Hi Jeff, yeah, I see this post is down my alley.
I bought a used Big Red back in 96. It had been modified a wee bit when I bought it and I've been re-engineering it since then. Works better now than the day I bought it.
http://mikeysboard.com/forum/viewtopic. ... highlight=
The unit needed to stay below 190 because the water was pressurized AFTER heating, the pressure pump seals are only good till 200 at best.
The guy I bought it from used Formula 90, dumped a cup into the fresh water tank, that water was pumped into a mix tank at the front of the mnachine where it circulated through the motor and a small exhaust HX. Then it would go to the pump and out. The Rinse water WAS the coolant. As you clean, cold water is brought in, cooling the unit, or it was dumped to the recovery.
Mine runs a 4108 Perkins, and that motor won't stop for nothing, except over heating and running out of fuel. Burns a little over 1/2 gal/hr.
It'll heat up within 15 minutes when reved up and with the doors closed and the dual silencers, its quite quiet.
Yes, the engine exhaust, the way mine is set up anyway, is attached to the blower exhaust. I start mine with the clutch engaged, the blower pushes the exhaust out. There's really nothing under the machine at all.
If it weren't for all the quirks to this machine it would be a force to reccon with. Greenie's is much cleaner than mine.