MS241C 14 picco and rim?

[Efisher26]

I read post quick and didn't see anything about it but from what I've heard Stihl picco is "low profile" chain


-Efisher26-

 

[Franny K]

[QUOTE="SawTroll, post: 6014664, member: 5399
In many cases the operator actually can use two different dl counts (one dl apart) with one set of bar and sprocket.[/QUOTE]


One pitch increment or half the drive link spacing is how much (essentially) the position of the bar changes with a drive sprocket change of one tooth. For me if the tail is too close to the sprocket to get the chain on is the thing to pay attention to. The inboard clutch has advantages as the rim sprocket can be slipped over the splines. I think the bar and chain have a range and the saw does not matter unless like stated the range of adjustment is the issue but the hole can be filed or perhaps other modification.

I can tell by wrapping the chain around the bar and a similar toothed sprocket, marking the location of rivets or other features of the chain and then moving the chain relative to the mark and see if it fits. Then note the distance bar tail to sprocket and see if the adjuster range is satisfactory.

 

[Franny K]

I read post quick and didn't see anything about it but from what I've heard still picco is "low profile" chain


-Efisher26-

Well sort of Oregon claims trademark rights to the term low profile. Stihl to play by the rules or of their choosing uses the term picco. A manual to a Stihl saw will have all the terms Stihl trademarks, copy writes or similar. Comparing 91vxl to 61pm or ps the cutting edge to bar sliding surface is a bit more for the Stihl. Perhaps a term exists, (reduced 3/8 ?) that is not trademarked at the rivet to sliding surface is less than "standard"3/8 pitch chain.

 

[SawTroll]

I read post quick and didn't see anything about it but from what I've heard Stihl picco is "low profile" chain


-Efisher26-

Yes, that hardly is a "secret".

Be aware that there are two basically different kinds of "low profile" chains out there. One (that this is not) only has lower cutters that take a smaller file, but has the "regular" chassis", and uses the "regular" sprockets (Oregon 33, 34, 35, 76 and 77 + Stihl Topic (TS and TM)). Most of these chain models have been discontinued, but they still are out there.

The second, and most common today, has a lower chassis and differently shaped drive tangs, as well as smaller and lower cutters, and uses different sprockets (drive and bar nose) from regular 3/8" chain. This is what usually are referred to as Picco/ lo-pro (but also is called "hobby" or "mini" by some brands.

 

[Finnrpm]

Video of rims pin count affect on dl count


This might be what SawTroll is writing about.....?

 

[Definitive Dave]

I just got my MS241 back from Mastermind and tested it out with the stock 6 tooth drum sprocket and 14" Stihl picco setup and it was nice.
All chains are brand new spun from rolls here in the shop.
I liked it better (all timed cuts in 11" x 11" aged dry pine cant) with a Stihl 12" picco bar and 50DL Oregon semichisel chain.
This 12" bar just barely cuts the 11" cant.
Next up I switched to 50DL of Stihl PS3 full chisel chain and I only gained 2/10th in the cant, which surprised me. I expected more.
Last test I could do with this bar was swapping to the 7 tooth rim sprocket setup. This was a pretty big gain.
In comparison to the earliest Oregon chain with 6 pin there is better than a full second of gain to the 7 pin / PS3 combination.

I will be modifying a short picco bar to allow me to run eight, nine, ten, eleven and twelve pin picco rims, though I will likely have to go to 55DL chain by the end of the run.
I also need to test PS (without the extra bumper of the PS3) and square ground picco.
Those would be impractical and dangerous for normal use and proper PPE should absolutely be worn.
At 10 pounds dry weight this is a fun little saw.
I ran a stock one and a Brad modified version at a GTG in Michigan and I was convinced this was a saw I needed to own.
Dave

6 tooth with PS3


7 tooth with PS3


Ported MS241 with 6 pin smoking a stock Husqvarna 395