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Changed out filters on my 06 350 mag, gen 3 cool fuel, with 146 hrs
I have changed cartridge filter twice, boat had 46 hrs when purchased
I have never changed the disk filter
They both looked dirty to me Hope you can see the new disc filter on paper towel, it’s slightly cleaner than old one

Both of them are plenty dirty I would say.

Where are they located?

Bwoz wrote: Sun Jun 24, 2018 9:43 pm Where are they located?

What engine do you have?

6.2l mercruiser

I'm thinking yours is like this.
https://youtu.be/8m7qNw1sWcA