What is the ultimate McCulloch saw based on the 10 series chassis

[RandyMac]

The World has moved on, some things were left behind.

!986, had a steel plate holding my leg together.

 

[rwoods]

The World has moved on, some things were left behind.

!986, had a steel plate holding my leg together.
View attachment 539968

I thought I posted this question yesterday but can't find it. Randy, do you still own a PM850?

Ron

 

[RandyMac]

Ron, no I don't right now, I do have most of the parts to put one together, including a nice 32'' Windsor bar.
Getting to the point of actually building it, is in the future yet.

 

[rwoods]

Randy, this thread may be of interest to you.

Doing a rebuild on a McCulloch Pro Mac 850.
Started out pretty dirty. Compression at 150psi.
Performed a leak down test and found blow by threw the rings.
Performed pressure test on the crank case and found the PTO side crank case seal leaking. During tare down it had string wrapped around the PTO crank case seal. See pic)
After a lot of cleaning got it apart.

Ron

 

[Bret4207]

I'm in the late 7-10A camp. Fantastic saw for the weight.

 

[svk]

Did Mac put any HP ratings on these saws? I've never seen any.

 

[emf123]

They did for the older saws but I've never seen anything on the 10-series saws. Attached is an article on the SP80 that I copied out of a Chainsaw Age Magazine. Really good info, but they were just pulling numbers out of their ass when comparing it to other models.

 

[old 040]

I picked up my first 7-10A a few months back, not the prettiest, but sure runs damn good!

 

[heimannm]

Earlier model with the lever type compression release. I would say McCulloch had a good design on the porting for the 7-10 model.

Mark

 

[old 040]

Earlier model with the lever type compression release. I would say McCulloch had a good design on the porting for the 7-10 model.

Mark

I've read elsewhere that 7-10's were more radically ported, same as the 10-10s, another saw I picked up about two months ago.....

 

[heimannm]

I have a several 10-10S runners and one PM55 with a new cylinder and piston. The 10-10S saws can compare to the PM55 but I expect it is only the difference in run time since they are the same displacement.

I can't compare the cylinders by part number as McCulloch changed their scheme between the two. The PM55 is 89435 and the 10-10S is 214672.

Mark

 

[rwoods]

Mcc Advertising late 80.s ?

Hi

Its the first and only that shows kw/hp specificationsView attachment 270412View attachment 270413

Did Mac put any HP ratings on these saws? I've never seen any.

Ron

 

[rwoods]

I see that the attachments don't work. I can't remember the numbers but here was my reaction:

If those numbers are accurate, a DE80 is more powerful than a Stihl 660. Note the difference between a PM700 and a DE80 - I can attest in my experience that the difference between a PM700 and a PM800 is much greater than the displacement difference would indicate. My PM800s also guzzle fuel disproportionately to any of my saws. These numbers also put the PM700 in the same range as a Stihl 362. Based upon my experience with an 036Pro, I would tend to agree although the PM700 has a lot more torque. Ron

Ron

 

[fechtichmac]

I see that the attachments don't work. I can't remember the numbers but here was my reaction:



Ron

Hi !
Can do another pic of this ad , tomorrow.
There s many attachments gone lost on AS..
E.

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[svk]

Hi !
Can do another pic of this ad , tomorrow.
There s many attachments gone lost on AS..
E.

Gesendet von meinem SM-G928F mit Tapatalk

Another victim of Linkbucks, may they RIP!

 

[RandyMac]

I'm guessing that the 82cc 10 Series has around 6 HP in the neighborhood of 8-9k RPM.
I had my Super 250 dyno'ed at a water pump outfit in Sac, it had 6.7@8500 and nearly 8 foot pounds torque at 7200.
The 660 I had probably had another usable 500 rpm over the Super 250.

 

[rwoods]

Based upon what I have read here from those who have a Stihl 460 and an 82cc Mac and what I have observed cutting side by side with a 460, I would say Randy is on the money.

IIRC the brochure in question translated to 7 or 8 hp. But I also recall Sach Dolmar listing 12hp for their big saw.

Ron

 

[sawfun]

Based upon what I have read here from those who have a Stihl 460 and an 82cc Mac and what I have observed cutting side by side with a 460, I would say Randy is on the money.

IIRC the brochure in question translated to 7 or 8 hp. But I also recall Sach Dolmar listing 12hp for their big saw.

Ron

I ran my Stihl 460 against my 800 and the 460 was a lot faster but could be stopped fairly easily where the 800 was damn hard to stop. That was side by side with 28" bars and new Oregon round chisel chain. I did the same test with a 700 vs my 10mm 044 and had the same results with both running 20" bars. Except the 700 could not be stopped in this bar length no matter how hard I pulled. And my 850s have been noticeably stronger than my "like new" 800. Mac 850's pull a 32" bar buried in white oak or pitchy fir without a sweat and would likely do the same with a 36" bar, mine sure have anyway. As for vibes, my 800 is as smooth as my 372. Way, way, better than a 460 or 660 for sure.

 

[RandyMac]

There is another option, the 10 series gear-drives. A 2-10G with a 1-10.

 

[fechtichmac]

Here is what I found:

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