ABC or ringed?
 

I bought another OS .61 SF, no box though. how do i tell if it's an abc vs ringed?

david

RE: ABC or ringed?
 

look inside the exaust port; if you see a small band around the top of the piston about 1/16 in thick, that is the ring. If you see the same material top to bottom of the piston it is ABC.

RE: ABC or ringed?
 

The ABC engine also has a line at the top edge of the piston but the ringed engine band is wider.

RE: ABC or ringed?
 

i'll take a look.

RE: ABC or ringed?
 

If it's ringed, and you need to get a new one, you can get it, shipping included, for $13 from:

Frank Bowman

1211 N Allen Ave. Farmington, N.M. 87401-3568

505-327-0696

ringmaster46 ~ at ~ msn.com

Finding a new ABC liner/piston set will be time consuming and pricey.[:o]

David

RE: ABC or ringed?
 

either way it is in almost new condition. it came with a nice balanced spinner and 2 mufflers. not bad for $80.

david

RE: ABC or ringed?
 

it appears to be ringed. the 'band' or ring at the top is about 1/16" thick.

david

RE: ABC or ringed?
 

I took some photos in case anyone reading this thread wants to see the difference.

The left photo is ringed, and the right one is ABN

David

RE: ABC or ringed?
 

thanks david. my understanding of everyone's description was correct. the sf is ringed. i know now that a couple of rf's i have are ABC. i bought them not knowing.

david