Husqvarna 2100 piston questions

[Mr.Moose]

I have a few of these old beasts and love them. After looking through my parts cabinet i realized i have just about enough to make another one.
It seems there are some variations with the ring pin locations... The particular jug im using has a casting number of 833/2a and when i took it apart had a husky piston fitted in it with the ring pins on the front. A piece of the piston crown broke off and fortunately didnt harm the jug whatsoever.
I bought a new GOLF piston and it is setup the same way with the ring pins on the exh side, problem is when in the cylinder i can just about see the end gap of the rings on both sides (i assume thats what broke the crown on the oem piston) Before anyone asks, jug is bone stock and not ported.
I flipped it around and the end gaps seem to be nestled perfectly in between the intake and transfer windows. Should i just flip it around and ignore the arrow on top?? Or does anyone have any good reviews on another aftermarket piston with better pin locations? As it is im not all too thrilled about this piston, gonna need a bunch of cleanup around the windows from a poor cast.
Golf on the left OEM on the right
<a href="http://s1312.photobucket.com/albums/t531/huskysaws/?action=view&current=174ECDD9-670F-441C-A3F4-47663151AD39-10457-00000A5EDD447E09_zpsc0e4b18f.jpg" target="_blank"><img src="http://i1312.photobucket.com/albums/t531/huskysaws/174ECDD9-670F-441C-A3F4-47663151AD39-10457-00000A5EDD447E09_zpsc0e4b18f.jpg" border="0" alt="Photobucket Pictures, Images and Photos" /></a>

You can just about see the ring pin in the corner
<a href="http://s1312.photobucket.com/albums/t531/huskysaws/?action=view&current=917A7AD7-D868-4D58-915D-27F263C87772-10457-00000A5F4AC094B5_zpsc0c4c2a7.jpg" target="_blank"><img src="http://i1312.photobucket.com/albums/t531/huskysaws/917A7AD7-D868-4D58-915D-27F263C87772-10457-00000A5F4AC094B5_zpsc0c4c2a7.jpg" border="0" alt="Photobucket Pictures, Images and Photos" /></a>

 

[nmurph]

I would think the arrow is on the wrong side. 7YO kids aren't usually the best at getting details correct. Some 2 stroke apps have the pin on the front, and I don't know about the 2100, but from what you say, I think you need to put the locating pin on back and let it ride bw the ports.

 

[dozerdan]

murph is correct. The ring end gaps should be on the intake side on a 2100..

Later
Dan

 

[Mr.Moose]

murph is correct. The ring end gaps should be on the intake side on a 2100..

Later
Dan

Yes the end pins generally are on the intake side BUT the 2100 i know had both versions. I have 2 oem husky pistons with the arrows pointing to the pins sitting on my bench, i believe this was done later on in production for some reason, im sure theres a 2100 buff on here with some service bulletins i hope that can shed some light on the subject.
Ive had a 2100 that i sold a year ago that i bought a new oem thin ring setup for that had the pins located on the intake side, so i know theres different types.

 

[husq2100]

I dont have my papers in front of me, but there were at least 4 pistons OEM in the 2100, the very first type in early saws, then the same shape as pictured in this thread, and as Moose said the pins were moved at some point (same piston otherwise) an of coarse the thin ring version.....oh and #5, the last 2101 piston which is more of a stock non full circle skirt like the 288xp etc

 

[pioneerguy600]

If you are planning on running two rings be sure to check that both ring end pins run between the ports.

 

[Mr.Moose]

My biggest question is this: are these pistons balanced in a way where if i were to flip it around could it self destruct? The LAST thing i wanna be doing is destroying one of my minty jugs.

 

[pioneerguy600]

My biggest question is this: are these pistons balanced in a way where if i were to flip it around could it self destruct? The LAST thing i wanna be doing is destroying one of my minty jugs.

No, they can be run either way, the arrow usually denotes that it should be installed ffacing the exhaust but its real function is to orientate the ring pins.

 

[Mr.Moose]

If you are planning on running two rings be sure to check that both ring end pins run between the ports.

Aside from less wear, is there any bonus to only running one ring?

 

[Motorsen]

Less friction

You will have less friction runnig one ring only. But as with everything else it's a trade off of various parameters. You will have a trade off in heat transfer area (piston to cylinder). Less compression (at least at low rpms). Maybe not measureable with a new piston in a new cylinder. And some other factors. I would not run one ring only in a worksaw of that size. I think it's a racing option.

Motorsen

 

[turtle561]

i think mr. moose is asking if the wrist pin is off set. if so ,will turning it to get the ring ends between ports create and out of balance that will harm the engine ?
i too would like to know if the wrist pin is offset on the 2100.
what other saws use this design feature? what is the purpose of offsetting the wrist pin ?

 

[Mr.Moose]

i think mr. moose is asking if the wrist pin is off set. if so ,will turning it to get the ring ends between ports create and out of balance that will harm the engine ?
i too would like to know if the wrist pin is offset on the 2100.
what other saws use this design feature? what is the purpose of offsetting the wrist pin ?

Yes that is where i was going with that question.
I dont have a problem with buying a different aftermarket piston if someone knows of one that is setup with the pins in the rear and is decent quality...an oem setup with rear pins would be nice if i can locate one. As stated before, i have no interest in harming my jug!

 

[pioneerguy600]

Wrist pins are not offset in any chainsaw pistons that I know of. In the 2100, 394 and Jonsered 2094 I have swapped these pistons because the 2100 has a wider skirt width and allows the intake and exhaust ports to be widened considerably more than the stock 394 and 2094 pistons would allow.

 

[ImQuattro]

digging up an old thread because I'm helping a guy out with a blown up 2101. Needs a crank and P & C.
The cylinders are salty IF you can come by them. Are there any other options? I've seen big bore kits for the 394xp (excuse my ignorance if there isn't any interchangeability), but I also see the XP's crank is 2mm shorter in stroke. Is it possible to swap out the crank and then use the bbc on the 2101?
I have access to a 2100 crank & piston, the jug is the sticking point as this guy's budget is tight and this is a sentimental saw.
Thanks!

 

[Rx7man]

I'd look for a crunched 2100 to pillage the parts from if at all possible.

 

[mdavlee]

Have it re plated is going to be about $200.