Fuel pump failed

[Phil Waterman]

Hi Guys

One thing I've noted is that fuel pumps mechanical or electrical don't seem to like standing empty and dry once they have had ethanol gas through them. They seem to loose the ability to self prime. Some times once you get fuel back into them they will start working again.

Noticed this problem when setting engines up on the test stand that once the engines were ready to install if they stood with no fuel in the fuel lines and pump(s) while waiting to be installed in the trucks the pumps would not work when installed. In that case the solution seems fairly simple when I finish running the engines in on the test stand make sure the gas line and pumps are left full of gas and plug the end. On the test stand I use an electric pump and when done with test runs with fuel in line just loop the outlet back to the inlet side. Have also tried squirting some oil into the pump but the jury is still out on does this work.

Cheers Phil