Not sure this warrants a new thread - so will add here.
Been watching forum advice on Fuel Polishing. Planning to build my own parallel circuit. I dont have any additional feeds to use from fuel tank
and will not be adding any. Already have Separ filter in main fuel line.
Consists of - Tee'd spur draw from main engine
feed line (near tank), Solenoid 2 way valve (opens spur when pump switched on) + 12v fuel pump
(max 6PSI), into Racor filter unit & return into Tee'd engine fuel return line. Engine is a Yanmar
Have couple of Noob questions - appreciate advice .. clarity..
1. Currently, the Yanmar
uses a mechanical fuel pump
to draw fuel from tank. Are there any consequences to adding an additional 12v pump to this line, which I guess, would increase pressure of fuel reaching the Yanmar pump ? Can the Yanmar mech pump deal with a positive pressure on the input?
2. if I run the polishing circuit whilst the engine is running - with the 12v pump in the spur - I am assuming I could starve the engine of fuel (8mm fuel line) - hence question on placing 12v pump in main line.
3. If I am pumping the polished fuel back into the existing engine fuel return line - is that OK ? Is there a problem of this line being under pressure and fuel being pushed back up towards the engine and into wherever it comes from ?
hope thats clear and thanks for any friendly advice or comments ...