that currently have bars on them and they all measure 1 1/4" from the chainbrake lever at the pivot point to the inside of the handlebar. Is your's tighter than that? Ron
Aaron, this is just a hunch but I would be willing to bet that all PM850 full wraps are the same as the newer ones with exception to the padding. The SP's 82cc MACs I believe were introduced before chainbrakes were standard so like an SP125 they likely had narrower handlebars than the chainbrake models. Also the front holes are horizonal on the SP models and vertical on the PM850 and later models. Ron
Eccentric
Mister Wizard
I believe you're right Ron. The PM850/800/etc handlebars look more 'square' than my SP-81 handlebars (which look more like a rectangle stood on end). Bob knows I use a hammer to drive wedges. I've stood within 10 feet of him while doing just that. Was wondering what 'the look' was for.....
Eccentric
Mister Wizard
My SP-81 handlebars have much less than an inch of clearance between them and the CB lever. I'll have to measure the clearance next time I'm in the shop.
joeymt33
I bleed YELLOW!
The pm850 and later were clearanced for the CB cover. As y'all already mentioned, there are differences in mounting locations and padding on the later wider handles but they are all the same width. The sp80 and sp81 have the narrow handle. Which us a PITA to use with a CB cover.
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