Home › Forum › Ask A Member › 57 Johnson Javelin runs and then stops after about 40 seconds › Reply To: 57 Johnson Javelin runs and then stops after about 40 seconds
I agree with Dave. Sounds like its running on whats in the float bowl. If using a pressure tank, is it making pressure? When engine dies, unscrew cap and see if it releases pressure. If no, check hoses for leaks/plugups, tank gaskets for seal. If ok, prime float bowl then disconnect line at carb, put line in container to catch fuel, and start. If fuel comes out, carb issue. No fuel, trace it back to tank. If a fuel pump, are you tank testing with the tank on the ground? Did a FP conversion on a ratty Fleetwin years back, had same issue. Turns out the pump (Mikuki) couldn’t “lift” the fuel that high. Put tank on a five gallon bucket, ran great.
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