McCulloch Chain Saws

[8433jeff]

If you are looking for a saw that you can use, the PM850 or SP60 would be good first picks.

If you are looking for a saw that will really impress people, get the 7-10.

If you are looking for a saw that will scare people with the noise and weight, get the 250.

One big advantage to the 10 Series saws above (SP60, 7-10, PM850) is they all have automatic oilers, the 250 will be manual only. Unless you have some experience operating a saw with a manual oiler only, it takes a lot of getting used to.

Having put a little run time on the 82 cc 10 Series saws lately, I will say I am quite impressed. I have plenty of the large frame 80 cc saws, but they will only come off the shelf for GTG's, any work that need doing will be assigned to the PM800 or SP81; they just plain rip and the SP81 in particular sounds good doing it. The muffler on the PM800 is just too effective...

Mark

That 7900 is going to drive you crazy, Mark, better send it up here.

 

[Eccentric]

PM850s are very desirable saws but as Randy said you have to check them thoroughly as many are toast. They are 82cc hotrods. MAC was still recommending 32 to 1 mix for these and their offspring long after it had gone to 40 to 1 on all its other saws. eBay prices range from low $200s to $400. A primo will bring $500 but Randy is the only one who deserves a primo example. Carcasses have been bringing $200 on eBay. You can ocassionally find complete saws on CraigsList for under $100. A Super PM 850 (looks to be a rebadged PM800) is worth more to a collector as there aren't many around. The immediate predecessor to the 850 was the SP81 (I believe the cylinders are identical). There are many admirers of it and Stinkbait just listed a nice one on eBay for $275 - it apparently sold quick. If it is a runner - buy it. IME most out of the NW and SE have been used in production but you can find the ocassional limited use one. Ron

I believe you're right there Ron. I have a cylinder and piston replacement "kit" from McCulloch. They list it as being suitable for use in SP81 and PM850 saws. The kit came with a new cylinder, oil tank, manual oil pump, gaskets, a piston/rings assembly, and instructions. My SP81's a good runner now, but I want to keep it going for a long time to come. The "kit" came to me in a trade recently, and I couldn't pass it up. In addition to the piece of mind that I have now (for my current SP81), I'm now encouraged to pick up a "burnt up" SP81 or PM850 to bring back to life if one comes my way for the right price on CL or feebay.

If you are looking for a saw that you can use, the PM850 or SP60 would be good first picks.

If you are looking for a saw that will really impress people, get the 7-10.

If you are looking for a saw that will scare people with the noise and weight, get the 250.

One big advantage to the 10 Series saws above (SP60, 7-10, PM850) is they all have automatic oilers, the 250 will be manual only. Unless you have some experience operating a saw with a manual oiler only, it takes a lot of getting used to.

Having put a little run time on the 82 cc 10 Series saws lately, I will say I am quite impressed. I have plenty of the large frame 80 cc saws, but they will only come off the shelf for GTG's, any work that need doing will be assigned to the PM800 or SP81; they just plain rip and the SP81 in particular sounds good doing it. The muffler on the PM800 is just too effective...

Mark

I agree Mark. My SP81 has taken over the medium-large slot in my "working stable" of firewood saws. It came to me out of the blue as part of a labor/saw trade deal. The other 77-87cc saws in my collection won't go to work as often anymore. Just for GTG's and a bit of exersise. My SXL's, PM700, and SP81 are the workhorses for me now. I can grab a six cube saw for really big stuff (and for fun of course) when needed.

I recently parted out a McCulloch 250 (to help four other saws so far), have sent one of my 77cc Homelite C5's to a friend here, and will send my 80cc McCulloch 200 to the same fellow soon. I've got one C5 left as well as a Super 250 that'll get rebuilt this winter (and may get an 'almost runner' Super 250 from another friend once the bank account recovers from the holidays). They're GTG/fun saws for me now.

That 7900 is going to drive you crazy, Mark, better send it up here.

Nice try Jeff!:jester:

 

[Clarkbug]

You might see how many turns out the screws already are. Turn the screws in and count how many turns until it is lightly seated then turn them out the same amount then add maybe 1/8 turn to it. In any case the screws should be out at least 1 turn. If they're not, that's why it's running warm.

Went out to tinker a little bit today, and I think that was the ticket. The high speed screw was maybe only 2/3rd of a turn out. I cranked it out probably another half to three quarters, and she still was pretty snappy on the throttle. Once I get a chance to put it into some wood Ill tweak a little more.

Seems to be a good runner, and the free price definitely makes it worth it!

 

[Brian13]

Got another one running. Got this Super 250 from Mr. Bowsaw when I was redoing my fathers. I decided that this one was going to get rebuilt, and tried to rob as little as possible from it. Finally got all the parts needed and put it together. Runs great, looks well used but I like it that way.

I have twins now.

 

[rwoods]

A little tinkering in the chainsaw lab tonight - 125

Tonight I took the directional round muffler off my Sawbones SP125C. It has a baffle as well as a super thick screen. You could barely see light through the screen – made me wonder how much it had been holding back the saw. Anyway, I decided to adapt one of my kart GEM mufflers. In the first picture you can see how much material needed to be removed to match the 125 oval port. I thought this to be too much to remove all the way up the neck so I “ramped” it using a round file and sand paper. The muffler has plenty of volume as the flange opening is considerably taller than the 125 port. I forgot to take a picture of it after the ramping. I could only find one kart insert for sale so I just re-drilled the muffler to accept 5/16” bolts. I didn’t want the muffler to be without some impact support so I made a bracket to snug it against (I may at some point mount the back solid if I can find the right piece of aluminum scrap). The upper bolt wouldn’t sit flat so I took (cringe all you woodworkers) a ½” forester bit and widen the corner and flatten out the surface with it. Before using the saw, I intend to safety wire the bolts as the muffler is almost a funnel for a loose bolt to enter the cylinder. I hope the forward outlet blows the sawdust down and doesn’t create a fog of dust nor melt the sawdust flap. I couldn’t wait to fired her up although it is dark. Nice MAC crackle. Seems to accelerate quicker but this could just be my imagination. Ron

Marked area to be removed:

Bracket:

Bottom half of muffler in place:

Baffle:

Complete Installation:

View attachment 208845View attachment 208846View attachment 208847View attachment 208848View attachment 208849

 

[rwoods]

More Pictures

View of outlet direction:

Side view:

Top down view:

The outlet barely clears the ground so I hope I don't start any fires when I sit the saw down.


:msp_biggrin: Ron

View attachment 208850View attachment 208851View attachment 208852

 

[rwoods]

I forgot to add that this kart muffler is narrower than the stock muffler so a chain is easy to get on and off. Ron

 

[wyk]

7-10

Does this look like a factory 7-10? Er, tennis grip aside...

 

[Eccentric]

I forgot to add that this kart muffler is narrower than the stock muffler so a chain is easy to get on and off. Ron

Ron that's just plain sexy and probably sounds fantastic.....................but I think you are gonna melt that chip flap. You're also gonna start fires if you ain't REAL careful. My 'regular' downward outlet Mac mufflers blast away loose grass and chars what's left. You're saw is gonna mark its territory for sure......:censored:

 

[Dennis Gauge]

What's the trick to popping the clutch off a 10-series?

I got the reverse-thread nut off, but the clutch won't budge.

 

[a. palmer jr.]

What's the trick to popping the clutch off a 10-series?

I got the reverse-thread nut off, but the clutch won't budge.

Does it thread also or is it keyed? The 610 series clutch just pulls off after you take the nut off.

 

[rwoods]

Ron that's just plain sexy and probably sounds fantastic.....................but I think you are gonna melt that chip flap. You're also gonna start fires if you ain't REAL careful. My 'regular' downward outlet Mac mufflers blast away loose grass and chars what's left. You're saw is gonna mark its territory for sure......:censored:

Thanks. I will be careful. I might replace the flap with metal or maybe borrow a piece of silicone cookware from the kitchen. Ron

 

[cpr]

Back from vacation and sick as a dog. Cheered myself up by making a deal on a 125c. He's supposed to have a 440 to look at, too.

EDIT: Yeah the 440 is nice, so was the price. Cross another off the list.

 

[Eccentric]

Back from vacation and sick as a dog. Cheered myself up by making a deal on a 125c. He's supposed to have a 440 to look at, too.

I know whatcha mean Charles. Been fighting a loosing battle with a raging migraine all day. Finally feeling human again. Making a deal on an SP125C would make anyone feel better. Thought I'd point one thing out here:

This is page 797 of the McCulloch thread!!!!!!!!!!!!!

 

[joeymt33]

What's the trick to popping the clutch off a 10-series?

I got the reverse-thread nut off, but the clutch won't budge.

Hit it with a rubber mallet lightly, it may take a few blows


Sent from my iPhone using Tapatalk

 

[RandyMac]

 

[Eccentric]

Great 797 "heart" pic Randy!

Keep 'em coming fellows!

 

[RandyMac]

 

[Mr. Bow Saw]

 

[leeha]

I know whatcha mean Charles. Been fighting a loosing battle with a raging migraine all day. Finally feeling human again. Making a deal on an SP125C would make anyone feel better. Thought I'd point one thing out here:

This is page 797 of the McCulloch thread!!!!!!!!!!!!!

I was just gonna do this, 797 pages of pure Mcculloch.
And the best muscle saw Mcculloch ever made. Well IMHO.



Lee