Re: flooding carb on super 8

Posted by Owen_Dyneto On 2010/9/27 8:38:53

Just a few more thoughts. If you're willing to consider a professional carburetor rebuild, in my view there are none better than Daytona Parts down in Florida. Their experience with EE-22/23 is extensive.

You can check the fuel pressure by inserting a Tee in the feed to the carburetor somewhere after the pump (use rubber tubing if easier) and place the pressure gauge in the Tee fitting perpendicular to the line. Initially turn off the electric pump and crank (or start) the engine. Pressure should be not less than 3 nor more than 5 psi. At that point optionally turn on the electric pump to see what pressure that's giving, though you say you use the electric just for priming so it's likely not part of the problem. But if the needle and seat are indeed leaking, the pressure readings taken this way will be faulty (lower) so you might want to plug off the line to the carburetor so their is no fuel flow and check in this manner. Pressure provided by the mechanical pump is determined by a spring that forces the diaphram upwards (discharge). If the mechanical pump pressure is too high (extremely uncommon) perhaps some bloke rebuilt the pump and used an incorrect spring?

If the needle/seat is leaking, its not really possible to get an accurate float setting by measuring the fuel level. The main discharge jets are properly just above the fuel level such that the vacuum generated by the venturi draws the gas from the jet tips. If the fuel level is too high they will be constantly force-fed by the fuel level.