Fixable cylinder?

[Daserlon]

This cylinder came with the spare parts when i bought a husky 2100 last summer. The guys said he had a choke flap screw fall out once. I'm guessing this is the one it happened to. The gouge is on the exhaust side. The rest of it looks good.

 

[Frank bierce]

Ouch. Pretty big gouge there. I think that one may be a lost cause.

 

[drf256]

May be able to be ported and saved. Would need more pics.

These are rare birds, correct?

I'm only referencing ported because of the notch in the exhaust roof. Depending on how bad it is, the entire roof may be able to be raised until the damage ain't too bad on the slug.

The damage to the exhaust floor will cause some freeporting, but I've yet to see that make a Saw run terribly.

 

[Al Smith]

Nothing is impossible but that one would cost a kings ransom .

 

[Dub11]

What would happen if you over bored that could you rechrome it???? Diy 2100 big bore kit?

 

[mdavlee]

You could if you can find a piston in 58mm worth using.

 

[Dub11]

Iam confused by worth using? Is there a certain criteria when going to a bigger piston like window size? Or something else I have no idea about. And on having the cyclinder chromed would you have someone chrome it thick then honed to spec? I have a industrial chrome shop down the street from me thats literally there name and iam afraid if they went about chrome plating a cyclinder they would just drop the whole thing in.

 

[mdavlee]

Have to find one the right bore size, close enough crown to pin, skirt length, windows to match in this case, and of good quality. US chrome will plate that no problem and bore it 2mm if you send the piston with it.

 

[Dub11]

Got ya now and thanks for the info very much appreciated.

 

[Al Smith]

That's a pretty deep gouge 58 mm might not get it done .Wisco will make any piston you want but as I've heard in lots of a dozen pistons which would be expensive .Not to mention the machining fee and replating if you could find somebody to plate a blind ended cylinder .

 

[Dub11]

You might be on to something Ive heard those part are super rare

 

[Marshy]

I know the 2100 pistons are getting harder to find but you'd probably have a better chance of getting a usable replacement 2100 piston than one that would work that 2mm larger. I personally would try taking a 285CD cylinder and bore it to the 2100 bore and have it plated before going fully custom 2100 big bore kit.

 

[Daserlon]

Thanks for the info and ideas. I dont need this cylinder now but it would be good to have a spare. I've never big bored a saw before and i dont think i want my first to be a 2100. I've heard big bores are tempermental and wouldn't want to ruin/blow-up a running 2100. I'm still learning saws so my ability to keep it tuned and such isn't were it would need to be on a hotrod hard to find parts for saw. I'll put it next to my blue 266 top cover until i find something to do with it.

 

[Al Smith]

I have on one occasion sleeved a saw engine with a cast iron sleeve .However it was McCulloch 125 and the ports could be cut by going through the original ports because of the design .That was a 70 thou over bore making the sleeve thickness around 35 thou thickness .
In this case while I think possible the ports would have to be located with a port map template which is possible although very tedious .This is a project not measured in hours but rather days .

 

[Dub11]

I have on one occasion sleeved a saw engine with a cast iron sleeve .However it was McCulloch 125 and the ports could be cut by going through the original ports because of the design .That was a 70 thou over bore making the sleeve thickness around 35 thou thickness .
In this case while I think possible the ports would have to be located with a port map template which is possible although very tedious .This is a project not measured in hours but rather days .

Who made the sleeve for you?

 

[Al Smith]

I did.

 

[Dub11]

I did.

Nice what did you use for a base stock? Because my *pretty boy would go get some black pipe and hack it together.

 

[Al Smith]

Grade 50 fine gray cast iron .A 12" by 3" piece of stock from McMaster -Carr. BTW grade 50 cast is the same stuff Harley used for cylinders on flat head engines .In not certain what it was on the later knuckle heads,pan heads ,shovel heads .

I had thought of using "nodular" ductile iron which is what Ford used for decades on cast iron blocks .It's stronger but it doesn't machine as well .A "dry" sleeve really doesn't hold any pressure since it's just a liner .Not like a "wet " sleeve on a big diesel engine .

There's other options like pre heat 414o steel which is used on aircraft engines but again it doesn't machine as easily .

What McCulloch used on reed valve engines would be a great option but what it was I haven't a clue .