modification to old Marathon wood boiler

Stephen F. Smith

Iam trying to improve the my old Marathon wood boiler. I would like to install the fire bricks or insulate the outside jacket and looking to change the air daft control as well. The boiler works great but consumes a large amount of wood very quicky and does not hold the heat well.The inside grate is gone and looking for ways to inprove this old relic.I have a magic heat connected to the top section in the stove pipe but it scares me.