This can't be right, can it?

[Incubus]

Because of my continuing idling and low rpm running issues, I tore down my carbs again today. I noticed something, that seems like it can't be right. My carbs are from a 1979 Special. They have a capped pilot jet tube and a hole in the wall between the main jet shaft and the pilot jet tunnel apparently to feed the pilot. When I pulled the emulsifer tubes I noticed on the end of the emulsifer tube there is a hole in the side that looks like it should line up with that hole in the wall between the jets.

Of the four, only one hole in the emulsifier tube matches the hole in the wall between the tunnels.On the other three tubes - which only go in one way because of the peg and groove - the hole is 180 degree off and faces the opposite wall.

I'm thinking that is wrong. Shouldn't they all line up? And why are there emulsifier tubes with the hole apparently on the wrong side?

Could this be the breakthrough that has been eluding me? Or is this the way the carbs are supposed to be?

Patrick

[TopCatGr58]

Hey Pat,

Check your PM box, sent you a reply.
T.C.

[Ken Talbot]

I just had a look at the emulsion tubes in all four carbs of an old style set, and all four carbs of a new style set. All 8 tubes look like this, with the hole you speak of:



The old carbs are bored, like you describe, to supply fuel to the pilot circuit. The new carbs are not bored.



In all cases, the hole in the emulsifier tube lines up with the wall towards the pilot side, whether or not the wall is bored. Sounds like a PO slipped in some new emulsion tubes that do not belong.

[Incubus]

Thanks, guys.