We have had one of those on our yacht for 25 yrs. They are an excellent stove
. We still use it.
The oven vent is not a flue.
We normally hang a domestic oven thermometer in the oven, as the stove's temp gauge is not that accurate.
It is much easier to pump
up the pressure with a bicycle pump
From memory the burners are self pricking Primus type.
You can dismantle them for cleaning
. There is a special tube spanner to remove the jets, but you can make one by filing a slot in an appropriate bolt.
If you remove the burners from the stove you will probably have to replace the metal washer under the gland nut. Also take note of the position of the pricker, as it has a particular setting in relation to the closing of the needle valve.
If you need to clean the tubes in a dismantled burner, I have found that a length of 3mm stainless multi strand wire, frayed at one end, and rotated in a battery
drill against the lay will get a lot of the carbon out when inserted in the heater