Started with the avenger 210. Anybody who knows that machine knows the heat exchanger constantly breaks.
I repaired it many times before turning it into a propane burner. The coupler popped so many times I had it down to a science. 30 minutes flat. Then I home build a 20 hp Briggs with a number 4 blower still using the same burner and frame. Both machines killed motors and were loud. I got tired of the short lived loud engines and was going to build one using a water cooled engine when my dealer showed me the Blue Line. It has been the most reliable motor ever. Damn thing just won't die. Runs as good today as ever. Started out burning 1.23 gal per hr on high and still does. Haven't been able to check it sense the hr meter died but still buying it at the same rate.
Gene
Maybe guys are getting better at solving their own problems. 
