Mine does not have any weights, so another small issue then. What is the minimum weights I need and where is the best place to fit them?
Do the weights vary for each 4-4-2 engine or are they the same for all engines?
They vary by production year and features on the specific model you have.
Since you have the long levers for the motor reversing control, your loco could have two small weights that fit on the inside of the cab, one under each cab window. They are basically frame weights from a 4686/4687/4689 presidential type electric loco, re-used for the steamer application by AF. They are secured by the screws that hold the firebox sides to the bottom of the cab (screws extend up through the floor into the weight).
Just to be clear: THE LARGE COMMON CAB WEIGHT WITH THE SMALL HOLES (the one that fills up the entire cab) WILL NOT FIT WITH YOUR LARGE REVERSE LEVERS. This weight came out around 1932, after they revised the motor to small reverse levers. If you happened to find the large cab weight with the large slots cut in it, that would work, but is a very rare weight as it only came in the higher trim full piper loco for a very short period of time.
You could also have a large, solid chunky boiler weight that "hangs" in the boiler, suspended by a longer 6/32 screw, through the hole you see on the top of your loco just behind the slot (behind the smokestack).
I've seen original versions of your locomotive come with:
- all 3 weights
- just the boiler weight
- just the 2 cab weights
- no weights at all
It depended entirely on which set it came in, trim level, how much weight was needed to pull the train, price point, tender type, and some typical AF haphazardness.
The only weights I could find on Hennings website were these later type, that fit just behind the steam chests, on the same screws as the filler plates. You could use these. Typically AF used two per side (4 total) and mounted them so the little angled edge was pointed backward and cleared the drive wheels. You will most likely need longer screws to mount the two weights, plus the filler plate to your locomotive body. Flyer typically mounted these and then painted the body, by the way, so that the screw heads had a nice finish of paint and didn't get blemishes from mounting afterward.
http://hennings-trains.shoplig...-of-shasta-loco.html. (not sure why the link says Shasta steps...just ignore that)
They would probably work for you, although not perfectly correct for your loco. Nobody except me would probably ever notice or care though.
Like I mentioned before, don't get hung up on searching for all these weights, until you've decided what you want to pull. The loco by itself does a decent job if you have good, level track. You could also get some sheet type lead and "roll" it into a cylinder and "make" your own boiler weight.
Sorry, I know this is somewhat harder without pictures, but I'm not going to disassemble all my steamers just for pics.