[SkunkBoat]

is it one of those new unvented tanks? Open the lid..

Did you have a water separator/10 micron filter connected when you had the problem with water?

It was running good ?and then you got water and it died?

There was water in the rail?

There is a low pressure fuel filter & pump (easy) and a high pressure fuel pump & filter (hard).
Check the low pressure filter for water. If it aint in there it aint anywhere.

You may have an airlock now. Check that it pumps fuel to the low pressure filter.

Don't take hard things apart before you try the easy ones. They are first in line

I have a pdf of theSuzuki DF140 service manual. It might be similar enough to help you. Send me a PM and I'll email you a link to download it from Google Drive.