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Aug 13, 2019, 10:33 PM
Registered User
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Adapting carbs to 1/2A, and other small engines

I previously posted a few pics of my modified Cox TeeDee .09 where I fitted a P.A.W. 1.49cc diesel to the .09 cylinder and I also showed an Enya .09 carb fitting neatly into the carb barrel. Problem is securely fitting the carb. My first inclination for this .09 and other small engines with small intakes is to JBWeld a brass tube onto the intake with an ID that will accommodate the carb neck, then use the set screws. Any ideas or experiences on how to do this properly, without a lot of machine work? I have drilled out minute amounts on intakes before, but this .09 doesn't have much of an intake length to work with. Thanks.
Last edited by Ultracon; Aug 13, 2019 at 10:40 PM.
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Aug 14, 2019, 12:08 AM
Nitro User
1/2A Nut's Avatar
I like cutting threads into the carb neck and using a thin lock nut.
I oil the threads to help seal the assembly. The plastic carb body'
is never my go to I buy aluminum carb bodies for these conversions.
Here are some of my efforts. Last pic is the parts I used for a TD .15

Aug 14, 2019, 01:27 AM
Registered User
Thread OP
Very nice! What carb is that?
Aug 14, 2019, 03:22 AM
Nitro User
1/2A Nut's Avatar
You can buy these new from Norvel a .15 size carb more info in my speed thread.
I also have info about how to install a G-Mark .030 RC carb to a TD .020 with a
aluminum carb body, it requires drilling out the threads in the aluminum carb smooth. Has worked very well with many engine runs to date.

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