Changing fuel water separator on Merc 6.2L MPI 300HP

platon20

Seaman Apprentice
Joined
Jul 15, 2020
Messages
34
I've looked thru at least 10-12 youtube videos, and all of them are for different type fuel/water separators than what I have.

Also I have the service manual and it does not explain the process at all. It's on the maintenance checklist but the manual doesn't have any step by step process for it.

I already have the special tool to remove it.

My main question is this: do I need to clamp the fuel line running into or out of the fuel/water separator before I unscrew the old filter? If air gets in there is it going to screw something up?

IMG_0552.jpg
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,282
no, the anti-siphon valve prevents any fuel issue
 
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