MCCULLOCH The official McCulloch thread

[PogoInTheWoods]

Are the A, B, C designations still applicable to the 8200? I only show one piston part number -- 300687 -- with no designation.

 

[joeymt33]

Are the A, B, C designations still applicable to the 8200? I only show one piston part number -- 300687 -- with no designation.

It's not a A,B,C. It a completely different piston.

Kinda sucks but that's the way it is.

 

[Al Smith]

I did find the IPL on my microfiche .It's kind of grainy to look at for some reason .The pin bearing is 224971 ,which I suppose if you could cross reference it would tell the piston pin OD which by looking at the pic of same looks larger than an 850 .

Nothing however was mentioned in the list of pistons,rings etc for that model in the info I have.Now the question,could it be possible to find a pin bearing with the ID of an 850 and the od of the rod ID size?If so what holds the pin in an 850 .Is it a press fit in the piston bearings or is it a press fit in the rod ?I'm asking because I honestly do not know .Rather is it a heat shrink fit in the rod .

Automotive pistons before they went back to bushed rods and circlips were assembeled by using an induction heater to expand the rod and then it was heat shrink fit which took a 50 ton press to remove .It was done by a machine that could assemble 6 about every 30 seconds or so or about 5 seconds per assembly.

 

[Al Smith]

More of same .I would guess as late as the 8200 came on the market methods of plating and honing were more concise eliminating the need for 3 sizes of pistons on the 82 cc models .My guess without a set of micrometers and a piston to look at it would be size B .Which would be good if an 850 size could be used and if it would work because size B is the most common I've seen advertised for sale .

Thinking out load I wouldn't think the cylinder porting and there for the piston center pin to crown or center line to skirt would change.Speculation on my part but I suspect the whole idea behind the 8200 was pressed together crankshaft with a solid rod which by the way Lombard had years before that .McCulloch as usual towards the end was reluctant to change much of anything .

On that historically that I think after R McCulloch went kind of bonkers and the board of directors took the reins they choked the goose that laid the golden egg,lost the farm in so many words .By the time someone wised up companies like Stihl and Husqvarna had the goose and wouldn't give it back .

 

[heimannm]

The PM8200 piston is completely different from the other saws. On most McCulloch saws the wrist pin is pressed through the rod to hold it in place, and the needle bearings on in the piston. On the PM8200 there is a bearing in the top end of the connecting rod and the wrist pin is held in place with retaining rings (circlips).

I did not have the inclination to take side by side photos and measurements when I had the PM8200 apart but it sure seems like they were very obviously different from the rest of the Mac saws.

PM8200



PM805



Mark

 

[Al Smith]

Well on that maybe the idea of a complete crankshaft piston assembly from an 850 or something ?

 

[PogoInTheWoods]

It sure would be cool to find a workaround for the problem. And I would suspect that a complete crank/piston assembly from another of the 82cc saws would probably cost less than an 8200 piston anyway (if you could ever find one!). On the other hand, what makes the 8200 unique (performance aside) is it's radical design change from the rest of em. I think I'm gonna bite the bullet and buy a piston if the one I'm aware of is actually the one I need -- and my cylinder isn't gouged or otherwise NFG. Now THAT would be a reason to try a whole crank/piston assembly solution from one of the others fer sure.

 

[Al Smith]

Probably a good choice .Due to the rarity it would be nice to keep it original .

 

[fossil]

I would consider you and I rare due to involvement with saws and age and all. Poge is creeping up too.

 

[joeymt33]

All this talk of the p.m. 8200 makes me wish I hadn't sold that new old stock one that I had. [emoji30]

 

[astnmacgto]

All this talk of the p.m. 8200 makes me wish I hadn't sold that new old stock one that I had. [emoji30]

Ik where you can find one that is in darn near perfect condition, it's expensive though

 

[astnmacgto]

Idk how much they are worth really, it's super clean, I believe he said 750 would bring it home

 

[joeymt33]

Ouch! Buy low and sell high.....or don't sell at all

 

[Al Smith]

I would consider you and I rare due to involvement with saws and age and all. Poge is creeping up too.

You might have a point there . Age is only a number though .
Really if you stop and think about being long in the tooth you can still do stuff at damn near 70 you could at 35 .It's not as intense nor as frequent perhaps.My dad RIP was running a heavy McCulloch chainsaw when he was over 80 .Having that same good blood cursing through my veins I see no reason to think I should be any different .

Some of that other stuff I won't go into detail about they make pills for .Nothing to worry about just keep on keepin on .--I still have a twinkle in my eye and a spring to my step and a big grin on my face .

 

[PogoInTheWoods]

I would consider you and I rare due to involvement with saws and age and all. Poge is creeping up too.

-I still have a twinkle in my eye and a spring to my step and a big grin on my face .

I hope I still do when I'm as old as you guys! LOL

 

[Al Smith]

It's not a problem,just never get old in your mind,you'll be okay .Myself I'll never ever rust up but I might burn out .Then again it's a better option than vegetating as a couch potato.BTW I can still spur a tree if I have to but I much prefer a bucket truck --on that at nearly 69 there are guys older than myself can still do it too.

 

[heimannm]

This is a McCulloch thread, right? I tried to compare the Titan 57's; one with 3/8" pitch and one with .325. Not sure I could tell all that much difference.

 

[PogoInTheWoods]

Tank still leaks. A quart of Red-Kote should be here tomorrow. Also received a small parcel from Iowa today. Thank you, sir.

Another coat of color and a clear coat and it'll be time to start scuffin' it back up again. The Sunburst Yellow looks pretty good and the Satin Black works for me.

And Joe Salva is working on an SP81 decal for me. Had one partially designed but needed some additional measurements and a rubbing template which hopefully I provided in enough detail for him to do a small production run and add them to his Mac offerings. Will be a nice finishing touch for my first total Mac rebuild.

I think I'll run .325 on it.

 

[sawfun]

This is a McCulloch thread, right? I tried to compare the Titan 57's; one with 3/8" pitch and one with .325. Not sure I could tell all that much difference.

View attachment 51808

Its would be fun to see a fair fight with the 57 against a 10-10 or 10-10S. Both with 3/8 chain.

 

[T.Roller]

Anyone have a 125 they are looking to get rid of? I dunno if I could even afford one bit I'd like to see what yall have and prices.