Weber 38DGAS Idle Jet Different

[amdavidson]

I started to rebuild my weber 38/38 today with new jets and pulled out the idle jets to replace them and found that they were two different jets.

The one on the left is matches the exploded view and the jets I bought based on the parts list online.

The one on the right came out of nowhere.

Does this look right to anyone? Are there different versions of the 38DGAS that have different idle jets?

Thanks gurus!

[amdavidson]

FYI for anyone who wonders this in the future.

My Haynes Weber manual shows the same jets on both sides, but this redline page says that the early carbs had matched idle jets and holders.

The later carbs had different jets on the choke and inlet sides.

Here are the part numbers for everyone's reference:

74409-xxx Idle Jet (choke side)

74403-xxx Idle Jet (Inlet Side)

[TobyB]

huh-

the 32/36 was often (but not always) done that way so that you could have an idle cutoff solenoid.

Many have different holders, but the jets are interchangable

My (10 year old) 38/38 is symmetrical.

Can you swap the jets in the holders, or are they dimensionally unique?

t

[amdavidson]

The jets and holders are both different.

You cant swap the jets in the holders, and you cant swap the holders on the sides.