Home › Forum › Ask A Member › Testing Common OMC fuel pumps › Re: Testing Common OMC fuel pumps
I’ve been running motors dry ever since I’ve been running motors. Without damage. It is true that when they came out with multiple carburetors, OMC said not to run them dry because one would run out of fuel before the others. OK those guys made a lot more money that I did but still I say BS. If running out of gas at idle is going to damage a motor, what is going to happen when you run that 6 gallon tank dry at 5000 RPM?
Opinions will vary, so expect to hear the other side soon.
BTW, some of the early square pumps were junk from the factory. Maybe some still are, I don’t know because I don’t take them apart any more. The ones that I call junk had flapper tabs on the diaphragm to act as check valves. "Real" fuel pumps should have real check valves.
PS. Aslo, some of those pumps wouldn’t lift gas very high. So, if you are running a motor in a test tank, and the gas tank is on the floor, that might have something to do with it.