fuel screw o-ring or washer first

[yamaharichey]

Ordered new fuel screws with spring, washer & o-ring. Exploded view of BS 34 carbs show the washer at the bottom, but Mikes XS says the o-ring goes underneath the washer. The old ones had the o-ring at the bottom. So starting at the top is it spring, washer then o-ring at the bottom?

 

[5twins]

Yes, you want the washer in between the spring and o-ring so the spring doesn't chew the o-ring all up, assemble like so .....

I'm not sure what diagram you were looking at. The BS34 diagrams I've seen don't show the mix screw at all, probably because it was capped over with a brass plug from the factory and not meant to be removed or fooled with.

 

[yamaharichey]

Thanks, you're the man