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Starting problem. Flooding?

M

Macawman

New member
Working on a 1956 Johnson 10hp. Yes, it's old, but very low hou.rs, excellent condition and runs if and when it wants to start. Compression is
good and it's getting spark. The problem seems to be fuel delivery. The carb has been completely rebuilt including the float, valve and needle. The float valve passes all the test for proper closure. However, when I pull on the starter rope, gas runs out the opening of the carb and the motor acts flooded. I have removed, disassembled, inspected, tested, reassembled and reinstalled the carb per the manufacturers manual 4 times now but to no avail. Should mention that the carb was doing the same thing before the rebuild. I know it appears that the float valve is not working properly once the carb is assembled and installed, but darned if I can figure out why. Anyone every encountered is problem?
 
Thanks for the response, racerone. I don't know about a 5/16" gap. I will have try that. I should mention that the plugs, points and condensers are brand new and have been rechecked a number of times. The points are gapped at .020 and plugs are currently gapped at .030. I have seen a spark jump the .030 gap and I have one of those inline test lights that install between the plug wire and the plug that current is being provided. I'll have to set up a 5/16 test gap and get back to you on the results.
 
Your ignition was engineered and built to be able to jump a gap of 5/16"---Not the 0.030 plug plug laying on a block.-----It takes much more voltage to jump that same gap on a plug inside the cylinder with air compressed to 120 psi.----That simple fact fools a lot of folks , sorry.
 
Another thought. The spark plug wires were also replaced, but I didn't order OEM. I just bought high quality automotive wires at a parts store. It occurs to me now that they are what I believe they call resistance wires to prevent audio interference. Could that be causing a voltage issue?
 
Your motor uses " solid wire " core plug wires.----Not sure why anyone would install automotiveparts in a fine old outboard motor.
 
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