Quote:
Originally Posted by Number_Cruncher
Sorry for being a latecomer to the thread.
I've a basic question about the lift pump - I've never had one apart on these engines, what's inside them, and how do they work?
Specifically, are they like the mechanical fuel pumps fitted to petrol engines with carbs, where the pressure is actually provided by a spring in the pump rather than by direct, solid mechanical action.
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Well that makes at least two of us that have never had one apart. I suspect it is a pretty conventional pump. Where the cam drives a rod that presses the diaphram. It is a constant supply type of pump as it produces constant overflow I believe.
There really nice thing is it is rebuildable at home with a kit at very little cost. Kit over here seems to average 6-10 dollars. No I am not absolutly sure of the mechanisim set up. I suspect the more direct diaphram drive because the operating pressure is well beyond petrol or gas engines fuel pumps with carborators.