High speed needle seized?

[oldboat1]

Might leave it and use some epoxy or crazy glue to make sure there is no air leak.

Still recommend you soak everything metal (leave linkages in place) in lacquer thinner or similar -- should be shiny brass or aluminum. Physically clean out all passages (take off the domed fitting on top before soaking). Leave any lead plugs in place.

 

[merkdawg0084]

Thank you oldboat1

 

[jonesg]

f
Q: does a metallic circle expand outwards when heated or does it expand inwards when heated

presumably…. if the carb body is warmed up before the brass shaft starts to expands outward ….then the threaded aluminum portion of the carb body (hole) should start to expand outwards releasing its grip in the needle while the needle shaft itself can be frozen & shrunk with a blast of canned air …:smow:

web searched for an answer ….:ranger:

Real life example -- in the 'old days' of wagon wheels, they were wood with metal rims. The metal rims were heated, they expanded, the rims put on the wheels and then quickly cooled. The rims shrunk, fitting tightly.

So, the 'inside' of the metal rim expanded to fit over the wood, and thus the real life answer is that the 'hole' gets bigger when heated.

Yep, imagine a ring made up of balloons, inflate them all and they push each other away,
electrons cannot cross into each others orbits due to exclusionary principle.
When heated electrons around a neucleus jump to higher orbits , same as the inflating balloons.

I like the wagon wheel practical answer, but it helps to understand the physics too.
one day you might get stuck on a desert island with ginger and need to sound clever.