Can Canon USM motor interchangeable?

[fsong00]

While I was trying to fix a Canon 17-85mm IS USM lens, I found out it was a USM motor failure.

I had a couple of other lens disassembly, such as 100-400mm. My feeling was the USM

motor of them are the same. I regret that I did not measure the diameter of them and other parameters...

Do anyone know if I can recycle those USM motors from other broken USM lens? Or is there a 

compatible USM motor list that I can refer to?

Many thanks,

[fsong00]

Hi, Mike,

The 4 pins version was from an old 28-80mm MicroUSM II lens (Discontinued). I tried to fix it by finding a good candidate but ended up with finding 4 pins and 5 pins...

Fan