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

[FourBlades]

The thing which caused my floats to hang up was the 90 degree arm that goes down and controls the float range of motion. If the float arm got cocked up it was this lower arm that would get stuck and not let the float move up and close the needle valve.

I am sure this makes no sense unless you have taken a weber or dellorto apart.

I caused this problem when bending this lower arm to reset the open versus closed height of the float. Make sure your float can still move correctly after adjusting it.

BTW, these heights were wrong on 2 sets of carbs I got in the mail. The floats bounce a lot in shipping with no fuel to cushion them leading to them being out os spec. (I think McMark id-ed the cause of this problem). If the float levels are off then you run leaner or richer than you should and it makes tuning harder.

John