Topic: Autolite 4300 Carburetor C9ZF-F

[QKSLVER]

I am looking for a restored Autolite 4300 carburetor, C9ZF-F, for a 1969 Mustang 390 Mach 1 with an automatic transmission.  Given the fact these aren't as popular as the Holley counterparts, does anyone have a recommendation on the best place to find one?  Most of the vendors I see selling restored carburetors only seem to carry the Holley.  Thank you in advance for your assistance.

[Bob Gaines]

I am looking for a restored Autolite 4300 carburetor, C9ZF-F, for a 1969 Mustang 390 Mach 1 with an automatic transmission.  Given the fact these aren't as popular as the Holley counterparts, does anyone have a recommendation on the best place to find one?  Most of the vendors I see selling restored carburetors only seem to carry the Holley.  Thank you in advance for your assistance.

Of course you can wait around and hope a restored one shows up. Since that carb is not in high demand most that restore and sell will not put the time and money into it to sit on a shelf. Your best chance is to find one used and have it restored. best of luck on your search.

[RoyceP]

I am looking for a restored Autolite 4300 carburetor, C9ZF-F, for a 1969 Mustang 390 Mach 1 with an automatic transmission.  Given the fact these aren't as popular as the Holley counterparts, does anyone have a recommendation on the best place to find one?  Most of the vendors I see selling restored carburetors only seem to carry the Holley.  Thank you in advance for your assistance.

Here's one: [size=78%]https://www.ebay.com/itm/155746695682?itmmeta=01HW91JHRQT7D3TEJD3CGPV5YE&hash=item244339fa02:g:7DUAAOSwXN5e6VU7&itmprp=enc%3AAQAJAAAA8PYTR7lVD7j9F4dlKHwdlxwrBxF%2FxXSwukdOixp5vn%2Bypo2FTp2NIfcQFYi2ijuCMJVc9yd8dbghTBGjiUxbh9%2B76NHbb6et%2BN8MvSRvLRrT3L5Mv%2B0S72y0RnzHwGQImngpoKO9Ja8CJMZUAuzxCy2KcGWAZUWMTuRlg2rY9wVojg8U1R5%2FLuRe%2FGPzCBU5EcXJGlT0xhwOXj%2BN1dSgEoiPSvCkdGpRnZa0wwNO4nQUfmv9l6aLJkSO2n%2FAgVonx8xaDf6GGMjGWkDjGozLoG0NwAIHOYhdh3E8%2FTB42Rifmv4MdXgjRfFdYThyKSATHw%3D%3D%7Ctkp%3ABFBMvJzKoeJj[/size]

[Bob Gaines]

For some reason carb rebuilders have a hard problem getting 4300's to run right. At least from mine and just about everyone I know experience. If anyone has FIRST hand experience with someone who can rebuild a 4300 and make it run properly there are a lot of us out here that would like to know . Many say that they can but when you get the pretty restored carb it doesn't run right or runs ok for a week and then goes to s#!t.  Many enthusiasts just give up trying to get one to run right and run a Holley.

[jwc66k]

For some reason carb rebuilders have a hard problem getting 4300's to run right. At least from mine and just about everyone I know experience. If anyone has FIRST hand experience with someone who can rebuild a 4300 and make it run properly there are a lot of us out here that would like to know . Many say that they can but when you get the pretty restored carb it doesn't run right or runs ok for a week and then goes to s#!t.  Many enthusiasts just give up trying to get one to run right and run a Holley.

Ain't that the truth. I took me over 10 years to get these Webers to run right on my VW engine. The experience got this one offf a 66 done in a day. See attached.

Of course you can wait around and hope a restored one shows up. Since that carb is not in high demand most that restore and sell will not put the time and money into it to sit on a shelf. Your best chance is to find one used and have it restored. best of luck on your search.

If you do get the one you need and it does need a rebuild, scratch some "code" on the underside as an ID and take a picture of it. A couple of members of my Mustang club sent their carbs out to get rebuilt only to get something else backJim

[CharlesTurner]

For some reason carb rebuilders have a hard problem getting 4300's to run right. At least from mine and just about everyone I know experience. If anyone has FIRST hand experience with someone who can rebuild a 4300 and make it run properly there are a lot of us out here that would like to know . Many say that they can but when you get the pretty restored carb it doesn't run right or runs ok for a week and then goes to s#!t.  Many enthusiasts just give up trying to get one to run right and run a Holley.

Truth.  They are a serious pain, I'm dealing with one now, can't say how many times I've had it apart now.  One mod is to install a secondary needle block off plug which seems to help with common flooding issues.  They are fairly simple carbs as far as the number of parts/pieces that get replaced during a rebuild.  It seems they are quite sensitive to fuel pressure also.