I have had a 12v burner back in 1989 thru 2000. Always something wrong with the electrical every 6 or 8 months.
Depending on what is your dollar amount for your budget, Landa appears to have the better quality in my opinion.
Alkota has the better pricing and are very decent machines for general pressure washing.
MtM copies Landa design
Hydro Tek is in the middle, not allot of options
Again, All of my opion...
What is important is the BTU's
This is where they ( The Manufactures ) will " Cheat" on the unit.
The higher the BTU's the hotter the water in most cases. ( Vertical vs horizontal will or may impact the heat out put) I would take a look at "as much heat as I can afford". Try if possible to reach 600,000 BTU's for a 8 GPM machine. I still think this is too low, but it would be a good starter. Also check to see how much of the fittings are made in China VS USA. And NEVER believe the phrase " UP TO 220 degrees at full load" Ask them to prove it by a test run. Take a Pressure/Temp Test Set (
http://www.pressureparts.com/None-C-Tools-Pressure-Part-449048.aspx ) Any dealer will have one of these.
1. If you have an extra hose, bring it with you before testing, connect the hose to the 50ft hose that comes with the unit. Most use 200 ft of hose... try to do the same. Reel out the hose all the way... un coiled.
2. Unit in the shade on a cool day ( Reason, most of us work at night )
3. Put this gauge at the end of the hose between the gun and the hose quick connect.
4. Run the unit in an open gun position. DO NOT open and close the water flow.
5. In 4 minutes, check the temperature at the pressure rating.
6. Then cool the machine down to 100 degrees or less. Then start all over again. When you hit the temp as before, then turn off the flow and on the flow with the gun, waiting 3 minutes to 5 minutes between open gun and closed gun. This will simulate the working conditions. You will be able to see the temp difference and how the motor is handling the stress.
You want at least 200 degrees for gum removal. The hotter the unit, the better it will be for the removal of stains, oil, food bi product, efficiency.