Unfortunately, the fan in the eMac is a very non standard fan
(see here).
Actually, my original project, and the reason why I need a new fan, is because I attempted to replace the original, noisy fan. I found the instructions on how to do it
HERE. It involves cutting out the original fan from its special chassis, and then inserting a new fan into it which must also be cut out from its chassis. I replaced it with a Nexus 120mm fan, which is arguably one of the quietest fans in existence. The project went well, and when I turned on my eMac, I was greeted with silence! It was amazing. It was now as silent as my old slot loading iMac.
However, upon closer inspection, my screen was now shaking! It seems that the new fan is releasing a lot of magnetic interference, and since the fan is only about 1 inch away from the CRT neck, is causing the display image to wobble. The original fan did not exhibit this behavior, so I can only guess that it was heavily shielded (which might explain why it was about 3x heavier than this new fan). Since I can live with some slight noise, but I can't live with a jittery monitor, I need to put the old fan back in. But since it was cut out it would involve a lot of work and might even be impossible. I would LOVE to keep this new fan - its nearly inaudible. But while I can stand a bit of fan noise, I can't stand my eyes slowly going bad from reading text on a jittering screen. So now i'm stuck trying to track down a new fan, which is what brought me here
🙂