Originally Posted by tallyhorob
you don't need to bypass the lift
pump, most electoral fuel pumps are add in line to "prime, bleed" the system and can act as a back up if the lift pump fails.
I just bought a small electric fuel pump
which I want to put between my Racor and the engines lift pump on my Perkins
. My question is can I install it inline? or do I need to make a bypass line with the valve. The pump will be used only for bleeding.
I am asking since I thought that during normal engine operation, the lift pump will need to pump the fuel through the (shut down) electrical
pump and I am not sure whether this will work? That is why I initially thought about putting it in parallel but maybe it does not need to be that complicated...
I had quite a number of problems with my Perkins
last season shutting down at the most inopportune moments which we eventually traced to blocked pickup tube in the tank. The funny
thing is I spent $100 on a professional tank cleaner prior to commisioning the new (to me) boat but it turned out that was not enough. What my mechanic
told me (too late!) was that the tank was initially used with gasoline (original engine on that boat was apparently A4) and when they converted to diesel they did not clean the tank properly. Apparently when you start using diesel in previous gas tank a hard shellac develops which is very hard to get rid off. We started having problems after a nice 10h passage
in moderate seaway - probably enough to shake some of that shellac off and block the tube.