Dellorto problem. disaster averted, garage reeks of fuel Options

[rhodyguy]

all set, ready for fire up, energize the pump (didn't spin the engine) and the pump doesn't quiet down (cb carb pump) as the bowls fill as it did with the webers. i look over and there's a thin fountain the coming up and fuel welling thru the square in between the main stacks on the dr side carb. puddles on top of both of the throttle plates.

the pass side has the duel banjo fitting. fuel supply line connects to one fitting and the other fitting is supposed to supply the dr side eliminating the need for a 'T". does it make any dif which fitting gets the pump supply and which one connects to the dr side carb? top fitting as opposed to bottom. the dellorto book mentions the dual banjo but doesn't specify if it makes a dif where the lines are/how hooked up.

i had just changed out the oil so i know the 3 1/2 quarts of BP will get dumped. any ideas?

k

[DBCooper]

You didn't mention the needle valves. You say except that one piece of crud the bowls were clean, the needle valves too? When the tops of the carburetors are off you can hold the tops up level, let the floats dangle. and raise the floats up until the needle valves close, watch the action. Then you can action the needle valves manually, feel them to see if they're sticky, if they hang up for any reason. No problem there? And with the floats off, needles out, looking down into the seats, nothing?

Those valves are what control gas coming into the carbs, managing the fuel level in the bowls. If there was overflow they pretty much have to be involved, for some reason didn't close and shut off the fuel flow. You may have already dislodged anything that was keeping them from closing, but you need to be sure. Probably need to look at your fuel filter too, since that crud in the bowl means something isn't working as intended.