1970 Rochester Two-Jet

[Ethan1]

 I have a Rochester Two-Jet. Part number 7040436. I notice there is a plug on the air horn and what looks to be an APT system right by the power valve. Is it an adjustable part throttle?

 Thanks!

[Cliff Ruggles]

Can you post a pic of it......Cliff

[Ethan1]

Can you post a pic of it......Cliff

 I took a look again and that plug is not over this screw by the power valve, so I didn't take a pic of the plug. The plug is right near the accelerator pump.

 Here is a pic of that screw by the power valve.

 

 

[Cliff Ruggles]

"Screw by the power valve".  I see a cup with a feed hole leading down to the APT screw.  This was used on some late model 2GC units.   Here is some good reading on it, with pics:

http://books.google.com/books?id=DwUMAaiyMoYC&pg=PA154&lpg=PA154&dq=Rochester+2GC+apt+system&source=bl&ots=02Uo1coIuw&sig=IPslXBqghHTnrTdWSVtCBPuRQmY&hl=en&sa=X&ei=8i_0T53XD8na2wWJ09TEBg&ved=0CEoQ6AEwAg#v=onepage&q=Rochester%202GC%20apt%20system&f=false

[Ethan1]

"Screw by the power valve".  I see a cup with a feed hole leading down to the APT screw.  This was used on some late model 2GC units.   Here is some good reading on it, with pics:

http://books.google.com/books?id=DwUMAaiyMoYC&pg=PA154&lpg=PA154&dq=Rochester+2GC+apt+system&source=bl&ots=02Uo1coIuw&sig=IPslXBqghHTnrTdWSVtCBPuRQmY&hl=en&sa=X&ei=8i_0T53XD8na2wWJ09TEBg&ved=0CEoQ6AEwAg#v=onepage&q=Rochester%202GC%20apt%20system&f=false

 Thank you, Cliff. Sorry, didn't know what else to call it.