Do I really need acid (ms310)?

[Glenn RH]

Im ready to start rebuilding a ms310 cylinder. Now the acid part is worrying me as follows -

1. if a drip of acid runs down the exhaust port will it be a problem?
   
2. should I do some kind of cleaning before the acid?
   
3. will baking soda and water neutralize any acid I apply it to?

after the acid treatment Ill hone it lightly
note: the contrast of the following photo has been exagerated(photoshopped) to make it easier to view ,by my eyes alone the cylinder looks ok

View attachment 50075​

As always your feedback is invaluable and appreciated

 

[Four Paws]

Well, muriatic acid is nothing to be scared of. Looking at your cylinder, it sure doesn't look too bad. Looks as if the saw has been run really rich most of its life. A hone should clean it up, but using acid just means you need to hone for a shorter ammount of time...in my opinion, that is a good thing.

Check out THIS thread for more info on cylinder repair. Let us know if you have anymore detailed questions.

Josh

 

[Crofter]

EasyOff oven cleaner is worth a try. It is still mean stuff but not quite as agressive as muriatic.

 

[Dan Forsh]

http://ptcl.chem.ox.ac.uk/MSDS/HY/hydrochloric_acid.html

msds sheet

 

[Lakeside53]

If you use acid definitely clean first; the oil in the bore stops the acid from being effective.

I clean with 4:1 diluted purple cleaner first, then after acid dunk it back into the cleaner to neutralize any acid left.

 

[Glenn RH]

quest for purple cleaner

ok ill look for purple cleaner - Home depot here I come

 

[Lakeside53]

Autoparts stores is where I find it around here. Castrol Super Clean is the non-generic name.

 

[drmiller100]

don't be afraid of the acid.

clean with warm soapy water.

pour some acid in a small container, like a plastic pop bottle top.

dab acid onto the cylinder with a q-tip. let it sit 30 minutes, repeat until no fizzies.

clean with lots of warm soapy water, and rinse generously with water.

 

[oldsaw]

Dude, like, be careful with the acid man. It's like, too much acid can be like a bad trip, maaan. But, wow maaan, the colors, orange and orange, and white, and red, and orange, and even blue....wow. (Think Tommy Chong)

Mark :hmm3grin2orange:

 

[nytreeman]

Dude, like, be careful with the acid man. It's like, too much acid can be like a bad trip, maaan.

but the cylinder is like soooooo shiny now maaan! :crazy1:

 

[Glenn RH]

generic purple ???

this is what i found - Purple Power (next to the Simple Green)

View attachment 50096​

 

[Glenn RH]

purple at work

cylinder before purple View attachment 50102

cylinder after purple View attachment 50103

by the way i might as well ask now, best way to remove that orange silicone-like stuff without scratching surface

 

[Glenn RH]

after acid

did 2 acid washes, doesnt seem to be bubbling any more, washed again with purple, air gun and heat gun to dry it

hot stuff View attachment 50105

exhaustside after acid wash (still stained but i think all aluminum is gone)

View attachment 50106​

need to find a pipe to break in new hone

 

[dtnodya]

this is what i found - Purple Power (next to the Simple Green)

View attachment 50096​

That'll work fine ... simple green would work also (maybe better even). To remove the 'orange silicone-like stuff' without scratching, you can use a scotchbrite pad or somethin' like steel wool.

 

[andrethegiant70]

Nice post, thanks for the pictures... did you pick up the special ring compressor for that series (ms290/ms310/ms390)? I didn't and it was a tough go on my 290.

 

[Glenn RH]

movin along

getting ready to hone View attachment 50181

honeing away View attachment 50182

crosshatch (closer to 33degrees than 45 degress) View attachment 50184

final cleaning (including that damn dirko ) View attachment 50183

There must be a better way to remove dirko

 

[Lakeside53]

There is - Dirko comes off real easy with a medium scotch pad on an air die grinder.