McCulloch Chain Saws

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2FB3C5D7-12F5-4C0D-A1DC-7466EC552150.jpeg 6DB7AB49-3B02-4651-892F-9572FD2BC2F7.jpeg Having more projects than I’ll complete in this current lifetime, I was thinking of listing this 10 series geardrive for sale. Can any one help ID it? I don’t see a tag in the air box, although it could be hidden under the monstrous bullfrog carb. I know there were a variety of the gear drive 10 series Macs, I have no idea of the differences and the air filter cover sticker is missing. Thanks!
 
I am still working on it but I may be trading a modern saw such as a stihl 026, 029 or husqvarna 455 rancher for a Mcculloch g-70. The g-70 is missing the starter rope, and the gas cap. How much of this saw is shared with a 10 series. I hope I get it because I have always been wanting one.


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View attachment 616253 View attachment 616252 Having more projects than I’ll complete in this current lifetime, I was thinking of listing this 10 series geardrive for sale. Can any one help ID it? I don’t see a tag in the air box, although it could be hidden under the monstrous bullfrog carb. I know there were a variety of the gear drive 10 series Macs, I have no idea of the differences and the air filter cover sticker is missing. Thanks!

I believe you have a 5-10g


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With no compression release and the low profile AF cover I would say it is a 2-10G. Mine had the handle/fuel tank replaced with one from a more modern 10 Series saw. Although the compression on mine seems low, it runs and cuts very well.

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My Super LG-6 also has the later style fuel tank and AF cover but that was correct for that saw.

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Mark
 
Guys, I have a 7-10a coming. The guy says the compression is 100 psi, so it probably needs rings or has a scored piston. Would this is have thin rings? Also how common is scored pistons on these? Thanks


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Earlier 7-10 models like mine had thick rings (63290/87166), but looking through the IPL's I see some later models did have thin rings (89732). To confuse the issue, if you look at the McCulloch cylinder/piston charts you will find the same piston (85239) described using the thick rings (87166) and the thin rings (89732). I think in fact the piston used with the thick rings was 69030 or 85240 but they weren't very careful when they were printing the piston/cylinder lists. You won't find 69030 in any piston/cylinder list but it appears in the IPL's.

Unfortunately is was common for these saws to be run too lean and scored, the SP70 and PM700 were more likely to be scored than the 7-10 in my limited experience. Those both happen to be chrome bore models and I have 3 or 3 PM700 saws and a couple of SP70's in the attic that suffered such a fate.

The early 7-10 saws had a cast iron bore and seemed to be less prone to scoring problems.

A long while back Steve AKA 6-10 asked about the 6-10 vs 7-10 pistons so I took some photos. The piston on the left is from a later model 7-10 with the thin rings PN 85239, the piston on the right is from an early 7-10 or 6-10, PN 85240.

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Mark
 
Guys, I have a 7-10a coming. The guy says the compression is 100 psi, so it probably needs rings or has a scored piston. Would this is have thin rings? Also how common is scored pistons on these? Thanks


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my two have thick rings they are not hard to get they might just be stuck my ugly one was stuck due to sitting for a long time..just take the exhust off and look at them to see what it has..enjoy it its a great one

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I can only assume so. Mine was well used. Mark has it now. I believe he rebuilt it. Kevin has rebuilt his and I believe he has a post comparing it to a 800. I know he really likes his.

Ron
 
mark is right about what he said although i dont have all the ones he mentioned or all of them like he has i do use mine alot i have two 10-10s two 7-10s a 700pm a pm55 a 10-10 pm 8200pm and a pm 800 thats all i have of the ones mark mentioned i do have a few more and yes the 10-10s are nice but the 10-10pm are little devils will pull a 28 better than the 10-10s so they have 20s the pm55 pulls a 28 hard and all day i favor it over the 10-10 and the 10-10s as far as the 7-10 and pm700 comparison mark is right the 7-10 is better very strong and will pull a 32 all day if you ask it but the balance is off more nose heavy than with a 28 well balanced with a 28 same with the pm700 but the 700 isnt that much slower and is still a very strong saw i love mine and the 7-10 but to me they are the perfect size as far as power goes not much they cant handle you can even do small stuff real quick cant go wrong with either one of those as far as the 82s go if mark is right and the 850 is the best one and will out cut the 8200 and 800 that i have well i must have one cause the 8200 will out cut the 800 but not by much ron is right about the 800 i can bury the 34 i got on it and lean on it hard and it doesnt care the 8200 doesnt care either and they both run real smooth the 8200 is a little smoother and all the ones ive mentioned will keep up or out cut the new age saws of similar size..i do,have a mini mac 35 with an 18 on it thats a little monster love that thing found it in an antbed i use it to cut trees down just because it will..mabe this helps you out a little with your question

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Ron
 
I ran my freshly rebuilt PM8200, a very nice PM800, PM805, and PM850 against my Dolmar 7900 at the WKY GTG a couple of years ago. The PM850 was the closest but none were as fast as the 7900 in a 24" diameter sycamore log. The Domar only has a 25" bar so we couldn't compare in anything larger. The PM8200 seems like a quick saw, but didn't hold up against the 850 or the 7900. For practical purposes cutting all day I don't think the average guy would see a big difference except that the Dolmar is lighter and has the muffler pointing away from you.

Mark
 
Thinking of these saws on the beach. How will an SP80 compare to a Pioneer P51? P51 to the 7900 and PM800?
Toes in sand thinking of saws and wiod cutting. Got it bad eh!
 

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