17-12-2017, 03:08 PM
(17-12-2017, 02:32 PM)Zetomagneto Wrote:(17-12-2017, 11:51 AM)Thowdfella Wrote: My carburreter is a Zenith downdraft 30 vm-4 and the car is a pig to start. We thought we had traced this to a worn out mechanical fuel pump as the flow was slow. After replacing it with a new one the flow was really good and it seemed better but if left for a few days it is still very hard to start. I have found that if I remove the float chamber and fill it it starts immediately. I have also replaced the flow valve in the top of the float chamber. Any ideas?
Porous float chamber?.Does the pump have a primer lever, if so does priming prior to start make a difference?
No the float chamber is fine - no fuel inside. Yes there is a priming lever and next time it's cold I will try it. However, today I took the float chamber off and turned the engine over and the new pump is gushing it out. I then took the carb off and checked the throttle spindle for wear but none there. It's as if it needs a higher level of fuel but there's no adjustment for that and if I leave the washer off the fuel cut off valve it doesn't seat very well.