Gravity Fed Oil Pump?

[John]

Glad you are happy but I think if you had "primed" the pump it would have worked fine. I suggest you don't throw the old unit away. (You could of course put it on ebay to offset your outlay)

[Dave Liquorice]

Not in my book but do the boiler efficiencies take that into account? They must simply take energy in and energy out via the pipe work. It would be very difficult to account for losses via the casing and flue as they would be totally dependant on where the boiler is located.

[Michael Chare]

and consequently they end up publishing misleading information. (Well that's my theory!)

[isthatthetime]

I pulled oil through by suction and primed the pump - but with this pump if the oil level is lower than the pump then it simply won't work.

[John]

You still haven't told us what model of burner/pump and final pipe connection you had but I suspect that the old pump had an internal bypass port open for single pipe use and this would need some help in priming. You might have saved £200 (or not as things developed)

[Nick Atty]

It's what early oil fired canal boats did (and some modern ones using old-style engines). Your engine is gravity fed (you have injection pumps but no lift pump), and you have a "day tank" high up in the engine room that holds enough fuel for the day. At the start of the day you work a manual pump to move enough fuel up from the main tanks into the day tank.

Very simple with not much to go wrong, and keeps the fuel weight low in the boat.