I experienced some loss of power this weekend. It is time for some fuel maintenance. I have a few questions:

My Engine details to follow:
Model. 2QM15
14.Hp@3000
Prop 1400 rpm
2.14 reduction
Sr number. N2336
Block no. 84702

Can someone post a link to a current recommended Raycor filter/water separator?

Zephyr V2.0's issue we think is the bleed plug on top of the fuel filter housing. What are my chances of purchasing a new housing for a 30 year old engine? I will replace the copper gaskets. If so, what is the best source to purchase? Torrsen Marine or Labordes, etc...

What is the recommended diesel additive to prevent "the bug"?

My tank was cleaned 3 years ago. How often should we clean tanks?

Thanks!
Dave@j30.us