To see Carburetor Doctor's complete line of parts, pick a category below.
Carburetor kits consist of the normal wearing parts needed to restore like-new operation of the carburetor. These typically include gaskets, fuel inlet valve (needle/seat), accelerator pumps, check balls, clips, seals and instructions. Standard kits don't include floats, chokes or filters. These are available separately, or in master kits. Check the listings for the contents of each kit.
Made in USA.
Complete listings
Brass and Nitrophyl
The Carburetor Doctor carries a full line of floats for cars, trucks, tractors, marine and industrial application, in brass and nitrophyl. Floats control the fuel level in a carburetor. Symptoms of a bad float include flooding and fuel overflowing.
98% of our floats are US-made and all are ethanol-compatible.
Complete listings
Choke Thermostats
Automatic choke carburetors use choke thermostats, which are usually bimetal coil springs that open and close depending on temperature. Over time the springs can fatigue and no longer have the range of motion they originally had. This results in a choke that doesn't open fully, or doesn't close when the engine is cold.
Chokes that don't close fully lead to hard starting, and when they don't open fully, engines run too rich, which gives poor fuel economy, rough running and black smoke.
Carburetor Doctor has a full line of US-made hot air and electric choke thermostats.
Vacuum Breaks
Choke pull offs (also known as vacuum breaks) are diaphragms that crack open the choke plates slightly as soon as the engine starts. Symptoms of a bad choke pull off include running rough at start up, or hard starting.
On some 4 barrel carburetors, like the Rochester Quadrajet and Carter Thermoquad, the choke pull off also controls the opening of the secondary air valve, where it acts as a damper, preventing the air valve from opening too fast. A bad choke pull off can result in a bog on hard acceleration in these models.
Our choke pull offs are almost all US-made. None are made in China. We don't sell any of the cheap copies of Quadrajet pull offs that have flooded the market recently.
E-Book Service Manuals
Our kits come with printed instructions, settings and diagrams, but for more detailed service information we have comprehensive e-books in pdf format. E-book manuals have details on carburetor circuit operation, rebuilding, specs, service/rebuilding information and more.
When you purchase an e-book we send out an email with a download link. Once you download the manual, you can save it to your device and view or print pages as needed.
Hard Parts
In addition to regular rebuilding parts, we have hard parts like jets, solenoids, nozzles, springs and much more.
The most common parts we sell are listed below, but we have thousands more available. If you don't find what you're looking for, please contact us.
New Carburetors
Carburetor Doctor carries the full line of new Made-In-USA Zenith industrial carburetors, as well as premium quality reproduction replacement carburetors for many classic car and truck applications.