I have been experimenting with a different burner set up, one that takes liquid gas from the tank, then vaporises the liquid in the pipe before the burner, will take some photos next time I have it set up on the bench. In the mean time I am trying to finish off a few jobs. One that I have been keen to install is a remotely controlled on/off for the gas supply so in the event of a problem, for example a fouled prop, the gas supply can be turned off from the bankside, also it saves taking off the covers to turn the gas off before lifting the boat out of the water. Next was to install a gas attenuator to turn down the flame at a pre determined pressure, in this case it will be 75psi, just before the safety valves lift at 80 psi. I have tried to install the gas valve, the servo and the attenuator all on one compact bracket.
I thought I had plenty of space, which I have, but it was still a fiddle getting the nuts all done up. I also silver soldered the joints, now this was only my second attempt with silver solder so quite pleased. On the small pipe, the two nuts are obviously captive, I inadvertantly overheated one of the nuts, softening it, as a consequence it went out of shape, which was a pain. I got it back into shape luckily with a bit of pressure and using a 1/4 40 tap to get it round again. Setting up the servo to was also a fiddle, but again I put this down to my lack of experience, I certainly learnt a lot. The highlight was using the mini pipe benders, shaping and fitting the pipes whilst trying to make the installation look neat. Have tested the servo operation, the gas goes on and off as it should so next is to fire up the boiler and get the attenuator set up - hopefully later today. The first photo show the bracket holding the gas valve, servo and attenuator, the second shows the complete set up with the gas valve closed and the third with the gas valve open.