Heater starts then flutters and goes out took apart to check out and familurize myself tried adjusting pressure now the flame wont stay on when i put the top on ,lift the top and it kinda starts but not like it should.
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This type of heater can be temperamental because they are often stored for long periods in unsuitable conditions, aren't serviced very often and the remnants of fuel are left inside the tank during storage.
Kerosene has a fairly high natural water content, the tank is vented and normal air pressure changes will allow further moisture and dirt to enter the heater.
Good heater operation depends on very clean and uncontaminated fuel. Tiny dirt particles and contaminants can corrode, wear or jam the spinning spray head.
I suggest you service the heater - a thorough internal clean of the fuel system, clean the filter(s) and spray head, check and if necessary adjust the air pump regulator pressure and ensure the spark plug is clean, in good condition, is correctly gapped and the spark is constant and steady.
Your heater should then be ready for the coming winter season at the end of which, perhaps different summer storage arrangements would be advisable.
I've had mine for about 8 years now. Just started spitting out fuel and failing to ignite. Took it all apart and found a couple of cracked lines where they went on to the fittings. One was to the air pump and the other was a fuel line at the manifold. Cut them both back and reattached, but it still wouldn't ignite. Then I checked the pressure coming off the air pump and it was at 2 psi, should be at 3.4 on mine. Adjusted the fuel pressure up and bingo, it lit right up as soon as the pressure was right.
You need to make sure the pressure it correct and that you have no leaks or cracks on the rear cover of the pump. Sometimes you will get a small crack in the plastic housing and it will cause low pressure. Check to make sure the photocell is clean and lined up properly to see the flame. If you hold you finger over the pump adjustment screw you should see the pump pressure go much higher.
As a licenced plumber the only thing I will suggest is to call someone and have them service the heater.
Gas is deadly, and it sounds like there is something blocking the injector port, causing the gas/air mixture to not mix properly, which will make the flame change colour and characteristics.
The burner may need to come out, the inlet gas pressure will need to be checked and other things.
The rinai heaters are also expensive, as you would know, and trying to fix it yourself is dangerous. Also, once serviced by a plumber you will have the peace of mind to know it has been serviced properly and will run well for many more years.