Question before I destroy my carb
Thread Starter
Racer
Joined: Apr 2006
Posts: 340
Likes: 0
From: Warrensburg MO
Question before I destroy my carb
I need to replace the primary vacuum break on my QJET. It looks like two metal tangs are bent around the housing to hold it in place. Is there a trick to unbending these arms to remove the old housing?
Also, although it is called a choke pull off, I see no connection to choke operation. It looks like vacuum pulls the shaft in, which prevents the secondary air valves from opening. When you lose vacuum it looks like the shaft extends, and would allow the secondary air valves to open. Am I missing something here, or is it just symantics. I say tomato???
I have the divorced choke coil in the manifold. Thanks
Tommy
Also, although it is called a choke pull off, I see no connection to choke operation. It looks like vacuum pulls the shaft in, which prevents the secondary air valves from opening. When you lose vacuum it looks like the shaft extends, and would allow the secondary air valves to open. Am I missing something here, or is it just symantics. I say tomato???
I have the divorced choke coil in the manifold. Thanks
Tommy
Racer
Joined: Apr 2007
Posts: 361
Likes: 0
From: Sacramento (Citrus Heights) California
Bend them open gently with a flat screwdriver or a pair of pliers. They're very flexible, but don't move them anymore than you have to.
I've noticed that if the vac line to the pulloff is disconnected, then the choke "butterfly" on the primaries doesn't flutter open as readily, so it does have something to do with the primary choke, but you're right, it's mostly to allow the secondary choke plate to act as an air-valve.
At WOT your vacuum drops, which allows rod to extend, thus relieving pressure on the secondary choke plate. This allows the choke plate to open enough to allow air into the secondary venturis. Hence why the QJ is considered to be an "air valve."
I've noticed that if the vac line to the pulloff is disconnected, then the choke "butterfly" on the primaries doesn't flutter open as readily, so it does have something to do with the primary choke, but you're right, it's mostly to allow the secondary choke plate to act as an air-valve.
At WOT your vacuum drops, which allows rod to extend, thus relieving pressure on the secondary choke plate. This allows the choke plate to open enough to allow air into the secondary venturis. Hence why the QJ is considered to be an "air valve."
Thread Starter
Racer
Joined: Apr 2006
Posts: 340
Likes: 0
From: Warrensburg MO
Bend them open gently with a flat screwdriver or a pair of pliers. They're very flexible, but don't move them anymore than you have to.
I've noticed that if the vac line to the pulloff is disconnected, then the choke "butterfly" on the primaries doesn't flutter open as readily, so it does have something to do with the primary choke, but you're right, it's mostly to allow the secondary choke plate to act as an air-valve.
At WOT your vacuum drops, which allows rod to extend, thus relieving pressure on the secondary choke plate. This allows the choke plate to open enough to allow air into the secondary venturis. Hence why the QJ is considered to be an "air valve."
I've noticed that if the vac line to the pulloff is disconnected, then the choke "butterfly" on the primaries doesn't flutter open as readily, so it does have something to do with the primary choke, but you're right, it's mostly to allow the secondary choke plate to act as an air-valve.
At WOT your vacuum drops, which allows rod to extend, thus relieving pressure on the secondary choke plate. This allows the choke plate to open enough to allow air into the secondary venturis. Hence why the QJ is considered to be an "air valve."
