QMy Beta JD3 has no pre-filter on the fuel supply, just the enginemounted CAV type. I am going to fit a pre-filter with the top slightly above the level of the fuel tank and the bottom below the full level. Will the engine liftpump prime the new filter?
via email TONY REPLIES... Most narrowboats have the tank well above engine level so once the system is filled, gravity should help.
My engine has been running with the levels as described for more than 15 years now and the liftpump is over 25 years old so yes, yours should prime.
The initial priming should be carried out using the manual lever on the pump (or separate priming lever), rather than cranking the starter.
I would not fit the new filter below the fuel level because it makes the system more -vulnerable to diesel loss if a seal is not fitted correctly.