New O-rings for old carbs  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> New O-rings for old carbs
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New O-rings for old carbs - 5/4/2008 9:31:25 PM   
buzzard bait


 

Posts: 981
Joined: 1/1/2003
From: Ithaca, NY, USA
Status: offline 		Does anyone know where to get o-rings for old engines? I have a Thunder Tiger 25 Pro in need of an o-ring for the carb/crankcase juncture. I know that the I.D. for the o-ring needs to be 3/8 inch. I'm sure lots of engines have been made with carbs that size, so I don't think I necessarily need a TT source. But searches on RCU, Google and Tower Hobbies have not nelped me solve the problem.

There are many generic o-ring outlets, but the thinnest rings seem to be 1/16. It might be OK, but I think the carb rings are usually thinner than that. There is no "stepped" area around the hole for the carb, so maybe it doesn't matter. In fact, the two surfaces are quite flat, so maybe just some RTV would do?

Thanks,

Jim
       Post #: 1

RE: New O-rings for old carbs - 5/4/2008 11:43:14 PM   
rainedave



Posts: 4703
Joined: 7/21/2005
From: Greensboro, NC, USA
Status: offline 		Hi Jim. I just went to my local hardware store and bought several of each size they had. I try different ones until I get the best fit.

David

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(in reply to buzzard bait)
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RE: New O-rings for old carbs - 5/5/2008 12:03:37 AM   
buzzard bait


 

Posts: 981
Joined: 1/1/2003
From: Ithaca, NY, USA
Status: offline 		OK, thanks David, I'll see what I can find. Jim

(in reply to rainedave)
       Post #: 3

RE: New O-rings for old carbs - 5/5/2008 7:51:10 PM   
stg61abc


 

Posts: 155
Joined: 4/19/2005
From: Catuaba do Sul SP, BRAZIL
Status: offline 		Hi Jim, the best way is the way indicated by Rainedave. But if you cant get the new o-rings, i know an alternative. Try a rubber grip from and old pen, that some pens have. This grips can be cut in a variety widths, and serves very well as goods carbs o-rings. Just use a good scisor and nice flying!!
cheers

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< Message edited by stg61abc -- 5/5/2008 7:59:40 PM >

(in reply to buzzard bait)
       Post #: 4

RE: New O-rings for old carbs - 5/6/2008 1:40:36 AM   
buzzard bait


 

Posts: 981
Joined: 1/1/2003
From: Ithaca, NY, USA
Status: offline 		Ha! Model builders are such a resourceful lot.

Really, it's hard to throw anything away without stopping first to ponder whether it has some, ahh, use...

That's one of many I hadn't thought of.

Thanks guys,

Jim

(in reply to stg61abc)
       Post #: 5

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