OS Carburetor O-ring source
 

Hello,

Anyone know where I can get O-ring sets for these OS carbs.....models 74 and 4B?

Thanks in advance,

Scott

RE: OS Carburetor O-ring source
 

Scott,
Any outlet that has OS parts (IE Tower Hobbies) has them for 2.99 or 3.99 per pair, depending on which part number you buy them under. These are 3mm ID by 6mm OD O-rings.
They also fit Magnum, Thunder Tiger, Leo, Megatech, some Mecoa, most Perry Carb Idle discs, and many others. If You're in this hobby for any length of time you will either buy quite a few of these or have engines that have some strange mixture problems. The long term cure is to buy in bulk. McMaster Carr carries them for about $4.50 per 100. They have them in 2 materials. Make you get the "Buna N" type, as the other material is not compatable with methanol. Just go to [link=http://www.mcmaster.com]McMaster.com[/link] and search on Orings. While you're there get some for carb necks. They have cap screws in bulk for about 10% of what we are used to paying.

Bob Hinze

AMA 2276

RE: OS Carburetor O-ring source
 

Thanks for the info Bob!

Scott