How to physically ID a 6200.70 from 6100.70?

[xinumaster]

I'm not sure if my drive is a 6200.70 or 6100.70. How can I physically ID a 6200.70 and 6100.70?

 

[rvitko]

At the center of the propeller it is stamped with the size in mm, it is quite small and hard to read. It will say 42mm for 6100, 48mm for 6200.

 

[xinumaster]

Thanks.