Another Weber question

Steve Meltzer · Post by **Steve Meltzer** » Sun Sep 23, 2007 10:28 pm

While trying to dial in the final curb idle on my 330 GTC (40DCZ Webers) I noted that the throttle valve/plate on the left, #3 carb doesn't open when you blip the throttle. Can only be moved with a long screwdriver. Not sure why, but seems like it's bound up. Think I might be able to tell anything with the top pulled from the carb? It is recalcitrant under all conditions and it takes some pressure to open it. The butterfly on the opposite side of #3 seems to move correctly. Any ideas other than Pierce? thanx s

Post by **tyang** » Sun Sep 23, 2007 10:40 pm

Hi Steve,

I'm not an expert on carbs, but there is a gear drive that connects the two throttle shafts. Is the locking nut tight on the stuck shaft? Taking off the top plate will only reveal the float assembly. The side plate covers the gear drive to the throttle shafts.

Tom

Rudy van Daalen Wetters · Sun Sep 23, 2007 11:01 pm

Steve,

I believe that Tom is referring to the locking bolt (figure number 42) on the weber carb diagram for the GTC in your book. If that is not locked, the gear and shaft would not respond input from the master gear (figure 35) which is held on by a pin to its throttle shaft.

Keep us posted.

Rudy van Daalen Wetters
1963 GTE s/n 4001
1966 330 GT s/n 8705

Steve Meltzer · Post by **Steve Meltzer** » Mon Sep 24, 2007 12:05 am

I'll check on this in a day or two, when I get my chance. thanx again for continuing my education...which is certainly defecient. s