Help Mabel Boiler ?

[Stewart HartParticipant @stewarthart90345]

I’m building a 3 1/2″ gauge Mabel I’ve got a air running chasie, and I’m nearing the completion of the boiler but I’ve run into a problem with the backhead. I’ve made and soldered the firebox back in place complete with fire hole this is made exactly to drawing with the fire hole centre 1 13/16 from the top of the fire box, but this puts the fire hole 1/4″ to high in the back head so I’m assuming that the drawing is wrong.

 

If I make the fire hole in the backhead fit, the water gauge and clacks will stop the fire hole door from opening, hinging the door from the bottom will get around this, just to check this fit out I made the clacks and water gauge, and came across another problem there is no way these parts will screw into the backhead together without fouling on each other.I’m now thinking of making a new backhead and repositioning the fittings on it. Are there any other Mabel Builders out their who have come up against this problem, and how did you get round it, or can anyone else give advice that will help me solve the problem.

 

Stew 

 

 

 

[Stewart HartParticipant @stewarthart90345]

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