spacing between oil seals

[Whaler12]

Hi everyone,
I have a 1986 90 HP Yamaha ETLJ, I am replacing the oils seals on the lower unit and was wondering if there is a spacing measurement that needs to be maintained between both seals(located under water pump housing)?

[boats.net]

Yamaha's special seal driver sets seal depth, Yamaha doesn't list specs on depth.