TR2/3/3A S U jet centralizing

[Grainger 268]

What's the best, easiest way to centralize jet on H6 SU carbs on tr3. Rear one running rich and doesn't descend as rapidly as front

 

[mctriumph]

It will self center when the assembly is loosened.The fuel bowl is in the way and it may be easier to
remove it for access. Of course the piston/needle must be in place and the mixture nut backed down.
Mad dog

 

[Grainger 268]

Thanks, I'll give that a try. Tim

 

[NutmegCT]

Tim - take a look:

Tom M.

 

[karls59tr]

I have been using the Moss jet centering tool without any issues. Have others found problems with the tool?

 

[Brian_Jones]

What's the best, easiest way to centralize jet on H6 SU carbs on tr3. Rear one running rich and doesn't descend as rapidly as front

It isn't the speed of descent but the metallic clunk as it reaches the bridge that determines if a jet is in the centre.
The descent gets quicker as the piston and housing wears. IIRC, decent for the piston should take around 4 seconds and the pair should drop together.

 

[KVH]

It will self center when the assembly is loosened.The fuel bowl is in the way and it may be easier to
remove it for access. Of course the piston/needle must be in place and the mixture nut backed down.
Mad dog

I think the mixture nut is supposed to be raised to its highest point when centralizing.

 

[sp53]

What you want is nothing touching each other, everything needs to float. The needle in the center and the piston not touching the sides. Oftentimes the tool does not work that great , but it will get you very close, and you need to fiddle with the jet assembly to get that sweet spot that might not be centered to the eye. The piston needs to fall free.

 

[CJD]

+1...it's "fiddly". I found the tool to be about as fiddly as just setting it by hand. The key is keep setting and checking until you finally "hit it" right on.