Brodhead Pietenpol Association

Original Posted By: "John Carmen"
Hi group. I have an A-65 Cont. I'm doing a top on. Is there some secret recipefor getting the carbon off the piston and the chamber? I'm afraid of scratchingthem. I've tried Marvel Mystery Oil, but it doesn't seem to do anything. Itwas a suggestion from an A&P.Anybody know anything that works? I'm trying to get my Flybaby back in the airso I can go back to Peit building.Thanks groupGeorge AllenHarrisburg, PAGeorgeA(at)PAonline.com(Peitenpol builder)________________________________________________________________________________

Original Posted By: "George Allen"
try gun cleaning solvent, I used it and it works, don't let it soak to longor might eat aluminum.----- Original Message -----

Original Posted By: "George Allen"
Methylene Chloride paint stripper but use caution out side for goodventilation as the fumes are toxic. You can also take to an auto enginerebuild and they have a tank which will take it off.Cy Galley - MVR-AACA www.aaca.org/mvr----- Original Message -----

Original Posted By: "George Allen"
George, We ultralight flyers have to decarbon our 2 stroke engines and we useeither a wedge of hardwood or a piece of aluminum about 1/8" thick that issharpened like a chisel. You still have to be careful.Wayne McIntosh Lafayette IN----- Original Message -----

Original Posted By: owner-pietenpol-list-server(at)matronics.com
George,A gallon or three cans of carb cleaner does the trick for me. The chem toolkind that you soak the part in. It is chromic acid along with some otherstuff adn it pulls off the carbon in minutes.They sell a 1 gal paint style can that has a little basket in it. I wouldNOT buy that one. Instead, get a few 1 gallon cans that looks like a paintthinner can of chemtool. Find a metal pail of some sort that has a sealablelid and use that. I have about three gallons of chemtool in a 5 gallonmetal paint can like the type that driveway sealer comes in. You can buythese can new at paint stores. They have a sealable lid. A metal basket isnice but not necessary. You can make one out of a metal kitchen strainer.This is nasty stuff and you need rubber gloves and eye protection.I get the gallon cans of chemtool at the local Checker Auto parts store forabout 13 dollars a gallon. If your store stocks chemtool products they canorder it for you.They also sell a 5 gallon pail with a basket and three gallon already in itbut it might cost upwards of 75 bucks. It is cheaper to cobble it together.They used to sell the 5 gallon pail at Sam's Wholesale Club but I have notseen it there for about 6 or so years. It was about 60 dollars at the time.chris bobka-----Original Message-----

Original Posted By: Isablcorky(at)aol.com
Great ideas. I figured there would be more then one answer.Thanks guys. I'll try till it works.George AllenHarrisburg, PAGeorgeA(at)PAonline.com(Peitenpol builder)----- Original Message ----- 1>try gun cleaning solvent2>Methylene Chloride paint stripper3>either a wedge of hardwood or a piece of aluminum about 1/8"4>It is chromic acid along with some other >stuff adn it pulls off the carbon in minutes.________________________________________________________________________________

Original Posted By: "John Carmen"
Subject: Re: Pietenpol-List: Carbon buildupIn a message dated 4/18/03 7:35:23 PM Eastern Daylight Time, GeorgeA(at)paonline.com writes:> Hi group. I have an A-65 Cont. I'm doing a top on. Is there some secret > recipe for getting the carbon off the piston and the chamber? I'm afraid of > scratching them. I've tried Marvel Mystery Oil, but it doesn't seem to do > anything. It was a suggestion from an A&PUsing a 3M type scratch pad (non-metalic) would work. Long as you don't create any deep scratches.________________________________________________________________________________