replacement o-ring help
 

i have two discontinued OS engines and i need the high speed AND low speed needle o-rings for both engines. they are the...

OS 40 FSR and
OS 45 FSR ABC.

i think they have the same carburator - OS item # 4BK

also, is there a source for the piston/cylinder assembly for the 45 FSR ABC?

RE: replacement o-ring help
 

High-speed needle o-ring:

OSMG7388 24981837 O-RING NDL FS/FX/LA $4.49

Low-speed o-ring:

OSMG7372 24881824 O-RING IV/PRC #6H $2.99

These parts can be ordered through any hobby retailer who sells O.S. Max engines and accessories.

RE: replacement o-ring help
 

thanx alot, bill. you may not have seen my final question about the 45 piston/cylinder since i added it after the original post. is there a source for this combo?

one last question. do you happen to have the bearing part numbers for these engines?

thanks!!

RE: replacement o-ring help
 

Sorry about the omission. We'd not know where you might be able to locate a piston/cylinder assembly for the O.S. Max .45 FSR. We certainly have not had any for a number of years, since it's been discontinued for so long. O.S. in Japan wouldn't have them, either.

Check the model magzines in their classified sections for dealers who sell to engine collectors. You may be able to locate parts there.