Picture shows 2 pumps, one is from my V4 which runs fine and allways has, the other is from a SWB 76 which I've just done some work on, runs fine on test and then all of a sudden runs as though fuel starvation, slowly dying witha repreive if you pull the choke out! and sure enough no fuel in float bowl and no signs of fuel in the inline filter I've fitted, problem is once running again fuel pumps normally and a way it goes no problem at all.
Bypassed the pump with the hand one so i could run the engine to test. Get nice vacuum readings on the input side of the pump and nice presure out the exit and the hand primer pulled fuel up from the tank no probs.
I've fitted a spare pump same as mine and it seems to work fine but then it worked fine on test with the orig all last week so I may have to drive a very long way to know if its working normally
Question is which is correct pump and are there known varients? and if theres a wrong one whats it off?
And ive deliberately not told you which one is from the intermitent runner!!
Any thoughts?
