firstbase
Guru
- Joined
- Nov 6, 2016
- Messages
- 1,644
- Location
- United States
- Vessel Name
- Black Eyed Susan
- Vessel Make
- Grand Banks 42' Classic
I'm sure this is revisiting a well worn subject and I have searched and found some info here and at boatdiesel.com but thought I would ask anyway. Maybe someone can point me to a thread if it is too worn....
Have a new to me GB 42 classic w/ FL SP135's, 4100 hours. Went through the boat with a fairly well known guy who helped me to understand some things. We opened up and changed my primary fuel filters, Racor 500's with 30 micron elements Two in parallel, switchable, on each tank. These are followed by Lucas HDF296 5.5 microns (I think?) on-board engine filters. Starboard side primary Racors were clean as could be. Port side, forward primary filter very clean. However, the aft filter was black as could be with tar/gunk. Spoke with the PO and he explained the why of this (involved some bad fuel) but that's another subject. The guy I had onboard said that I should open up the on-board filters and see what I have going on there and replace as necessary (can't find a good tutorial on doing this so may call someone to show me the first time). Then he said I should replace the primary 30 micron elements in the Racor's with 2 microns for better protection.
Seems to me that this would eliminate the on-board filters from the equation as they are 5.5 mic. Any thoughts or comments on replacing the 30 microns with 2's? I know there is more to proper element use than simple microns but thats what I have to go on today!
Have a new to me GB 42 classic w/ FL SP135's, 4100 hours. Went through the boat with a fairly well known guy who helped me to understand some things. We opened up and changed my primary fuel filters, Racor 500's with 30 micron elements Two in parallel, switchable, on each tank. These are followed by Lucas HDF296 5.5 microns (I think?) on-board engine filters. Starboard side primary Racors were clean as could be. Port side, forward primary filter very clean. However, the aft filter was black as could be with tar/gunk. Spoke with the PO and he explained the why of this (involved some bad fuel) but that's another subject. The guy I had onboard said that I should open up the on-board filters and see what I have going on there and replace as necessary (can't find a good tutorial on doing this so may call someone to show me the first time). Then he said I should replace the primary 30 micron elements in the Racor's with 2 microns for better protection.
Seems to me that this would eliminate the on-board filters from the equation as they are 5.5 mic. Any thoughts or comments on replacing the 30 microns with 2's? I know there is more to proper element use than simple microns but thats what I have to go on today!