12-11-2018, 05:17 PM
The saga continues!
Got the main jet fibre washer out and was unable to blow though to the venturi. Did a bit of digging at the base of the venturi and eventually was able to get a clear passage from the main jet to the venturi.
That will fix it thinks I.
Reassemble everything, starts fine on the choke.......Attempt to do without the choke & the engine immediately stops. By closing the intake completely with a hand palm fuel was sucked in - & the engine ran without choke very briefly.
A quick old style test of liquid sprayed onto the inlet gaskets (manifold & carb) did not change the engine note, so no sign of air leaks there to weaken the mixture.
The car runs remarkably well fully choked! ticks over well, pulls ok, no exhaust black smoke. I drove it around the block without problem, so what is left to examine/change?
It seems to me that the base of the problem is that the engine is starved of fuel unless choked.
So what else affects this? About the only thing left in my thoughts is -
Float level? There is a 1.5 (marked) needle valve - the correct one according to the book! and it appears to open & shut perfectly. It has one washer (aluminium?) from the overhaul kit. but is the (non punctured !) float at the right height? How significant is this?
Fuel flow. There is a clean in line filter...I will remove this to see if that alters anything, but I am not hopeful as fuel flows freely through it and when running fully choked, the engine revs remarkably freely!
I don' t want to drive around with the choke pulled out....so what next?
Got the main jet fibre washer out and was unable to blow though to the venturi. Did a bit of digging at the base of the venturi and eventually was able to get a clear passage from the main jet to the venturi.
That will fix it thinks I.
Reassemble everything, starts fine on the choke.......Attempt to do without the choke & the engine immediately stops. By closing the intake completely with a hand palm fuel was sucked in - & the engine ran without choke very briefly.
A quick old style test of liquid sprayed onto the inlet gaskets (manifold & carb) did not change the engine note, so no sign of air leaks there to weaken the mixture.
The car runs remarkably well fully choked! ticks over well, pulls ok, no exhaust black smoke. I drove it around the block without problem, so what is left to examine/change?
It seems to me that the base of the problem is that the engine is starved of fuel unless choked.
So what else affects this? About the only thing left in my thoughts is -
Float level? There is a 1.5 (marked) needle valve - the correct one according to the book! and it appears to open & shut perfectly. It has one washer (aluminium?) from the overhaul kit. but is the (non punctured !) float at the right height? How significant is this?
Fuel flow. There is a clean in line filter...I will remove this to see if that alters anything, but I am not hopeful as fuel flows freely through it and when running fully choked, the engine revs remarkably freely!
I don' t want to drive around with the choke pulled out....so what next?