Here is what I use on my 12V and 24V. I got a 10 micron $25 (delivered) filter from a tractor supply place. Replacement filters are $5.
I drain the old and put it in a 5 gal pal with hand pump. I pump it through the 10 micron filter and into plastic bottles to mix with the fuel.
The 24V has a Vulcan big line kit and relocated pusher pump. I added one of the 10 micron filters to to frame as a pre filter.
Scroll down to the NS-10 filter. http://www.phoenixpump.net/nationalspencer-3.htm
I drain the old and put it in a 5 gal pal with hand pump. I pump it through the 10 micron filter and into plastic bottles to mix with the fuel.
The 24V has a Vulcan big line kit and relocated pusher pump. I added one of the 10 micron filters to to frame as a pre filter.
Scroll down to the NS-10 filter. http://www.phoenixpump.net/nationalspencer-3.htm