Home › Forum › Ask A Member › 1963 EVINRUDE 40 HP EVALUATION › Re: 1963 EVINRUDE 40 HP EVALUATION
Don’t overlook a spec of dirt/junk in the high speed orifice or any of the aforementioned air leaks (which there are plentiful ways for that to happen). Old fuel line from pump to carb is downstream of the fuel pump filter and could clog up the orifices/carb passages.
I’ve seen intake bypass cover gaskets with tiny holes suck air. Yesterday had a 9.5 that was running lean, and it was all attributed to a spec of old fuel line occluding the high speed orifice. Remove, blow out with compressed air, and voila, the motor runs like tops again. Motor ran OK at low speed, but at WOT, within 3-4 seconds would stall out and die.
I’m leaning away from this suggestion – but if the condensers are on their way out, that may present the way you’re talking about but could be ruled out pretty easily on the fly with an air-gap spark tester after the motor stalls out…and it shouldn’t start back up immediately, would take some time to get it up and running again.