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+--- Thread: Still problems with 26VA (/showthread.php?tid=9059)
Still problems with 26VA - Tiger - 18-12-2023
Found a picture showing a screw over CAPACITY WELL
My carb is missing this screw
Could this affect the cold start ?
Any idea of the type of screw required
RE: Still problems with 26VA - John Cornforth - 18-12-2023
Hi
The capacity well affects middle to high speeds, I don't think it will have any appreciable effect on cold starting. I have a feeling that some versions of the 26VA used a cast-in orifice rather than a separate jet, probably a cost saving measure.
Cold start relies on a tight fit of the choke flap so that you get enough suction on the jets even with the feeble airflow at cranking speeds.
RE: Still problems with 26VA - Tiger - 18-12-2023
Thank John for a quick reply
I do have some play in the butterflie spindle which may be causing a problem
Choke flat is a good deal
RE: Still problems with 26VA - stuartu - 18-12-2023
John is quite correct.
Have a look at your float chamber and your illustration. If a brass affair is screwed into hole 3 you probably have the right arrangement. If there is no brass insert but the hole has a visible thread the vital component is missing. If there is a hole with no thread (by design - a stripped thread is not good!) then you have the version with the cast in, pre set dimension, so also ok.
As John says, a missing brass thingummy will result in a flat spot in transition between jets 1 & 2.
Hope this helps,
Regards,
Stuart