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Weber 40 DCOE Carbs

Posted: Sat May 24, 2014 1:33 pm
by beemergb
Hi there ,which model Weber 40 DCOE do I use on the Mk1 Zeyphr 6 engined Saber with the Raymond Mays head ? Any help would be welcome thank Harry

Re: Weber 40 DCOE Carbs

Posted: Sat May 24, 2014 1:39 pm
by Nick
I thought all 40 DCOE webers were interchangeable - chokes/jets etc would need to suit the application.

Dellorto DHLA 40 should also be interchangeable.

Re: Weber 40 DCOE Carbs

Posted: Sat May 02, 2015 9:43 pm
by Old and Slow
Hope this info is still useful, only a year late!!
My Six has two 40DCOE18 and one 40DCOE31 fitted!!
The accelerator pump rod length is the difference, but these can be changed, so I assume (but I haven't investigated this yet!) whoever fitted the carbs changed the rods so they are all the same. I've checked the progression holes and these are the same in both carbs, so the bodies are (in principle) interchangeable.
Then of course you'll need to get the appropriate jets etc.
Good luck.
Philip

Weber 40 DCOE Carbs

Posted: Wed Jul 11, 2018 6:12 pm
by Old and Slow
I refurbished the triple webers (new gaskets etc) earlier this year and it seemed to be running rich on the Idle jets:
Here's a picture of the new Idle Jet screws (lower) compared with the originals:
Idle_screw.jpg
Screwed up
Idle_screw.jpg (87.31 KiB) Viewed 266 times
I think the new screws taper too finely and don't close off properly. I've put the old ones back in and it seems to be running better (of course it could all be in the mind!)