18-12-2017, 08:46 AM
(17-12-2017, 09:32 PM)Thowdfella Wrote: I have the filter off so I can see the choke and it's definitely closed. Definitely not stale Petrol as I have just thrown the old away and put fresh in. I am interested in the "idle circuit" as I don't know what that is. Could you explain please? I am sur the clue is that if I fill the float chamber it starts immediately.
It is a small drilling in the carb body that exits just below the throttle butterfly it bleeds fuel air mixture when the butterfly is closed and is connected to the mixture screw, they can become blocked and may be linked to your issue. It may simply be that the fuel drink from pipe to the carb, and small amount of fuel evaporates from the float chamber, all then need to be recharged in order for a cold start mixture to be rich enough. if after priming with the pump lever it starts instantly I suggest the latter.
Black Art Enthusiast