23-11-2017, 05:46 PM
(20-11-2017, 06:51 PM)Dave Mann Wrote: With the carburettor on the outside bench I connect up an old lawn mower petrol tank to it for checking the fuel level with the main jet removed so I can actually see the fuel level. I find that T cut does a good job of seating the needle into the seat.
That may have to be the next step. I have tried raising the seat by additional washers & that didn't help much, nor did going back to a single washer. What I find strange is that as long as the car is running - even at a slow tick over, the carb doesn't leak at all! The needle is soldered ( I think I got it from Willie at Beaulieu, with the seat) and I have lapped it in a touch, also where the weights meet the collar. It all spins nicely!".
The only thing I notice is that the one of the bob weights (which I have inverted so that the unworn side is presented to the float) when the needle is in it's uppermost position, hangs down about 1/16" and is "loose" in the groove of the needle. Maybe I need new bob weights...there is no wear on the spindles nor the holes in the bob, so I cannot see why one has this extra vertical movement!
Sod's law, I cannot find the old needle & seat.....but anyway the reason I bought new was that the old one leaked AND THAT STARTED THE WHOLE SAGA!
Meanwhile I keep the extinguisher handy.