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Dickinson Newport Heater Valve Help needed
I have a Dickinson Newport diesel heater. I did a fuel meter valve maintenance last year, new float, needle valve etc. It was working fine.
After a long layup, I am not getting any fuel through the heater.
Here are my symptoms:
1. Heater valve open, fuel pump on, no pump sounds and no fuel in
2. When fuel line disconnected from heater, pump runs and fuel flows.
3. When I disconnect fuel line and blow into inlet for fuel meter valve
some air goes in, like going through VERY SMALL orifice. I can detect an opening
and closing when I manually open and close the needle valve with the float.
Again, just a slight hiss of air.
4. Valve screen is clean. If I take out needle valve, I get lots of air flow.
Should the needle valve opening be letting more through? Is my fuel pump failing?
Since the valve will feed with gravity only when working properly, it seems that I should be getting fuel from my pump. Perhaps pump is shutting off too easily?
I did all testing with the valve adjustment on full open #5.
I would go ahead and replace the fuel pump, but it seems to be ok and don't want to do so if I am blocking up somewhere in the valve. It should not take a lot of pressure to get fuel flow as these heaters also work with all gravity