Morris Minor Owners Club

Hi , friends.

My SU fuel Pump does not stop working if the fill flot from fuel , it change to speed low but not stop - second by second sound " tik .... tik "
I have seen some pump totaly stop working when flot fill.
Where the Problem ?
Regards
Sandun.

Either you need a new float valve in the carb, or new valves in the pump, or the pump diaphragm has sprung a leak.

rebuild it...it's easy

Usually it is dirt in the float valve, or a worn valve that causes this. Or the float itself has sprung a leak so it doesn't close the valve (not uncommon on the old brass floats). I would check the float unit first, beore pulling the pump to bits.....

Observe all precautions for dealing with petrol - good ventilation, no sparks, suitable container etc.

Remove the end of the flexible fuel pipe from the carburettor and direct into a container. Switch on the ignition, observe petrol flowing into the container. Place your thumb firmly over the end of the pipe to make a seal. If the pump stops ticking then that is OK and the problem is in the carb - valve or float. If the pump continues to click when no petrol is flowing, then it is a problem in the pump. Switch off ignition, reconnect the pipe and pour the petrol back into the tank.

At least you will now know which item needs attention.

Thank you very much to all .