It sounds like the HM 427 has more issues then other HM TM's. Is there just more maintenance that needs to be done on them? It sounds like the max470 is worth the extra 3-4k? or would you jump to the TITAN?
Max has more heat and better engine. Although the Titan is dual wand capable however it probably will need an LP burner to heat dual wands a fuel injected engine too....however keep in mind I've never used one to tell. There is a guy on this board that has one and you can ask him. Just do a search to find him.
I haven't seen the Titan in action but I've heard many reviews and by the sounds of it it's well worth the money. It can keep up the heat dual wanding no problem. It is fuel injected, 61hp GM Vortec motor.
1.2 gallons per hour is awesome. That would save me $50 a week and pay for half the machine in 6 years with the savings.
I do have to question why Hydramaster has to go and claim three wand capability. Makes me wonder if the other specs are exagerated as well.
The max is edging 2 gph......the 421 is around 1.2 gph. The 427 is about 1.6 gph.
The cds is rated 1.6 at 12hg with a chevy van....I see about 1.7-1.8 in the field. I don't have anything on the Titan. However if it was me I'd buy the titan just because of the possibility of growth. I have 2 months of the year where I wish I had dual wands....as long as the extra payment wont hurt you.