I added a mini-polishing system that basically consists of an electrical fuel pump plumbed in line with the engine's own mechanical pump. In addition to the polishing function, it serves as a backup in case the engine pump fails.
The pump basically runs fuel through the same primary filter, but routes the output back through the fuel's return line by means of a check valve. The schematic of the fuel system can be seen on the schematics page.
This is a picture of the control switch(es) that I mounted next to the engine. It has 3 uses:
The pushbutton switch "MOM" just momentarily runs the electric fuel pump in order to help with bleeding the system or re-filling a new filter.
The "ENG" switch position is set up to run the electric fuel pump anytime the engine is on (key).
The "ON" position uses the house batteries to run the fuel pump for continous "polishing" through the primary filter. |