I was at a gas station looking at my engine when a guy walks up and looks at the carb and says " It looks like you have some hoses missing and a couple of ports blocked that maybe should have hoses going too them." The instructions that came with the carb were confusing, and maybe I did it wrong.

Anybody know of a picture and instructions that tell you what really needs to be hooked up and plugged properly? This would explain why I can't get the smooth idle I want or quite the power I expected.

There should be exactly one vacuum hose on your intake (and it actually isn't on the weber itself) running from the port on the outside face of the intake manifold below the carburetor itself to the vacuum advance port on the distributor.  All other vacuum ports should be blocked.

You should double-check to make sure that the unused ports are, indeed seald off.\

Also, if you are using an electric fuel pump (low pressure), you should install a good regulator and set it to around 1 pound.

There are a couple of good links at Ack's FAQ (see link in signature) about care and feed of the Weber 32/36.  Do a search for weber to find them.  One, at iZook.com, describes the proper procedure for setting one up.

Finally, double-check your timing with a timing light to make sure that you are 8 degrees BTC at idle..

hope this helps!

There should be exactly one vacuum hose on your intake (and it actually isn't on the weber itself) running from the port on the outside face of the intake manifold below the carburetor itself to the vacuum advance port on the distributor.  All other vacuum ports should be blocked.

Hey Ack,

You sure this is right? I believe there is an appropriate vacuum advance port on the 32/36 Weber. If one was to hook the vacuum advance up to the manifold the timing advance would be backwards. Full throttle = less vacuum = less advance. Idle = high vacuum = hi advance. Right?

Also, the newer Webers have a hose coming off of the float bowl now that can be plugged into the charcoal cannister.

HTH, -Eric

Thanks, I will look at all this and see. It seems that the timing is supposed to be 15 btdc or so I was told. I am around 1900 feet above sea level. As far as the carb, it is the 34 they came out with in the last year or two. not sure how it differs from the 32 36 but you guys gave me some good info to look at. I don't remember the instructions that came with it saying anything about utilizing the charcoal cannister. I think I still have all that stuff in case it needs it back.

I will look at it this evening. Adam

I went and examined my carb, It is similar yet different then the 32 36. I don't see any ports coming out of it. There are a couple things that have brass plugs going into them and a couple brass nuts or screws that may be ports but I hate to mess with them. Surely the vacuum advance goes to something. But what. If I put the charcoal cannister back in, what could hook too it if there isn't a port on the carb. I do seem to always smell a little gas in the cab. Of course I could maybe put the missing firewall plugs in. (Duh!)

Hey Ack,

You sure this is right? I believe there is an appropriate vacuum advance port on the 32/36 Weber. If one was to hook the vacuum advance up to the manifold the timing advance would be backwards. Full throttle = less vacuum = less advance. Idle = high vacuum = hi advance. Right?

Also, the newer Webers have a hose coming off of the float bowl now that can be plugged into the charcoal cannister.

HTH, -Eric

You are correct, Eric!

Instead of trying to remember, I should have consulted the Weber install document (|removethispart|@ you-know-where) where it, indeed, says the vacuum advance connection is on the 32/36 carburetor. 

My bad...

Haven't seen the newer versions but I kinda wish I had one so I had a working return circuit on my fuel line...

I do have 2 whole top halves to the 34. one has damage to the casting and the other had to have the linkage to the choke reassembled due to a lost nut. I can't remember if the broke casting one is complete or not. Both have the choke mechanism complete. Low miles on the setup too. Let me know if you're interested. Adam

I looked closer and I see that I do have the hose from a port in the carb connected to the vacuum advance. I see no other ports on the carb to connect to anything. Maybe the vacuum advance is bad?   

Is there a way of checking the vacuum advance? How do you know if the vacuum advance mechanism is bad?

I suppose I can also change the plugs and wires. I can't remember whether or not I did it already since the 15 months I've owned it. I had a couple others I was having to maintain and seem to have lost track.

My biggest complaints about this carb is the poor milage and it's guttlesness going over 50. It feels like I'm driving into a stiff head wind. It's responsive when I take off and all the way thru 3rd. 4th gear is ok. 5 th gear with out down hill assistance, Forget it. I expected alot more out of this carb and would like to think  that it is a tuning issue.