I'm just putting my boat, which I've just bought, back into use after being laid up for a few months. After getting the air out of the gas and water pipes, I finally got the water heater running, and while it generates a lot of hot water, the temperature of which is controllable from lukewarm to "Ouch!!!", the pilot light is slightly yellow, and the main burner flames, while blue with basically the right cone pattern, are lifting off at the back of the burners. The heater is an 11Kw unit.
Is this likely to be caused by a misadjustment of an internal gas pressure regulator which can be corrected with a pressure gauge and a screwdriver, or is it something that needs a full service by a professional gas engineer? All the venturis are immaculately clean. The boat gas pressure is correct within the limits laid down under the BSS tests. If I turn the temperature down, the flames settle back onto the burners.
Or, is this, in fact, just normal behaviour for a Morco water heater?
I'm in a bit of a hurry with this, as the boat is due to be launched in a a week or so, and I will be moving on board a week after that.
Thanks in advance.
Bye!
John.