Hi all, Just thought I would put up a photo or 2 of my recently acquired Primus 744 roarer burner. Tried firing it up as is but won’t hold any pressure in the tanks. Replaced the washers on the filler lid and pump lid and fitted a new leather pump cap to no avail. Seemed to be relatively clean in the tank before I refuelled it. Having few problems getting the NRV out at the moment. Any tips please? Awaiting washers to replace on all the burners. Got the “flame rings/spreaders?” from a local fabricator I know, not the exact size but should suffice for now. Surprisingly, the stove came cleaned-up like this. Some fuel is coming through on one burners but will not light. Could the burners be blocked up. Thanks in advance
Take care with the NRV. The best bet is to use a steel rod the same diameter as a snug fit in the pump tube (eg a bolt); with a slot cut 5mm wide and 5mm deep across the bottom of the rod. Use some acetone and or penetrating oil down the pump tube overnight before unscrewing the NRV. A lot of downward pressure while applying and lateral torque. Tony
Good Morning, I have been successful in removing NRVs with my selfmade tool. Might be worth a try. You can see it here: New member and how to remove stuck NRV when the NRV head is damaged. Normally, changing the burner washers is not neccessary unless the connections between burner and riser tubes are leaking fuel. Did you clean the jets? If the jets are blocked, it may explain that there is only one burner emitting fuel. You have to preheat sufficiently, because the burners are of the large type, especially your very heavy flame ring spreaders take a lot of heat unless they reach working temperature. That may explain, why the fuel does not ignite. And if the pump and NRV is working correctly, you have to pump a lot, because it is a large tank capacity.
