Dear all, We used to have a Taylor cooker with the swiss Bertschi burners. Developed a leak and decided repair best left for long winter nights - spare parts for these burners not easy to get hold of and want to re-build to standard burners. We installed a 2nd hand Optimus 155 for this summers' sail north. The burners seemed a bight dodgy, and being of unknown age I decided to change both burners to the new Hanse burners ( had these onboard from fettling with the old Taylor - long story). Changing burners was straight forward, but I cannot seem to preheat them properly. We have always got away with using 10 mls of methylated spirits for preheating, without the white "sponge" that comes with the new burners. I have now tried up to 30 mls of methylated spirits for preheating, the burners just doesn't seem to get hot enough and flares up. I have tried both with and without the white sponge. I have not tried with a torch. We got one many years for this purpose, we didn't like it. Noisy and then there's the gas issue. But it is at home in the basement somewhere. Seem to remember we used it when the only replacement burners were the two- legged variety that were a hassle to pre-heat. I will now replace burners again and put in the old ones. But does anybody have any suggestions why I cannot get the new Hanse burners to work? They seem to get raving reviews from everyone. Our summers sail will take us north to Spitsbergen. We can cook on our Refleks heater, but it is cumbersome and we do not have it lit when offshore. So any suggestions are be greatly appreciated!